/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-more/buffer-mult.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:19:59,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:19:59,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:19:59,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:19:59,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 06:19:59,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 06:19:59,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 06:19:59,395 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 06:19:59,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:19:59,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:19:59,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:19:59,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:19:59,416 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:19:59,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:19:59,416 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:19:59,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:19:59,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:19:59,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:19:59,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:19:59,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:19:59,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:19:59,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:19:59,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:19:59,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:19:59,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:19:59,747 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:19:59,748 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:19:59,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl [2021-06-05 06:19:59,749 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl' [2021-06-05 06:19:59,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:19:59,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:19:59,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:19:59,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:19:59,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:19:59,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:19:59,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:19:59,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:19:59,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:19:59,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,843 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/1) ... [2021-06-05 06:19:59,854 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:19:59,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:19:59,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:19:59,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:19:59,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (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 06:19:59,918 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:19:59,918 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:19:59,918 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:19:59,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:19:59,919 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:19:59,919 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:19:59,919 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:19:59,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:19:59,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:19:59,920 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 06:19:59,920 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 06:19:59,921 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 06:19:59,922 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 06:19:59,922 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 06:19:59,922 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 06:19:59,923 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 06:20:00,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:20:00,143 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:20:00,144 INFO L202 PluginConnector]: Adding new model buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:00 BoogieIcfgContainer [2021-06-05 06:20:00,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:20:00,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:20:00,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:20:00,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:20:00,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:19:59" (1/2) ... [2021-06-05 06:20:00,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4959ee47 and model type buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:20:00, skipping insertion in model container [2021-06-05 06:20:00,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:20:00" (2/2) ... [2021-06-05 06:20:00,150 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult.wvr.bpl [2021-06-05 06:20:00,167 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:20:00,168 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:20:00,168 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:20:00,169 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:20:00,222 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 06:20:00,241 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 06:20:00,255 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:20:00,255 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:20:00,255 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:20:00,255 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:20:00,256 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:20:00,256 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:20:00,256 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:20:00,256 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:20:00,263 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 06:20:00,324 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 06:20:00,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:00,350 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 06:20:00,350 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:00,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1591089523, now seen corresponding path program 1 times [2021-06-05 06:20:00,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:00,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637284186] [2021-06-05 06:20:00,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:00,528 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 06:20:00,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:00,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637284186] [2021-06-05 06:20:00,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637284186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:00,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:00,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 06:20:00,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419121515] [2021-06-05 06:20:00,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:20:00,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:00,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:20:00,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:20:00,554 INFO L87 Difference]: Start difference. First operand has 637 states, 635 states have (on average 3.8866141732283466) internal successors, (2468), 636 states have internal predecessors, (2468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:00,629 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2021-06-05 06:20:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:20:00,631 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 06:20:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:00,659 INFO L225 Difference]: With dead ends: 1236 [2021-06-05 06:20:00,659 INFO L226 Difference]: Without dead ends: 1109 [2021-06-05 06:20:00,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:20:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-06-05 06:20:00,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2021-06-05 06:20:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2021-06-05 06:20:00,776 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2021-06-05 06:20:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:00,777 INFO L482 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2021-06-05 06:20:00,777 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 06:20:00,778 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2021-06-05 06:20:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:20:00,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:00,786 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] [2021-06-05 06:20:00,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:20:00,787 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:00,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1256412427, now seen corresponding path program 1 times [2021-06-05 06:20:00,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:00,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730073460] [2021-06-05 06:20:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:00,868 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 06:20:00,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:00,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730073460] [2021-06-05 06:20:00,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730073460] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:00,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:00,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509717727] [2021-06-05 06:20:00,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:00,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:00,874 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:00,939 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2021-06-05 06:20:00,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:00,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:20:00,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:00,950 INFO L225 Difference]: With dead ends: 1524 [2021-06-05 06:20:00,950 INFO L226 Difference]: Without dead ends: 1418 [2021-06-05 06:20:00,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-06-05 06:20:00,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2021-06-05 06:20:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2021-06-05 06:20:00,998 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2021-06-05 06:20:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:00,998 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2021-06-05 06:20:00,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2021-06-05 06:20:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 06:20:01,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:01,004 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] [2021-06-05 06:20:01,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 06:20:01,005 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash -898961871, now seen corresponding path program 1 times [2021-06-05 06:20:01,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:01,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030162186] [2021-06-05 06:20:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:01,066 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 06:20:01,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030162186] [2021-06-05 06:20:01,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030162186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:01,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:01,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:01,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043774566] [2021-06-05 06:20:01,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:01,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:01,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:01,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:01,070 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:01,128 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2021-06-05 06:20:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 06:20:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:01,146 INFO L225 Difference]: With dead ends: 2017 [2021-06-05 06:20:01,146 INFO L226 Difference]: Without dead ends: 1875 [2021-06-05 06:20:01,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:01,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2021-06-05 06:20:01,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2021-06-05 06:20:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2021-06-05 06:20:01,220 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2021-06-05 06:20:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:01,221 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2021-06-05 06:20:01,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2021-06-05 06:20:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:01,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:01,230 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, 1, 1] [2021-06-05 06:20:01,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:20:01,231 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:01,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:01,231 INFO L82 PathProgramCache]: Analyzing trace with hash 100882901, now seen corresponding path program 1 times [2021-06-05 06:20:01,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:01,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133573239] [2021-06-05 06:20:01,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:01,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:01,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133573239] [2021-06-05 06:20:01,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133573239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:01,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811919490] [2021-06-05 06:20:01,292 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 06:20:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:01,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:20:01,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:01,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811919490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:01,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:01,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2021-06-05 06:20:01,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622743724] [2021-06-05 06:20:01,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:20:01,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:01,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:20:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:01,510 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:01,646 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2021-06-05 06:20:01,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:01,647 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:01,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:01,661 INFO L225 Difference]: With dead ends: 2308 [2021-06-05 06:20:01,662 INFO L226 Difference]: Without dead ends: 2108 [2021-06-05 06:20:01,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-06-05 06:20:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2021-06-05 06:20:01,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2021-06-05 06:20:01,733 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2021-06-05 06:20:01,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:01,733 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2021-06-05 06:20:01,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2021-06-05 06:20:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:01,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:01,739 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, 1, 1] [2021-06-05 06:20:01,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:01,964 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:01,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1771388146, now seen corresponding path program 1 times [2021-06-05 06:20:01,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:01,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634626644] [2021-06-05 06:20:01,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:01,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:02,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634626644] [2021-06-05 06:20:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634626644] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:02,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:02,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:02,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610144145] [2021-06-05 06:20:02,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:02,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:02,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:02,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:02,008 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:02,085 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2021-06-05 06:20:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:20:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:02,097 INFO L225 Difference]: With dead ends: 1950 [2021-06-05 06:20:02,097 INFO L226 Difference]: Without dead ends: 1860 [2021-06-05 06:20:02,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-06-05 06:20:02,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2021-06-05 06:20:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2021-06-05 06:20:02,176 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2021-06-05 06:20:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:02,176 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2021-06-05 06:20:02,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2021-06-05 06:20:02,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:02,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:02,181 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, 1, 1] [2021-06-05 06:20:02,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:20:02,181 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:02,182 INFO L82 PathProgramCache]: Analyzing trace with hash 2115354510, now seen corresponding path program 2 times [2021-06-05 06:20:02,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:02,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817934352] [2021-06-05 06:20:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:02,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:02,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817934352] [2021-06-05 06:20:02,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817934352] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:02,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:02,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:02,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455960734] [2021-06-05 06:20:02,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:02,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:02,287 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:02,354 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2021-06-05 06:20:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 06:20:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:02,362 INFO L225 Difference]: With dead ends: 1308 [2021-06-05 06:20:02,362 INFO L226 Difference]: Without dead ends: 1308 [2021-06-05 06:20:02,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-06-05 06:20:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2021-06-05 06:20:02,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2021-06-05 06:20:02,400 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2021-06-05 06:20:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:02,401 INFO L482 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2021-06-05 06:20:02,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2021-06-05 06:20:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:20:02,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:02,404 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, 1, 1] [2021-06-05 06:20:02,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 06:20:02,405 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash 373109395, now seen corresponding path program 2 times [2021-06-05 06:20:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:02,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740994087] [2021-06-05 06:20:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:02,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:02,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740994087] [2021-06-05 06:20:02,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740994087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:02,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:20:02,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:20:02,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30672057] [2021-06-05 06:20:02,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:02,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:02,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 06:20:02,454 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:02,500 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2021-06-05 06:20:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:20:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:02,508 INFO L225 Difference]: With dead ends: 1142 [2021-06-05 06:20:02,508 INFO L226 Difference]: Without dead ends: 1120 [2021-06-05 06:20:02,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-06-05 06:20:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2021-06-05 06:20:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2021-06-05 06:20:02,540 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2021-06-05 06:20:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:02,540 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2021-06-05 06:20:02,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2021-06-05 06:20:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:20:02,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:02,544 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, 1, 1, 1, 1, 1] [2021-06-05 06:20:02,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 06:20:02,544 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -896204878, now seen corresponding path program 1 times [2021-06-05 06:20:02,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:02,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622303756] [2021-06-05 06:20:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:02,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:02,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622303756] [2021-06-05 06:20:02,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622303756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:02,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38225427] [2021-06-05 06:20:02,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:20:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:20:02,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:02,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38225427] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:02,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:20:02,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 06:20:02,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141026130] [2021-06-05 06:20:02,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:02,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:02,702 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:02,721 INFO L93 Difference]: Finished difference Result 1344 states and 4969 transitions. [2021-06-05 06:20:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:02,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:20:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:02,730 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 06:20:02,730 INFO L226 Difference]: Without dead ends: 1344 [2021-06-05 06:20:02,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-05 06:20:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 926. [2021-06-05 06:20:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.6324324324324326) internal successors, (3360), 925 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 06:20:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3360 transitions. [2021-06-05 06:20:02,761 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3360 transitions. Word has length 27 [2021-06-05 06:20:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:02,763 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 3360 transitions. [2021-06-05 06:20:02,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3360 transitions. [2021-06-05 06:20:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 06:20:02,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:02,768 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, 1, 1, 1, 1, 1] [2021-06-05 06:20:02,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:02,991 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:02,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:02,991 INFO L82 PathProgramCache]: Analyzing trace with hash 591603758, now seen corresponding path program 1 times [2021-06-05 06:20:02,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:02,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412771781] [2021-06-05 06:20:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:03,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:03,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412771781] [2021-06-05 06:20:03,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412771781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:03,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740185405] [2021-06-05 06:20:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 06:20:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 06:20:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:03,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740185405] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:20:03,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 06:20:03,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-06-05 06:20:03,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219589176] [2021-06-05 06:20:03,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 06:20:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:03,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 06:20:03,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:03,138 INFO L87 Difference]: Start difference. First operand 926 states and 3360 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:03,160 INFO L93 Difference]: Finished difference Result 1608 states and 5808 transitions. [2021-06-05 06:20:03,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 06:20:03,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 06:20:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:03,171 INFO L225 Difference]: With dead ends: 1608 [2021-06-05 06:20:03,171 INFO L226 Difference]: Without dead ends: 1608 [2021-06-05 06:20:03,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 06:20:03,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-06-05 06:20:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1079. [2021-06-05 06:20:03,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 3.6614100185528757) internal successors, (3947), 1078 states have internal predecessors, (3947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3947 transitions. [2021-06-05 06:20:03,211 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3947 transitions. Word has length 27 [2021-06-05 06:20:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:03,211 INFO L482 AbstractCegarLoop]: Abstraction has 1079 states and 3947 transitions. [2021-06-05 06:20:03,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3947 transitions. [2021-06-05 06:20:03,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:03,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:03,215 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:03,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:03,425 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:03,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:03,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1107902640, now seen corresponding path program 1 times [2021-06-05 06:20:03,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:03,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211944100] [2021-06-05 06:20:03,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:03,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:03,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211944100] [2021-06-05 06:20:03,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211944100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413200035] [2021-06-05 06:20:03,534 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 06:20:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:03,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:20:03,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:03,700 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 20 treesize of output 14 [2021-06-05 06:20:03,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:03,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:03,707 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 06:20:03,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 06:20:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:03,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413200035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:03,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:03,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 06:20:03,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379632042] [2021-06-05 06:20:03,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:20:03,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:03,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:20:03,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:03,751 INFO L87 Difference]: Start difference. First operand 1079 states and 3947 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 06:20:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:03,859 INFO L93 Difference]: Finished difference Result 2469 states and 9254 transitions. [2021-06-05 06:20:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:03,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 29 [2021-06-05 06:20:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:03,871 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 06:20:03,871 INFO L226 Difference]: Without dead ends: 2390 [2021-06-05 06:20:03,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:03,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-06-05 06:20:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 1615. [2021-06-05 06:20:03,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.7360594795539033) internal successors, (6030), 1614 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 6030 transitions. [2021-06-05 06:20:03,936 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 6030 transitions. Word has length 29 [2021-06-05 06:20:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:03,936 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 6030 transitions. [2021-06-05 06:20:03,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 06:20:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 6030 transitions. [2021-06-05 06:20:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:03,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:03,942 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:04,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:04,166 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash -769853710, now seen corresponding path program 2 times [2021-06-05 06:20:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:04,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045551979] [2021-06-05 06:20:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:04,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045551979] [2021-06-05 06:20:04,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045551979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:04,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488378972] [2021-06-05 06:20:04,336 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 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 06:20:04,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:04,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:04,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:20:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:04,477 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 20 treesize of output 14 [2021-06-05 06:20:04,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:04,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:04,485 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 06:20:04,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 06:20:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:04,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488378972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:04,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:04,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 06:20:04,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177380434] [2021-06-05 06:20:04,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:20:04,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:20:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:04,514 INFO L87 Difference]: Start difference. First operand 1615 states and 6030 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:04,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:04,630 INFO L93 Difference]: Finished difference Result 2566 states and 9644 transitions. [2021-06-05 06:20:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:04,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 06:20:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:04,649 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 06:20:04,649 INFO L226 Difference]: Without dead ends: 2487 [2021-06-05 06:20:04,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:04,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-05 06:20:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1741. [2021-06-05 06:20:04,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 3.7379310344827585) internal successors, (6504), 1740 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 6504 transitions. [2021-06-05 06:20:04,714 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 6504 transitions. Word has length 29 [2021-06-05 06:20:04,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:04,716 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 6504 transitions. [2021-06-05 06:20:04,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 6504 transitions. [2021-06-05 06:20:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:04,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:04,722 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:04,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 06:20:04,944 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash 720950344, now seen corresponding path program 3 times [2021-06-05 06:20:04,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:04,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531447532] [2021-06-05 06:20:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:05,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531447532] [2021-06-05 06:20:05,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531447532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:05,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067937060] [2021-06-05 06:20:05,005 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 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 06:20:05,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:20:05,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:05,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:20:05,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:05,085 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 16 treesize of output 10 [2021-06-05 06:20:05,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:05,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:05,091 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 06:20:05,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:10 [2021-06-05 06:20:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:05,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067937060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:05,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:05,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 06:20:05,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111862196] [2021-06-05 06:20:05,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:20:05,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:20:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:20:05,132 INFO L87 Difference]: Start difference. First operand 1741 states and 6504 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 06:20:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:05,206 INFO L93 Difference]: Finished difference Result 3028 states and 11382 transitions. [2021-06-05 06:20:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:05,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 06:20:05,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:05,218 INFO L225 Difference]: With dead ends: 3028 [2021-06-05 06:20:05,219 INFO L226 Difference]: Without dead ends: 2949 [2021-06-05 06:20:05,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:20:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-05 06:20:05,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 1837. [2021-06-05 06:20:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.7265795206971677) internal successors, (6842), 1836 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6842 transitions. [2021-06-05 06:20:05,277 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6842 transitions. Word has length 29 [2021-06-05 06:20:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:05,278 INFO L482 AbstractCegarLoop]: Abstraction has 1837 states and 6842 transitions. [2021-06-05 06:20:05,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 06:20:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6842 transitions. [2021-06-05 06:20:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:05,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:05,284 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:05,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:05,505 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash -949623576, now seen corresponding path program 4 times [2021-06-05 06:20:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:05,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924684706] [2021-06-05 06:20:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:05,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:05,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924684706] [2021-06-05 06:20:05,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924684706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:05,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630381207] [2021-06-05 06:20:05,696 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 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 06:20:05,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:05,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:05,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:20:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:05,845 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 20 treesize of output 14 [2021-06-05 06:20:05,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:05,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:05,852 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 06:20:05,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 06:20:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630381207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:05,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:05,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 06:20:05,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659807401] [2021-06-05 06:20:05,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:20:05,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:20:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:05,886 INFO L87 Difference]: Start difference. First operand 1837 states and 6842 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 06:20:06,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:06,008 INFO L93 Difference]: Finished difference Result 3084 states and 11626 transitions. [2021-06-05 06:20:06,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:06,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 29 [2021-06-05 06:20:06,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:06,022 INFO L225 Difference]: With dead ends: 3084 [2021-06-05 06:20:06,023 INFO L226 Difference]: Without dead ends: 3005 [2021-06-05 06:20:06,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:06,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-06-05 06:20:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2051. [2021-06-05 06:20:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.7434146341463417) internal successors, (7674), 2050 states have internal predecessors, (7674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 7674 transitions. [2021-06-05 06:20:06,095 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 7674 transitions. Word has length 29 [2021-06-05 06:20:06,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:06,095 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 7674 transitions. [2021-06-05 06:20:06,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 06:20:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 7674 transitions. [2021-06-05 06:20:06,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:06,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:06,102 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:06,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:06,317 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1467587370, now seen corresponding path program 5 times [2021-06-05 06:20:06,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:06,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48243866] [2021-06-05 06:20:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:06,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:06,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48243866] [2021-06-05 06:20:06,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48243866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:06,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293990333] [2021-06-05 06:20:06,385 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 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 06:20:06,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:06,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 06:20:06,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:06,529 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 20 treesize of output 14 [2021-06-05 06:20:06,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:06,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:06,557 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 06:20:06,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:15 [2021-06-05 06:20:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:06,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293990333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:06,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:06,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 06:20:06,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209268170] [2021-06-05 06:20:06,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 06:20:06,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 06:20:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:06,586 INFO L87 Difference]: Start difference. First operand 2051 states and 7674 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 06:20:06,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:06,685 INFO L93 Difference]: Finished difference Result 2912 states and 10948 transitions. [2021-06-05 06:20:06,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:06,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 29 [2021-06-05 06:20:06,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:06,696 INFO L225 Difference]: With dead ends: 2912 [2021-06-05 06:20:06,696 INFO L226 Difference]: Without dead ends: 2833 [2021-06-05 06:20:06,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:06,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2021-06-05 06:20:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 1852. [2021-06-05 06:20:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.731496488384657) internal successors, (6907), 1851 states have internal predecessors, (6907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:06,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6907 transitions. [2021-06-05 06:20:06,753 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6907 transitions. Word has length 29 [2021-06-05 06:20:06,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:06,754 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6907 transitions. [2021-06-05 06:20:06,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 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 06:20:06,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6907 transitions. [2021-06-05 06:20:06,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 06:20:06,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:06,760 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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:06,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 06:20:06,982 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:06,983 INFO L82 PathProgramCache]: Analyzing trace with hash -55564736, now seen corresponding path program 6 times [2021-06-05 06:20:06,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:06,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641379200] [2021-06-05 06:20:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:07,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:07,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641379200] [2021-06-05 06:20:07,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641379200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:07,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091079068] [2021-06-05 06:20:07,079 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 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 06:20:07,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:20:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:07,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 06:20:07,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:07,157 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 18 treesize of output 12 [2021-06-05 06:20:07,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:07,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:07,163 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 06:20:07,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2021-06-05 06:20:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:07,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091079068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:07,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:07,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 06:20:07,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664690725] [2021-06-05 06:20:07,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:20:07,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:07,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:20:07,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:20:07,202 INFO L87 Difference]: Start difference. First operand 1852 states and 6907 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 06:20:07,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:07,308 INFO L93 Difference]: Finished difference Result 2793 states and 10453 transitions. [2021-06-05 06:20:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:07,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 06:20:07,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:07,318 INFO L225 Difference]: With dead ends: 2793 [2021-06-05 06:20:07,318 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 06:20:07,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:20:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 06:20:07,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 1892. [2021-06-05 06:20:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.7223691168693813) internal successors, (7039), 1891 states have internal predecessors, (7039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 7039 transitions. [2021-06-05 06:20:07,376 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 7039 transitions. Word has length 29 [2021-06-05 06:20:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:07,376 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 7039 transitions. [2021-06-05 06:20:07,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 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 06:20:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 7039 transitions. [2021-06-05 06:20:07,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:07,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:07,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:07,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:20:07,596 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash -945078094, now seen corresponding path program 7 times [2021-06-05 06:20:07,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:07,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687979802] [2021-06-05 06:20:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:07,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:07,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687979802] [2021-06-05 06:20:07,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687979802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:07,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88207483] [2021-06-05 06:20:07,703 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 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 06:20:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:07,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:20:07,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:07,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88207483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:07,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:07,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:20:07,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319485283] [2021-06-05 06:20:07,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:20:07,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:07,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:20:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:20:07,791 INFO L87 Difference]: Start difference. First operand 1892 states and 7039 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:07,864 INFO L93 Difference]: Finished difference Result 3393 states and 12285 transitions. [2021-06-05 06:20:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:07,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 06:20:07,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:07,875 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 06:20:07,876 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 06:20:07,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:07,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 06:20:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2725. [2021-06-05 06:20:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2725 states, 2724 states have (on average 3.752202643171806) internal successors, (10221), 2724 states have internal predecessors, (10221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2725 states to 2725 states and 10221 transitions. [2021-06-05 06:20:07,959 INFO L78 Accepts]: Start accepts. Automaton has 2725 states and 10221 transitions. Word has length 31 [2021-06-05 06:20:07,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:07,959 INFO L482 AbstractCegarLoop]: Abstraction has 2725 states and 10221 transitions. [2021-06-05 06:20:07,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:07,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2725 states and 10221 transitions. [2021-06-05 06:20:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 06:20:07,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:07,966 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:08,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 06:20:08,181 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:08,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:08,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1385088466, now seen corresponding path program 8 times [2021-06-05 06:20:08,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:08,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146017029] [2021-06-05 06:20:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:08,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:08,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146017029] [2021-06-05 06:20:08,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146017029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:08,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600815551] [2021-06-05 06:20:08,216 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 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 06:20:08,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:08,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 06:20:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:08,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:08,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600815551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:08,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:08,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 06:20:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491734265] [2021-06-05 06:20:08,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 06:20:08,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:08,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 06:20:08,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 06:20:08,322 INFO L87 Difference]: Start difference. First operand 2725 states and 10221 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 06:20:08,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:08,427 INFO L93 Difference]: Finished difference Result 5257 states and 19424 transitions. [2021-06-05 06:20:08,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:20:08,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 31 [2021-06-05 06:20:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:08,444 INFO L225 Difference]: With dead ends: 5257 [2021-06-05 06:20:08,444 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 06:20:08,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-06-05 06:20:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 06:20:08,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4359. [2021-06-05 06:20:08,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 4358 states have (on average 3.8077099586966496) internal successors, (16594), 4358 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:08,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 16594 transitions. [2021-06-05 06:20:08,552 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 16594 transitions. Word has length 31 [2021-06-05 06:20:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:08,553 INFO L482 AbstractCegarLoop]: Abstraction has 4359 states and 16594 transitions. [2021-06-05 06:20:08,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 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 06:20:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 16594 transitions. [2021-06-05 06:20:08,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:08,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:08,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:08,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:20:08,786 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:08,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1789712274, now seen corresponding path program 9 times [2021-06-05 06:20:08,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:08,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175639024] [2021-06-05 06:20:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:20:08,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175639024] [2021-06-05 06:20:08,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175639024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775155648] [2021-06-05 06:20:08,818 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 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 06:20:08,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:20:08,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:08,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:20:08,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775155648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:08,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:08,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:20:08,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886860011] [2021-06-05 06:20:08,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:20:08,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:08,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:20:08,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:20:08,968 INFO L87 Difference]: Start difference. First operand 4359 states and 16594 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:09,266 INFO L93 Difference]: Finished difference Result 16323 states and 59821 transitions. [2021-06-05 06:20:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:20:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:09,312 INFO L225 Difference]: With dead ends: 16323 [2021-06-05 06:20:09,312 INFO L226 Difference]: Without dead ends: 13965 [2021-06-05 06:20:09,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:20:09,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13965 states. [2021-06-05 06:20:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13965 to 7026. [2021-06-05 06:20:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7026 states, 7025 states have (on average 3.893523131672598) internal successors, (27352), 7025 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7026 states to 7026 states and 27352 transitions. [2021-06-05 06:20:09,639 INFO L78 Accepts]: Start accepts. Automaton has 7026 states and 27352 transitions. Word has length 34 [2021-06-05 06:20:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:09,639 INFO L482 AbstractCegarLoop]: Abstraction has 7026 states and 27352 transitions. [2021-06-05 06:20:09,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7026 states and 27352 transitions. [2021-06-05 06:20:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:09,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:09,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:09,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 06:20:09,881 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1811384725, now seen corresponding path program 10 times [2021-06-05 06:20:09,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:09,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597359626] [2021-06-05 06:20:09,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:20:09,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:09,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597359626] [2021-06-05 06:20:09,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597359626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:09,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084673727] [2021-06-05 06:20:09,970 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 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 06:20:10,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:10,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:10,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:20:10,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084673727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:10,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:10,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:20:10,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529972441] [2021-06-05 06:20:10,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:20:10,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:20:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:20:10,109 INFO L87 Difference]: Start difference. First operand 7026 states and 27352 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:10,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:10,522 INFO L93 Difference]: Finished difference Result 18970 states and 71100 transitions. [2021-06-05 06:20:10,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:20:10,522 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:10,654 INFO L225 Difference]: With dead ends: 18970 [2021-06-05 06:20:10,655 INFO L226 Difference]: Without dead ends: 18531 [2021-06-05 06:20:10,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:20:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18531 states. [2021-06-05 06:20:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18531 to 10689. [2021-06-05 06:20:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10689 states, 10688 states have (on average 3.994479790419162) internal successors, (42693), 10688 states have internal predecessors, (42693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10689 states to 10689 states and 42693 transitions. [2021-06-05 06:20:11,158 INFO L78 Accepts]: Start accepts. Automaton has 10689 states and 42693 transitions. Word has length 34 [2021-06-05 06:20:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:11,158 INFO L482 AbstractCegarLoop]: Abstraction has 10689 states and 42693 transitions. [2021-06-05 06:20:11,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10689 states and 42693 transitions. [2021-06-05 06:20:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:11,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:11,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:11,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:11,467 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1977044948, now seen corresponding path program 11 times [2021-06-05 06:20:11,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:11,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559560732] [2021-06-05 06:20:11,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:11,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559560732] [2021-06-05 06:20:11,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559560732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:11,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746755664] [2021-06-05 06:20:11,493 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:11,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:20:11,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:11,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746755664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:11,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:11,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:20:11,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863474868] [2021-06-05 06:20:11,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:20:11,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:11,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:20:11,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:11,609 INFO L87 Difference]: Start difference. First operand 10689 states and 42693 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:11,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:11,919 INFO L93 Difference]: Finished difference Result 18432 states and 70487 transitions. [2021-06-05 06:20:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:20:11,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:11,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:11,959 INFO L225 Difference]: With dead ends: 18432 [2021-06-05 06:20:11,960 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 06:20:11,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:20:11,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 06:20:12,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 10639. [2021-06-05 06:20:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10639 states, 10638 states have (on average 3.9989659710471894) internal successors, (42541), 10638 states have internal predecessors, (42541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10639 states to 10639 states and 42541 transitions. [2021-06-05 06:20:12,534 INFO L78 Accepts]: Start accepts. Automaton has 10639 states and 42541 transitions. Word has length 34 [2021-06-05 06:20:12,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:12,534 INFO L482 AbstractCegarLoop]: Abstraction has 10639 states and 42541 transitions. [2021-06-05 06:20:12,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 10639 states and 42541 transitions. [2021-06-05 06:20:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:12,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:12,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:12,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:12,785 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:12,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:12,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1356082631, now seen corresponding path program 12 times [2021-06-05 06:20:12,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:12,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386969263] [2021-06-05 06:20:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:12,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386969263] [2021-06-05 06:20:12,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386969263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899537733] [2021-06-05 06:20:12,895 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 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 06:20:12,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:20:12,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:12,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:12,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:20:13,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899537733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:13,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:13,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:20:13,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752129838] [2021-06-05 06:20:13,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:20:13,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:13,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:20:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:13,015 INFO L87 Difference]: Start difference. First operand 10639 states and 42541 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:13,355 INFO L93 Difference]: Finished difference Result 20371 states and 77140 transitions. [2021-06-05 06:20:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:20:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:13,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:13,405 INFO L225 Difference]: With dead ends: 20371 [2021-06-05 06:20:13,405 INFO L226 Difference]: Without dead ends: 18706 [2021-06-05 06:20:13,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:20:13,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18706 states. [2021-06-05 06:20:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18706 to 13271. [2021-06-05 06:20:13,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13271 states, 13270 states have (on average 4.00783722682743) internal successors, (53184), 13270 states have internal predecessors, (53184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13271 states to 13271 states and 53184 transitions. [2021-06-05 06:20:13,889 INFO L78 Accepts]: Start accepts. Automaton has 13271 states and 53184 transitions. Word has length 34 [2021-06-05 06:20:13,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:13,889 INFO L482 AbstractCegarLoop]: Abstraction has 13271 states and 53184 transitions. [2021-06-05 06:20:13,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 13271 states and 53184 transitions. [2021-06-05 06:20:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:13,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:13,926 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:14,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 06:20:14,151 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:14,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:14,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1475484620, now seen corresponding path program 13 times [2021-06-05 06:20:14,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:14,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875957871] [2021-06-05 06:20:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:20:14,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:14,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875957871] [2021-06-05 06:20:14,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875957871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:14,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011399141] [2021-06-05 06:20:14,184 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 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 06:20:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:14,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:14,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011399141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:14,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:14,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:20:14,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6276087] [2021-06-05 06:20:14,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:20:14,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:20:14,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:14,328 INFO L87 Difference]: Start difference. First operand 13271 states and 53184 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:14,809 INFO L93 Difference]: Finished difference Result 29290 states and 113267 transitions. [2021-06-05 06:20:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:20:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:14,890 INFO L225 Difference]: With dead ends: 29290 [2021-06-05 06:20:14,890 INFO L226 Difference]: Without dead ends: 27668 [2021-06-05 06:20:14,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:20:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27668 states. [2021-06-05 06:20:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27668 to 18232. [2021-06-05 06:20:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18232 states, 18231 states have (on average 4.042016345784653) internal successors, (73690), 18231 states have internal predecessors, (73690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18232 states to 18232 states and 73690 transitions. [2021-06-05 06:20:15,643 INFO L78 Accepts]: Start accepts. Automaton has 18232 states and 73690 transitions. Word has length 34 [2021-06-05 06:20:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:15,644 INFO L482 AbstractCegarLoop]: Abstraction has 18232 states and 73690 transitions. [2021-06-05 06:20:15,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18232 states and 73690 transitions. [2021-06-05 06:20:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:15,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:15,680 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:15,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:15,881 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:15,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:15,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1888062838, now seen corresponding path program 14 times [2021-06-05 06:20:15,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:15,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439321068] [2021-06-05 06:20:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:20:15,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:15,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439321068] [2021-06-05 06:20:15,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439321068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:15,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306658420] [2021-06-05 06:20:15,917 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 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 06:20:15,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:15,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:16,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306658420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:16,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:16,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:20:16,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779479066] [2021-06-05 06:20:16,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:20:16,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:16,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:20:16,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:16,069 INFO L87 Difference]: Start difference. First operand 18232 states and 73690 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:16,510 INFO L93 Difference]: Finished difference Result 27112 states and 106138 transitions. [2021-06-05 06:20:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:20:16,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:16,595 INFO L225 Difference]: With dead ends: 27112 [2021-06-05 06:20:16,595 INFO L226 Difference]: Without dead ends: 26976 [2021-06-05 06:20:16,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:20:16,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26976 states. [2021-06-05 06:20:17,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26976 to 18044. [2021-06-05 06:20:17,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18044 states, 18043 states have (on average 4.0432300615197025) internal successors, (72952), 18043 states have internal predecessors, (72952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:17,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18044 states to 18044 states and 72952 transitions. [2021-06-05 06:20:17,153 INFO L78 Accepts]: Start accepts. Automaton has 18044 states and 72952 transitions. Word has length 34 [2021-06-05 06:20:17,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:17,153 INFO L482 AbstractCegarLoop]: Abstraction has 18044 states and 72952 transitions. [2021-06-05 06:20:17,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18044 states and 72952 transitions. [2021-06-05 06:20:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:17,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:17,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:17,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:20:17,417 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:17,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:17,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2054889942, now seen corresponding path program 15 times [2021-06-05 06:20:17,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:17,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979043384] [2021-06-05 06:20:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:17,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:17,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979043384] [2021-06-05 06:20:17,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979043384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:17,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513686174] [2021-06-05 06:20:17,453 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 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 06:20:17,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:20:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:17,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:20:17,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513686174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:17,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:17,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 06:20:17,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364277966] [2021-06-05 06:20:17,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:20:17,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:17,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:20:17,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:20:17,593 INFO L87 Difference]: Start difference. First operand 18044 states and 72952 transitions. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:18,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:18,186 INFO L93 Difference]: Finished difference Result 30228 states and 119473 transitions. [2021-06-05 06:20:18,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:20:18,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:18,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:18,273 INFO L225 Difference]: With dead ends: 30228 [2021-06-05 06:20:18,273 INFO L226 Difference]: Without dead ends: 30070 [2021-06-05 06:20:18,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:20:18,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30070 states. [2021-06-05 06:20:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30070 to 20840. [2021-06-05 06:20:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 4.074667690388214) internal successors, (84912), 20839 states have internal predecessors, (84912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 84912 transitions. [2021-06-05 06:20:18,863 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 84912 transitions. Word has length 34 [2021-06-05 06:20:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:18,863 INFO L482 AbstractCegarLoop]: Abstraction has 20840 states and 84912 transitions. [2021-06-05 06:20:18,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 84912 transitions. [2021-06-05 06:20:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:20:18,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:18,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:19,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:20:19,135 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:19,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:19,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2024685389, now seen corresponding path program 16 times [2021-06-05 06:20:19,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:19,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453463118] [2021-06-05 06:20:19,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 06:20:19,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:19,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453463118] [2021-06-05 06:20:19,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453463118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:19,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786042370] [2021-06-05 06:20:19,155 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:19,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:19,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 06:20:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 06:20:19,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786042370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:19,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:19,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 06:20:19,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919821093] [2021-06-05 06:20:19,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:20:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:20:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:20:19,254 INFO L87 Difference]: Start difference. First operand 20840 states and 84912 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:19,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:19,836 INFO L93 Difference]: Finished difference Result 28338 states and 112394 transitions. [2021-06-05 06:20:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:20:19,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:20:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:19,917 INFO L225 Difference]: With dead ends: 28338 [2021-06-05 06:20:19,917 INFO L226 Difference]: Without dead ends: 28230 [2021-06-05 06:20:19,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:20:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28230 states. [2021-06-05 06:20:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28230 to 21970. [2021-06-05 06:20:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21970 states, 21969 states have (on average 4.097774136282944) internal successors, (90024), 21969 states have internal predecessors, (90024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21970 states to 21970 states and 90024 transitions. [2021-06-05 06:20:20,548 INFO L78 Accepts]: Start accepts. Automaton has 21970 states and 90024 transitions. Word has length 34 [2021-06-05 06:20:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:20,548 INFO L482 AbstractCegarLoop]: Abstraction has 21970 states and 90024 transitions. [2021-06-05 06:20:20,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 21970 states and 90024 transitions. [2021-06-05 06:20:20,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:20:20,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:20,590 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:20,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:20:20,790 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:20,791 INFO L82 PathProgramCache]: Analyzing trace with hash 31444491, now seen corresponding path program 17 times [2021-06-05 06:20:20,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:20,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402815447] [2021-06-05 06:20:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:20:20,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:20,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402815447] [2021-06-05 06:20:20,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402815447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:20,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88115028] [2021-06-05 06:20:20,824 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 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 06:20:20,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:20:20,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:20,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:20:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 06:20:20,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88115028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:20,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:20,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 06:20:20,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007303173] [2021-06-05 06:20:20,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:20:20,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:20,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:20:20,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:20,923 INFO L87 Difference]: Start difference. First operand 21970 states and 90024 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:21,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:21,111 INFO L93 Difference]: Finished difference Result 29898 states and 123092 transitions. [2021-06-05 06:20:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:20:21,113 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 06:20:21,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:21,228 INFO L225 Difference]: With dead ends: 29898 [2021-06-05 06:20:21,228 INFO L226 Difference]: Without dead ends: 29898 [2021-06-05 06:20:21,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29898 states. [2021-06-05 06:20:21,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29898 to 24224. [2021-06-05 06:20:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24224 states, 24223 states have (on average 4.093588737976304) internal successors, (99159), 24223 states have internal predecessors, (99159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24224 states to 24224 states and 99159 transitions. [2021-06-05 06:20:22,025 INFO L78 Accepts]: Start accepts. Automaton has 24224 states and 99159 transitions. Word has length 37 [2021-06-05 06:20:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:22,025 INFO L482 AbstractCegarLoop]: Abstraction has 24224 states and 99159 transitions. [2021-06-05 06:20:22,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 24224 states and 99159 transitions. [2021-06-05 06:20:22,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 06:20:22,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:22,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:22,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 06:20:22,272 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash -906169461, now seen corresponding path program 18 times [2021-06-05 06:20:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:22,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761026434] [2021-06-05 06:20:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:20:22,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:22,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761026434] [2021-06-05 06:20:22,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761026434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:22,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918261153] [2021-06-05 06:20:22,316 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:22,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:20:22,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:22,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:20:22,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 06:20:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918261153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:22,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:22,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-06-05 06:20:22,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831840447] [2021-06-05 06:20:22,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:20:22,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:22,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:20:22,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:22,399 INFO L87 Difference]: Start difference. First operand 24224 states and 99159 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:22,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:22,587 INFO L93 Difference]: Finished difference Result 37062 states and 153499 transitions. [2021-06-05 06:20:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:20:22,587 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 06:20:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:22,686 INFO L225 Difference]: With dead ends: 37062 [2021-06-05 06:20:22,686 INFO L226 Difference]: Without dead ends: 37062 [2021-06-05 06:20:22,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:20:22,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37062 states. [2021-06-05 06:20:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37062 to 34305. [2021-06-05 06:20:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34305 states, 34304 states have (on average 4.138496968283582) internal successors, (141967), 34304 states have internal predecessors, (141967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34305 states to 34305 states and 141967 transitions. [2021-06-05 06:20:23,885 INFO L78 Accepts]: Start accepts. Automaton has 34305 states and 141967 transitions. Word has length 37 [2021-06-05 06:20:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:23,885 INFO L482 AbstractCegarLoop]: Abstraction has 34305 states and 141967 transitions. [2021-06-05 06:20:23,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:23,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34305 states and 141967 transitions. [2021-06-05 06:20:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:23,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:23,954 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:24,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:20:24,157 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:24,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash -774251319, now seen corresponding path program 19 times [2021-06-05 06:20:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:24,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757853926] [2021-06-05 06:20:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:24,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:24,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757853926] [2021-06-05 06:20:24,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757853926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:24,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961724468] [2021-06-05 06:20:24,376 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 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 06:20:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:24,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:20:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:24,537 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:24,537 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 35 treesize of output 17 [2021-06-05 06:20:24,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:24,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:24,547 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 06:20:24,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 06:20:24,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:24,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:24,714 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 50 treesize of output 14 [2021-06-05 06:20:24,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:24,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:24,723 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 06:20:24,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:20:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:24,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961724468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:24,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:24,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:20:24,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818956863] [2021-06-05 06:20:24,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:20:24,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:20:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:20:24,744 INFO L87 Difference]: Start difference. First operand 34305 states and 141967 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:25,671 INFO L93 Difference]: Finished difference Result 52372 states and 217820 transitions. [2021-06-05 06:20:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:20:25,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:20:25,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:25,865 INFO L225 Difference]: With dead ends: 52372 [2021-06-05 06:20:25,865 INFO L226 Difference]: Without dead ends: 52317 [2021-06-05 06:20:25,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:20:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52317 states. [2021-06-05 06:20:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52317 to 36002. [2021-06-05 06:20:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36002 states, 36001 states have (on average 4.139857226188162) internal successors, (149039), 36001 states have internal predecessors, (149039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36002 states to 36002 states and 149039 transitions. [2021-06-05 06:20:27,062 INFO L78 Accepts]: Start accepts. Automaton has 36002 states and 149039 transitions. Word has length 39 [2021-06-05 06:20:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:27,063 INFO L482 AbstractCegarLoop]: Abstraction has 36002 states and 149039 transitions. [2021-06-05 06:20:27,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36002 states and 149039 transitions. [2021-06-05 06:20:27,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:27,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:27,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:27,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:27,331 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1160268155, now seen corresponding path program 20 times [2021-06-05 06:20:27,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:27,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031529719] [2021-06-05 06:20:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:27,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:27,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031529719] [2021-06-05 06:20:27,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031529719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:27,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166561275] [2021-06-05 06:20:27,498 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 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 06:20:27,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:20:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:27,639 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:27,639 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 35 treesize of output 17 [2021-06-05 06:20:27,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:27,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:27,650 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 06:20:27,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 06:20:27,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:27,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:27,729 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 50 treesize of output 14 [2021-06-05 06:20:27,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:27,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:27,737 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 06:20:27,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:20:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:27,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166561275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:27,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:27,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:20:27,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566816810] [2021-06-05 06:20:27,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:20:27,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:20:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:20:27,762 INFO L87 Difference]: Start difference. First operand 36002 states and 149039 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:28,634 INFO L93 Difference]: Finished difference Result 55018 states and 227376 transitions. [2021-06-05 06:20:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:20:28,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:20:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:28,853 INFO L225 Difference]: With dead ends: 55018 [2021-06-05 06:20:28,853 INFO L226 Difference]: Without dead ends: 54826 [2021-06-05 06:20:28,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:20:28,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54826 states. [2021-06-05 06:20:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54826 to 36137. [2021-06-05 06:20:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36137 states, 36136 states have (on average 4.141825326544167) internal successors, (149669), 36136 states have internal predecessors, (149669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36137 states to 36137 states and 149669 transitions. [2021-06-05 06:20:29,906 INFO L78 Accepts]: Start accepts. Automaton has 36137 states and 149669 transitions. Word has length 39 [2021-06-05 06:20:29,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:29,907 INFO L482 AbstractCegarLoop]: Abstraction has 36137 states and 149669 transitions. [2021-06-05 06:20:29,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:29,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36137 states and 149669 transitions. [2021-06-05 06:20:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:29,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:29,974 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:30,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:20:30,175 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1833798575, now seen corresponding path program 21 times [2021-06-05 06:20:30,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:30,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135453726] [2021-06-05 06:20:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:30,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135453726] [2021-06-05 06:20:30,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135453726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:30,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125295809] [2021-06-05 06:20:30,345 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 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 06:20:30,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:20:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:20:30,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:30,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:30,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:30,582 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 50 [2021-06-05 06:20:30,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:30,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:30,622 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 06:20:30,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:77, output treesize:55 [2021-06-05 06:20:30,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:30,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:30,742 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-06-05 06:20:30,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:30,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:30,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:30,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-06-05 06:20:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:30,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125295809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:30,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:30,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:20:30,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320132100] [2021-06-05 06:20:30,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:20:30,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:20:30,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:20:30,813 INFO L87 Difference]: Start difference. First operand 36137 states and 149669 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:32,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:32,033 INFO L93 Difference]: Finished difference Result 62535 states and 260138 transitions. [2021-06-05 06:20:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:20:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:20:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:32,248 INFO L225 Difference]: With dead ends: 62535 [2021-06-05 06:20:32,249 INFO L226 Difference]: Without dead ends: 62480 [2021-06-05 06:20:32,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 515.1ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:20:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62480 states. [2021-06-05 06:20:33,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62480 to 36705. [2021-06-05 06:20:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36705 states, 36704 states have (on average 4.144861595466434) internal successors, (152133), 36704 states have internal predecessors, (152133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36705 states to 36705 states and 152133 transitions. [2021-06-05 06:20:33,457 INFO L78 Accepts]: Start accepts. Automaton has 36705 states and 152133 transitions. Word has length 39 [2021-06-05 06:20:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:33,458 INFO L482 AbstractCegarLoop]: Abstraction has 36705 states and 152133 transitions. [2021-06-05 06:20:33,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 36705 states and 152133 transitions. [2021-06-05 06:20:33,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:33,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:33,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:33,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:33,729 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:33,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:33,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1196210545, now seen corresponding path program 22 times [2021-06-05 06:20:33,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:33,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172466536] [2021-06-05 06:20:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:33,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:33,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172466536] [2021-06-05 06:20:33,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172466536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:33,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852801849] [2021-06-05 06:20:33,904 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 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 06:20:33,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:33,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:33,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:20:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:34,140 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:34,141 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 57 treesize of output 39 [2021-06-05 06:20:34,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:34,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:34,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:20:34,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:20:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:34,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:34,211 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 50 treesize of output 14 [2021-06-05 06:20:34,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:34,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:34,218 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 06:20:34,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:20:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852801849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:34,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:34,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:20:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393024950] [2021-06-05 06:20:34,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:20:34,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:34,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:20:34,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:20:34,236 INFO L87 Difference]: Start difference. First operand 36705 states and 152133 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 06:20:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:35,220 INFO L93 Difference]: Finished difference Result 64685 states and 269486 transitions. [2021-06-05 06:20:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:20:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 39 [2021-06-05 06:20:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:35,414 INFO L225 Difference]: With dead ends: 64685 [2021-06-05 06:20:35,414 INFO L226 Difference]: Without dead ends: 64630 [2021-06-05 06:20:35,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:20:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64630 states. [2021-06-05 06:20:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64630 to 36953. [2021-06-05 06:20:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36953 states, 36952 states have (on average 4.146595583459623) internal successors, (153225), 36952 states have internal predecessors, (153225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36953 states to 36953 states and 153225 transitions. [2021-06-05 06:20:36,592 INFO L78 Accepts]: Start accepts. Automaton has 36953 states and 153225 transitions. Word has length 39 [2021-06-05 06:20:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:36,593 INFO L482 AbstractCegarLoop]: Abstraction has 36953 states and 153225 transitions. [2021-06-05 06:20:36,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 06:20:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 36953 states and 153225 transitions. [2021-06-05 06:20:36,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:36,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:36,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:36,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 06:20:36,865 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:36,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:36,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1679763727, now seen corresponding path program 23 times [2021-06-05 06:20:36,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:36,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874669372] [2021-06-05 06:20:36,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:37,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:37,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874669372] [2021-06-05 06:20:37,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874669372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:37,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830017986] [2021-06-05 06:20:37,035 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 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 06:20:37,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:20:37,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:20:37,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:37,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:37,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:37,388 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 47 treesize of output 35 [2021-06-05 06:20:37,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:37,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:37,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:20:37,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:36 [2021-06-05 06:20:37,447 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:20:37,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:20:37,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:37,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:37,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:37,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 06:20:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:37,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830017986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:37,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:37,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:20:37,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673117797] [2021-06-05 06:20:37,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:20:37,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:20:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:20:37,526 INFO L87 Difference]: Start difference. First operand 36953 states and 153225 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:39,566 INFO L93 Difference]: Finished difference Result 100889 states and 419088 transitions. [2021-06-05 06:20:39,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:20:39,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:20:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:40,315 INFO L225 Difference]: With dead ends: 100889 [2021-06-05 06:20:40,315 INFO L226 Difference]: Without dead ends: 100543 [2021-06-05 06:20:40,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:20:40,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100543 states. [2021-06-05 06:20:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100543 to 41321. [2021-06-05 06:20:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41321 states, 41320 states have (on average 4.165488867376573) internal successors, (172118), 41320 states have internal predecessors, (172118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:41,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41321 states to 41321 states and 172118 transitions. [2021-06-05 06:20:41,755 INFO L78 Accepts]: Start accepts. Automaton has 41321 states and 172118 transitions. Word has length 39 [2021-06-05 06:20:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:41,755 INFO L482 AbstractCegarLoop]: Abstraction has 41321 states and 172118 transitions. [2021-06-05 06:20:41,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:41,755 INFO L276 IsEmpty]: Start isEmpty. Operand 41321 states and 172118 transitions. [2021-06-05 06:20:41,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:41,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:41,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:42,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 06:20:42,039 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash -202749415, now seen corresponding path program 24 times [2021-06-05 06:20:42,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:42,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356587544] [2021-06-05 06:20:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:42,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356587544] [2021-06-05 06:20:42,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356587544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:42,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782920004] [2021-06-05 06:20:42,218 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 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 06:20:42,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:20:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:42,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:20:42,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:42,391 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:42,391 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 41 treesize of output 23 [2021-06-05 06:20:42,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:42,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:42,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:20:42,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:34 [2021-06-05 06:20:42,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:42,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:42,500 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-06-05 06:20:42,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:42,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:42,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:20:42,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:21 [2021-06-05 06:20:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:42,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782920004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:42,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:42,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:20:42,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958720450] [2021-06-05 06:20:42,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:20:42,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:42,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:20:42,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:20:42,582 INFO L87 Difference]: Start difference. First operand 41321 states and 172118 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 06:20:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:44,049 INFO L93 Difference]: Finished difference Result 82777 states and 344914 transitions. [2021-06-05 06:20:44,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:20:44,050 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 39 [2021-06-05 06:20:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:44,336 INFO L225 Difference]: With dead ends: 82777 [2021-06-05 06:20:44,336 INFO L226 Difference]: Without dead ends: 82585 [2021-06-05 06:20:44,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:20:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82585 states. [2021-06-05 06:20:45,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82585 to 41297. [2021-06-05 06:20:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41297 states, 41296 states have (on average 4.166069352963968) internal successors, (172042), 41296 states have internal predecessors, (172042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41297 states to 41297 states and 172042 transitions. [2021-06-05 06:20:45,993 INFO L78 Accepts]: Start accepts. Automaton has 41297 states and 172042 transitions. Word has length 39 [2021-06-05 06:20:45,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:45,993 INFO L482 AbstractCegarLoop]: Abstraction has 41297 states and 172042 transitions. [2021-06-05 06:20:45,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 06:20:45,993 INFO L276 IsEmpty]: Start isEmpty. Operand 41297 states and 172042 transitions. [2021-06-05 06:20:46,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:46,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:46,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:46,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 06:20:46,282 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash 140092723, now seen corresponding path program 25 times [2021-06-05 06:20:46,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:46,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126338251] [2021-06-05 06:20:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:46,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:46,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126338251] [2021-06-05 06:20:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126338251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:46,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733441858] [2021-06-05 06:20:46,459 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 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 06:20:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:46,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:20:46,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:46,651 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:46,651 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 47 treesize of output 29 [2021-06-05 06:20:46,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:46,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:46,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:20:46,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:42 [2021-06-05 06:20:47,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:20:47,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:47,149 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 50 treesize of output 14 [2021-06-05 06:20:47,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:47,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:47,157 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 06:20:47,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:20:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:47,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733441858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:47,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:47,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:20:47,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523517603] [2021-06-05 06:20:47,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:20:47,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:47,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:20:47,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:20:47,187 INFO L87 Difference]: Start difference. First operand 41297 states and 172042 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:47,852 INFO L93 Difference]: Finished difference Result 60619 states and 253499 transitions. [2021-06-05 06:20:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:20:47,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:20:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:48,036 INFO L225 Difference]: With dead ends: 60619 [2021-06-05 06:20:48,036 INFO L226 Difference]: Without dead ends: 60564 [2021-06-05 06:20:48,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:20:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60564 states. [2021-06-05 06:20:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60564 to 43242. [2021-06-05 06:20:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43242 states, 43241 states have (on average 4.165791725445757) internal successors, (180133), 43241 states have internal predecessors, (180133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43242 states to 43242 states and 180133 transitions. [2021-06-05 06:20:49,321 INFO L78 Accepts]: Start accepts. Automaton has 43242 states and 180133 transitions. Word has length 39 [2021-06-05 06:20:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:49,321 INFO L482 AbstractCegarLoop]: Abstraction has 43242 states and 180133 transitions. [2021-06-05 06:20:49,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 43242 states and 180133 transitions. [2021-06-05 06:20:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:49,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:49,408 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:49,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 06:20:49,619 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:49,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:49,619 INFO L82 PathProgramCache]: Analyzing trace with hash -497495307, now seen corresponding path program 26 times [2021-06-05 06:20:49,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:49,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142760956] [2021-06-05 06:20:49,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:49,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:49,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142760956] [2021-06-05 06:20:49,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142760956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:49,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929883972] [2021-06-05 06:20:49,739 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 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 06:20:49,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:20:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:20:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:49,938 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:49,938 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 53 treesize of output 35 [2021-06-05 06:20:49,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:49,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:49,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:20:49,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2021-06-05 06:20:50,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:20:50,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:50,013 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:20:50,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:50,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:50,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:50,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:18 [2021-06-05 06:20:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:50,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929883972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:50,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:50,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 06:20:50,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342032822] [2021-06-05 06:20:50,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:20:50,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:50,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:20:50,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:20:50,079 INFO L87 Difference]: Start difference. First operand 43242 states and 180133 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:51,282 INFO L93 Difference]: Finished difference Result 77890 states and 325361 transitions. [2021-06-05 06:20:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:20:51,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:20:51,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:51,513 INFO L225 Difference]: With dead ends: 77890 [2021-06-05 06:20:51,513 INFO L226 Difference]: Without dead ends: 77835 [2021-06-05 06:20:51,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:20:51,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77835 states. [2021-06-05 06:20:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77835 to 43506. [2021-06-05 06:20:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43506 states, 43505 states have (on average 4.1671761866452135) internal successors, (181293), 43505 states have internal predecessors, (181293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43506 states to 43506 states and 181293 transitions. [2021-06-05 06:20:52,993 INFO L78 Accepts]: Start accepts. Automaton has 43506 states and 181293 transitions. Word has length 39 [2021-06-05 06:20:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:52,993 INFO L482 AbstractCegarLoop]: Abstraction has 43506 states and 181293 transitions. [2021-06-05 06:20:52,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 43506 states and 181293 transitions. [2021-06-05 06:20:53,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:53,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:53,073 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:53,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 06:20:53,274 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash 921497717, now seen corresponding path program 27 times [2021-06-05 06:20:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:53,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684365313] [2021-06-05 06:20:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:53,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:53,739 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 06:20:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:53,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684365313] [2021-06-05 06:20:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684365313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340366527] [2021-06-05 06:20:53,740 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 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 06:20:53,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:20:53,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:53,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:20:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:20:54,107 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:20:54,108 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 49 treesize of output 53 [2021-06-05 06:20:54,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:54,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:54,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:20:54,161 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:66, output treesize:46 [2021-06-05 06:20:54,237 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:20:54,237 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 44 treesize of output 40 [2021-06-05 06:20:54,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:20:54,249 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:20:54,249 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 9 treesize of output 3 [2021-06-05 06:20:54,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:20:54,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:20:54,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:20:54,269 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:74, output treesize:36 [2021-06-05 06:20:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:54,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340366527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:54,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:20:54,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:20:54,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860085748] [2021-06-05 06:20:54,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:20:54,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:20:54,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:20:54,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:20:54,358 INFO L87 Difference]: Start difference. First operand 43506 states and 181293 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:20:56,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:20:56,657 INFO L93 Difference]: Finished difference Result 138509 states and 583861 transitions. [2021-06-05 06:20:56,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:20:56,659 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 06:20:56,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:20:57,109 INFO L225 Difference]: With dead ends: 138509 [2021-06-05 06:20:57,109 INFO L226 Difference]: Without dead ends: 138399 [2021-06-05 06:20:57,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1419.1ms TimeCoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:20:57,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138399 states. [2021-06-05 06:20:59,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138399 to 46637. [2021-06-05 06:20:59,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46637 states, 46636 states have (on average 4.1785316064842615) internal successors, (194870), 46636 states have internal predecessors, (194870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:20:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46637 states to 46637 states and 194870 transitions. [2021-06-05 06:20:59,397 INFO L78 Accepts]: Start accepts. Automaton has 46637 states and 194870 transitions. Word has length 39 [2021-06-05 06:20:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:20:59,397 INFO L482 AbstractCegarLoop]: Abstraction has 46637 states and 194870 transitions. [2021-06-05 06:20:59,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:20:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 46637 states and 194870 transitions. [2021-06-05 06:20:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:20:59,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:20:59,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:20:59,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:20:59,694 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:20:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:20:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1615119669, now seen corresponding path program 28 times [2021-06-05 06:20:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:20:59,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438913031] [2021-06-05 06:20:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:20:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:20:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:20:59,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:20:59,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438913031] [2021-06-05 06:20:59,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438913031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:20:59,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485269290] [2021-06-05 06:20:59,858 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 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 06:20:59,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:20:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:20:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:20:59,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:00,138 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:00,139 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 57 treesize of output 39 [2021-06-05 06:21:00,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:00,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:00,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:21:00,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:00,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:00,209 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 50 treesize of output 14 [2021-06-05 06:21:00,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:00,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:00,217 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 06:21:00,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:21:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:00,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485269290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:00,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:00,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:21:00,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996313610] [2021-06-05 06:21:00,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:21:00,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:00,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:21:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:00,237 INFO L87 Difference]: Start difference. First operand 46637 states and 194870 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:01,291 INFO L93 Difference]: Finished difference Result 72544 states and 303851 transitions. [2021-06-05 06:21:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:21:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:01,593 INFO L225 Difference]: With dead ends: 72544 [2021-06-05 06:21:01,593 INFO L226 Difference]: Without dead ends: 72489 [2021-06-05 06:21:01,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72489 states. [2021-06-05 06:21:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72489 to 47265. [2021-06-05 06:21:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47265 states, 47264 states have (on average 4.180814150304672) internal successors, (197602), 47264 states have internal predecessors, (197602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47265 states to 47265 states and 197602 transitions. [2021-06-05 06:21:02,983 INFO L78 Accepts]: Start accepts. Automaton has 47265 states and 197602 transitions. Word has length 39 [2021-06-05 06:21:02,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:02,983 INFO L482 AbstractCegarLoop]: Abstraction has 47265 states and 197602 transitions. [2021-06-05 06:21:02,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:02,983 INFO L276 IsEmpty]: Start isEmpty. Operand 47265 states and 197602 transitions. [2021-06-05 06:21:03,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:03,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:03,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:03,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 06:21:03,276 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1260854603, now seen corresponding path program 29 times [2021-06-05 06:21:03,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:03,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695311697] [2021-06-05 06:21:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:03,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:03,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695311697] [2021-06-05 06:21:03,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695311697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336368057] [2021-06-05 06:21:03,407 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 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 06:21:03,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:21:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:03,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:21:03,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:03,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:03,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:03,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:03,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:03,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-06-05 06:21:03,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:03,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:03,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:03,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:56, output treesize:23 [2021-06-05 06:21:03,805 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:21:03,805 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 27 treesize of output 31 [2021-06-05 06:21:03,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:03,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:03,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:03,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:19 [2021-06-05 06:21:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:03,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336368057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:03,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:03,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:21:03,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652958608] [2021-06-05 06:21:03,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:21:03,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:03,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:21:03,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:21:03,878 INFO L87 Difference]: Start difference. First operand 47265 states and 197602 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:21:05,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:05,823 INFO L93 Difference]: Finished difference Result 86122 states and 360879 transitions. [2021-06-05 06:21:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:21:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 06:21:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:06,080 INFO L225 Difference]: With dead ends: 86122 [2021-06-05 06:21:06,080 INFO L226 Difference]: Without dead ends: 86012 [2021-06-05 06:21:06,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 799.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:21:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86012 states. [2021-06-05 06:21:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86012 to 48549. [2021-06-05 06:21:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48549 states, 48548 states have (on average 4.18571310867595) internal successors, (203208), 48548 states have internal predecessors, (203208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48549 states to 48549 states and 203208 transitions. [2021-06-05 06:21:07,696 INFO L78 Accepts]: Start accepts. Automaton has 48549 states and 203208 transitions. Word has length 39 [2021-06-05 06:21:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:07,696 INFO L482 AbstractCegarLoop]: Abstraction has 48549 states and 203208 transitions. [2021-06-05 06:21:07,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:21:07,696 INFO L276 IsEmpty]: Start isEmpty. Operand 48549 states and 203208 transitions. [2021-06-05 06:21:07,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:07,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:07,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:07,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 06:21:07,988 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:07,988 INFO L82 PathProgramCache]: Analyzing trace with hash -595147851, now seen corresponding path program 30 times [2021-06-05 06:21:07,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:07,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704509516] [2021-06-05 06:21:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:08,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704509516] [2021-06-05 06:21:08,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704509516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:08,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430005277] [2021-06-05 06:21:08,105 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 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 06:21:08,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:21:08,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:08,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:21:08,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:08,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:08,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:08,739 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 43 treesize of output 25 [2021-06-05 06:21:08,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:08,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:08,749 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 06:21:08,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:28 [2021-06-05 06:21:08,800 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:08,800 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 14 [2021-06-05 06:21:08,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:08,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:08,805 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 06:21:08,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:21:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:08,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430005277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:08,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:08,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:21:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699457678] [2021-06-05 06:21:08,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:21:08,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:21:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:08,830 INFO L87 Difference]: Start difference. First operand 48549 states and 203208 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:09,450 INFO L93 Difference]: Finished difference Result 65882 states and 276111 transitions. [2021-06-05 06:21:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:21:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:09,644 INFO L225 Difference]: With dead ends: 65882 [2021-06-05 06:21:09,644 INFO L226 Difference]: Without dead ends: 65827 [2021-06-05 06:21:09,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65827 states. [2021-06-05 06:21:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65827 to 48843. [2021-06-05 06:21:10,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48843 states, 48842 states have (on average 4.18611031489292) internal successors, (204458), 48842 states have internal predecessors, (204458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:11,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48843 states to 48843 states and 204458 transitions. [2021-06-05 06:21:11,028 INFO L78 Accepts]: Start accepts. Automaton has 48843 states and 204458 transitions. Word has length 39 [2021-06-05 06:21:11,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:11,028 INFO L482 AbstractCegarLoop]: Abstraction has 48843 states and 204458 transitions. [2021-06-05 06:21:11,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 48843 states and 204458 transitions. [2021-06-05 06:21:11,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:11,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:11,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:11,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:11,345 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:11,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1810207527, now seen corresponding path program 31 times [2021-06-05 06:21:11,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:11,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310431962] [2021-06-05 06:21:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:11,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310431962] [2021-06-05 06:21:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310431962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:11,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304392817] [2021-06-05 06:21:11,514 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 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 06:21:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:11,889 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 06:21:11,989 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:11,990 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 45 treesize of output 27 [2021-06-05 06:21:11,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:11,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:11,999 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 06:21:11,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:38 [2021-06-05 06:21:12,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:12,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:12,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:12,076 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 50 treesize of output 14 [2021-06-05 06:21:12,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:12,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:12,085 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 06:21:12,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:21:12,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:12,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304392817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:12,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:12,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:21:12,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416512551] [2021-06-05 06:21:12,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:21:12,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:12,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:21:12,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:12,113 INFO L87 Difference]: Start difference. First operand 48843 states and 204458 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:12,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:12,736 INFO L93 Difference]: Finished difference Result 68376 states and 284820 transitions. [2021-06-05 06:21:12,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:21:12,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:12,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:12,934 INFO L225 Difference]: With dead ends: 68376 [2021-06-05 06:21:12,935 INFO L226 Difference]: Without dead ends: 68184 [2021-06-05 06:21:12,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68184 states. [2021-06-05 06:21:14,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68184 to 49079. [2021-06-05 06:21:14,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49079 states, 49078 states have (on average 4.183137047149436) internal successors, (205300), 49078 states have internal predecessors, (205300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49079 states to 49079 states and 205300 transitions. [2021-06-05 06:21:14,388 INFO L78 Accepts]: Start accepts. Automaton has 49079 states and 205300 transitions. Word has length 39 [2021-06-05 06:21:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:14,389 INFO L482 AbstractCegarLoop]: Abstraction has 49079 states and 205300 transitions. [2021-06-05 06:21:14,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 49079 states and 205300 transitions. [2021-06-05 06:21:14,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:14,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:14,485 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:14,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 06:21:14,686 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1888715435, now seen corresponding path program 32 times [2021-06-05 06:21:14,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:14,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357607758] [2021-06-05 06:21:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:14,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:14,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357607758] [2021-06-05 06:21:14,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357607758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:14,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372796946] [2021-06-05 06:21:14,877 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 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 06:21:14,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:14,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:14,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:15,082 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:15,082 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 57 treesize of output 39 [2021-06-05 06:21:15,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:15,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:15,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:15,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:21:15,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:15,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:15,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:15,477 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 50 treesize of output 14 [2021-06-05 06:21:15,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:15,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:15,484 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 06:21:15,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:21:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:15,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372796946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:15,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:15,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:21:15,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849941425] [2021-06-05 06:21:15,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:21:15,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:15,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:21:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:15,543 INFO L87 Difference]: Start difference. First operand 49079 states and 205300 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:16,230 INFO L93 Difference]: Finished difference Result 71248 states and 297588 transitions. [2021-06-05 06:21:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:21:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:16,461 INFO L225 Difference]: With dead ends: 71248 [2021-06-05 06:21:16,461 INFO L226 Difference]: Without dead ends: 71088 [2021-06-05 06:21:16,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71088 states. [2021-06-05 06:21:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71088 to 49239. [2021-06-05 06:21:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49239 states, 49238 states have (on average 4.1832730817661155) internal successors, (205976), 49238 states have internal predecessors, (205976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49239 states to 49239 states and 205976 transitions. [2021-06-05 06:21:17,896 INFO L78 Accepts]: Start accepts. Automaton has 49239 states and 205976 transitions. Word has length 39 [2021-06-05 06:21:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:17,896 INFO L482 AbstractCegarLoop]: Abstraction has 49239 states and 205976 transitions. [2021-06-05 06:21:17,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 49239 states and 205976 transitions. [2021-06-05 06:21:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:18,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:18,003 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:18,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:18,203 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:18,203 INFO L82 PathProgramCache]: Analyzing trace with hash 410799271, now seen corresponding path program 33 times [2021-06-05 06:21:18,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:18,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661934209] [2021-06-05 06:21:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:18,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:18,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661934209] [2021-06-05 06:21:18,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661934209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:18,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818457543] [2021-06-05 06:21:18,380 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 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 06:21:18,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:18,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:18,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:21:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:18,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:18,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:18,640 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 55 [2021-06-05 06:21:18,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:18,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:18,991 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-06-05 06:21:18,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:18,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:58 [2021-06-05 06:21:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:19,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 06:21:19,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:19,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:19,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:19,106 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:21:19,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:19,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:19,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:19,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:96, output treesize:34 [2021-06-05 06:21:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:19,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818457543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:19,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:19,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:21:19,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488675158] [2021-06-05 06:21:19,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:21:19,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:19,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:21:19,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:21:19,261 INFO L87 Difference]: Start difference. First operand 49239 states and 205976 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:21,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:21,517 INFO L93 Difference]: Finished difference Result 97636 states and 405510 transitions. [2021-06-05 06:21:21,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:21:21,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:21,865 INFO L225 Difference]: With dead ends: 97636 [2021-06-05 06:21:21,865 INFO L226 Difference]: Without dead ends: 97472 [2021-06-05 06:21:21,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1280.6ms TimeCoverageRelationStatistics Valid=241, Invalid=1019, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:21:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97472 states. [2021-06-05 06:21:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97472 to 49475. [2021-06-05 06:21:23,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49475 states, 49474 states have (on average 4.184986053280511) internal successors, (207048), 49474 states have internal predecessors, (207048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49475 states to 49475 states and 207048 transitions. [2021-06-05 06:21:23,484 INFO L78 Accepts]: Start accepts. Automaton has 49475 states and 207048 transitions. Word has length 39 [2021-06-05 06:21:23,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:23,484 INFO L482 AbstractCegarLoop]: Abstraction has 49475 states and 207048 transitions. [2021-06-05 06:21:23,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 49475 states and 207048 transitions. [2021-06-05 06:21:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:23,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:23,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:23,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 06:21:23,789 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:23,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1378365419, now seen corresponding path program 34 times [2021-06-05 06:21:23,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:23,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256032921] [2021-06-05 06:21:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:23,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:23,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256032921] [2021-06-05 06:21:23,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256032921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:23,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390202307] [2021-06-05 06:21:23,955 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 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 06:21:23,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:23,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:23,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:23,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:24,139 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:24,139 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 57 treesize of output 39 [2021-06-05 06:21:24,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:24,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:24,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:21:24,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:24,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:24,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:24,196 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 50 treesize of output 14 [2021-06-05 06:21:24,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:24,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:24,203 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 06:21:24,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:21:24,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:24,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390202307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:24,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:24,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:21:24,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309706458] [2021-06-05 06:21:24,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:21:24,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:21:24,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:21:24,228 INFO L87 Difference]: Start difference. First operand 49475 states and 207048 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:25,523 INFO L93 Difference]: Finished difference Result 73622 states and 307761 transitions. [2021-06-05 06:21:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:21:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:25,773 INFO L225 Difference]: With dead ends: 73622 [2021-06-05 06:21:25,773 INFO L226 Difference]: Without dead ends: 73462 [2021-06-05 06:21:25,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:25,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73462 states. [2021-06-05 06:21:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73462 to 49315. [2021-06-05 06:21:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49315 states, 49314 states have (on average 4.184856227440483) internal successors, (206372), 49314 states have internal predecessors, (206372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49315 states to 49315 states and 206372 transitions. [2021-06-05 06:21:27,350 INFO L78 Accepts]: Start accepts. Automaton has 49315 states and 206372 transitions. Word has length 39 [2021-06-05 06:21:27,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:27,350 INFO L482 AbstractCegarLoop]: Abstraction has 49315 states and 206372 transitions. [2021-06-05 06:21:27,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 49315 states and 206372 transitions. [2021-06-05 06:21:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:27,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:27,459 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:27,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 06:21:27,660 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -388199381, now seen corresponding path program 35 times [2021-06-05 06:21:27,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:27,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065947493] [2021-06-05 06:21:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:27,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:27,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065947493] [2021-06-05 06:21:27,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065947493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:27,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920298447] [2021-06-05 06:21:27,794 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 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 06:21:27,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:21:27,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:27,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:28,006 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-06-05 06:21:28,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:28,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:28,039 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 06:21:28,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:33 [2021-06-05 06:21:28,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:21:28,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:28,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:28,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:28,156 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 06:21:28,161 INFO L550 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:28,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:28,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:28,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:63, output treesize:33 [2021-06-05 06:21:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:28,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920298447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:28,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:28,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-05 06:21:28,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132580938] [2021-06-05 06:21:28,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:21:28,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:28,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:21:28,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:21:28,265 INFO L87 Difference]: Start difference. First operand 49315 states and 206372 transitions. Second operand has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 20 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 06:21:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:30,865 INFO L93 Difference]: Finished difference Result 122187 states and 509230 transitions. [2021-06-05 06:21:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:21:30,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 20 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 39 [2021-06-05 06:21:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:31,725 INFO L225 Difference]: With dead ends: 122187 [2021-06-05 06:21:31,725 INFO L226 Difference]: Without dead ends: 121878 [2021-06-05 06:21:31,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1298.7ms TimeCoverageRelationStatistics Valid=288, Invalid=1782, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 06:21:31,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121878 states. [2021-06-05 06:21:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121878 to 51630. [2021-06-05 06:21:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51630 states, 51629 states have (on average 4.188982935946852) internal successors, (216273), 51629 states have internal predecessors, (216273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51630 states to 51630 states and 216273 transitions. [2021-06-05 06:21:33,549 INFO L78 Accepts]: Start accepts. Automaton has 51630 states and 216273 transitions. Word has length 39 [2021-06-05 06:21:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:33,549 INFO L482 AbstractCegarLoop]: Abstraction has 51630 states and 216273 transitions. [2021-06-05 06:21:33,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 20 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 06:21:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 51630 states and 216273 transitions. [2021-06-05 06:21:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:33,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:33,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:33,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:33,859 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash 411273525, now seen corresponding path program 36 times [2021-06-05 06:21:33,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:33,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708762002] [2021-06-05 06:21:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:33,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708762002] [2021-06-05 06:21:33,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708762002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:33,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586038953] [2021-06-05 06:21:33,977 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 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 06:21:34,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:21:34,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:34,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:34,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:34,126 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:21:34,127 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 31 treesize of output 35 [2021-06-05 06:21:34,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:34,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:34,150 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 06:21:34,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:30 [2021-06-05 06:21:34,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:34,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:34,302 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:21:34,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:34,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:34,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:34,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:21:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:34,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586038953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:34,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:34,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:21:34,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843803457] [2021-06-05 06:21:34,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:21:34,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:21:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:21:34,365 INFO L87 Difference]: Start difference. First operand 51630 states and 216273 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:35,637 INFO L93 Difference]: Finished difference Result 77271 states and 323197 transitions. [2021-06-05 06:21:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:35,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:35,880 INFO L225 Difference]: With dead ends: 77271 [2021-06-05 06:21:35,880 INFO L226 Difference]: Without dead ends: 77216 [2021-06-05 06:21:35,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:21:35,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77216 states. [2021-06-05 06:21:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77216 to 52019. [2021-06-05 06:21:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52019 states, 52018 states have (on average 4.185724172401861) internal successors, (217733), 52018 states have internal predecessors, (217733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52019 states to 52019 states and 217733 transitions. [2021-06-05 06:21:37,549 INFO L78 Accepts]: Start accepts. Automaton has 52019 states and 217733 transitions. Word has length 39 [2021-06-05 06:21:37,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:37,549 INFO L482 AbstractCegarLoop]: Abstraction has 52019 states and 217733 transitions. [2021-06-05 06:21:37,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:37,549 INFO L276 IsEmpty]: Start isEmpty. Operand 52019 states and 217733 transitions. [2021-06-05 06:21:37,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:37,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:37,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:37,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 06:21:37,862 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:37,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:37,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1949174297, now seen corresponding path program 37 times [2021-06-05 06:21:37,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:37,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125852507] [2021-06-05 06:21:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:38,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:38,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125852507] [2021-06-05 06:21:38,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125852507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:38,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568030901] [2021-06-05 06:21:38,001 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 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 06:21:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:38,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:38,108 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 35 treesize of output 17 [2021-06-05 06:21:38,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:38,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:38,113 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 06:21:38,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:14 [2021-06-05 06:21:38,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:38,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:38,195 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 50 treesize of output 14 [2021-06-05 06:21:38,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:38,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:38,202 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 06:21:38,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:21:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:38,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568030901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:38,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:38,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:21:38,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055755293] [2021-06-05 06:21:38,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:21:38,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:38,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:21:38,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:21:38,230 INFO L87 Difference]: Start difference. First operand 52019 states and 217733 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:39,568 INFO L93 Difference]: Finished difference Result 69922 states and 291315 transitions. [2021-06-05 06:21:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:21:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:39,786 INFO L225 Difference]: With dead ends: 69922 [2021-06-05 06:21:39,786 INFO L226 Difference]: Without dead ends: 69730 [2021-06-05 06:21:39,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69730 states. [2021-06-05 06:21:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69730 to 51940. [2021-06-05 06:21:41,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51940 states, 51939 states have (on average 4.1844086332043355) internal successors, (217334), 51939 states have internal predecessors, (217334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51940 states to 51940 states and 217334 transitions. [2021-06-05 06:21:41,449 INFO L78 Accepts]: Start accepts. Automaton has 51940 states and 217334 transitions. Word has length 39 [2021-06-05 06:21:41,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:41,450 INFO L482 AbstractCegarLoop]: Abstraction has 51940 states and 217334 transitions. [2021-06-05 06:21:41,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:41,450 INFO L276 IsEmpty]: Start isEmpty. Operand 51940 states and 217334 transitions. [2021-06-05 06:21:41,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:41,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:41,587 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:41,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:41,810 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:41,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash -2136317753, now seen corresponding path program 38 times [2021-06-05 06:21:41,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:41,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169634147] [2021-06-05 06:21:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:41,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:41,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169634147] [2021-06-05 06:21:41,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169634147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:41,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857645690] [2021-06-05 06:21:41,937 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 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 06:21:41,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:21:41,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:21:41,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:42,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:42,064 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 35 treesize of output 17 [2021-06-05 06:21:42,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:42,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:42,072 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 06:21:42,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:23 [2021-06-05 06:21:42,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:42,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:42,182 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:21:42,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:42,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:42,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:42,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:21:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:42,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857645690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:42,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:42,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2021-06-05 06:21:42,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219133323] [2021-06-05 06:21:42,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:21:42,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:21:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:42,242 INFO L87 Difference]: Start difference. First operand 51940 states and 217334 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:43,568 INFO L93 Difference]: Finished difference Result 73581 states and 308075 transitions. [2021-06-05 06:21:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:21:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:43,802 INFO L225 Difference]: With dead ends: 73581 [2021-06-05 06:21:43,802 INFO L226 Difference]: Without dead ends: 73526 [2021-06-05 06:21:43,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:21:43,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73526 states. [2021-06-05 06:21:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73526 to 52221. [2021-06-05 06:21:45,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52221 states, 52220 states have (on average 4.184278054385293) internal successors, (218503), 52220 states have internal predecessors, (218503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52221 states to 52221 states and 218503 transitions. [2021-06-05 06:21:45,386 INFO L78 Accepts]: Start accepts. Automaton has 52221 states and 218503 transitions. Word has length 39 [2021-06-05 06:21:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:45,386 INFO L482 AbstractCegarLoop]: Abstraction has 52221 states and 218503 transitions. [2021-06-05 06:21:45,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52221 states and 218503 transitions. [2021-06-05 06:21:45,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:45,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:45,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:45,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 06:21:45,700 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -201798279, now seen corresponding path program 39 times [2021-06-05 06:21:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:45,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715166537] [2021-06-05 06:21:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:45,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:45,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:45,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715166537] [2021-06-05 06:21:45,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715166537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:45,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911608829] [2021-06-05 06:21:45,829 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 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 06:21:45,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:21:45,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:21:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:45,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:46,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,005 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2021-06-05 06:21:46,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:46,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,034 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 06:21:46,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:39 [2021-06-05 06:21:46,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:46,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,166 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:21:46,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:21:46,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:46,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:21:46,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:21:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:46,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911608829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:46,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:46,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:21:46,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970571931] [2021-06-05 06:21:46,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:21:46,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:21:46,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:21:46,247 INFO L87 Difference]: Start difference. First operand 52221 states and 218503 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 06:21:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:47,589 INFO L93 Difference]: Finished difference Result 73627 states and 306879 transitions. [2021-06-05 06:21:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:21:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 39 [2021-06-05 06:21:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:47,808 INFO L225 Difference]: With dead ends: 73627 [2021-06-05 06:21:47,808 INFO L226 Difference]: Without dead ends: 73435 [2021-06-05 06:21:47,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 563.2ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:21:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73435 states. [2021-06-05 06:21:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73435 to 52098. [2021-06-05 06:21:49,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52098 states, 52097 states have (on average 4.1840796974873795) internal successors, (217978), 52097 states have internal predecessors, (217978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52098 states to 52098 states and 217978 transitions. [2021-06-05 06:21:49,330 INFO L78 Accepts]: Start accepts. Automaton has 52098 states and 217978 transitions. Word has length 39 [2021-06-05 06:21:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:49,330 INFO L482 AbstractCegarLoop]: Abstraction has 52098 states and 217978 transitions. [2021-06-05 06:21:49,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 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 06:21:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 52098 states and 217978 transitions. [2021-06-05 06:21:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:49,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:49,442 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:49,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:49,643 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash 471732141, now seen corresponding path program 40 times [2021-06-05 06:21:49,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:49,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772905578] [2021-06-05 06:21:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:49,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772905578] [2021-06-05 06:21:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772905578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100494944] [2021-06-05 06:21:49,755 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 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 06:21:49,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:21:49,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:49,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:21:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:49,924 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:49,925 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 52 treesize of output 30 [2021-06-05 06:21:49,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:49,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:49,932 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 06:21:49,932 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 06:21:49,997 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:49,997 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 14 [2021-06-05 06:21:49,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:50,001 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:50,002 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 06:21:50,002 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:21:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:50,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100494944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:50,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:50,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:21:50,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817303014] [2021-06-05 06:21:50,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:21:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:21:50,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:50,020 INFO L87 Difference]: Start difference. First operand 52098 states and 217978 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 06:21:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:50,970 INFO L93 Difference]: Finished difference Result 67945 states and 284799 transitions. [2021-06-05 06:21:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 06:21:50,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 39 [2021-06-05 06:21:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:51,180 INFO L225 Difference]: With dead ends: 67945 [2021-06-05 06:21:51,181 INFO L226 Difference]: Without dead ends: 67890 [2021-06-05 06:21:51,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67890 states. [2021-06-05 06:21:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67890 to 52534. [2021-06-05 06:21:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52534 states, 52533 states have (on average 4.185864123503322) internal successors, (219896), 52533 states have internal predecessors, (219896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52534 states to 52534 states and 219896 transitions. [2021-06-05 06:21:52,655 INFO L78 Accepts]: Start accepts. Automaton has 52534 states and 219896 transitions. Word has length 39 [2021-06-05 06:21:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:52,655 INFO L482 AbstractCegarLoop]: Abstraction has 52534 states and 219896 transitions. [2021-06-05 06:21:52,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 06:21:52,655 INFO L276 IsEmpty]: Start isEmpty. Operand 52534 states and 219896 transitions. [2021-06-05 06:21:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:52,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:52,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:52,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:52,967 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:52,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:52,967 INFO L82 PathProgramCache]: Analyzing trace with hash -165855889, now seen corresponding path program 41 times [2021-06-05 06:21:52,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:52,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233432045] [2021-06-05 06:21:52,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:53,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233432045] [2021-06-05 06:21:53,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233432045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:53,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826968060] [2021-06-05 06:21:53,070 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 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 06:21:53,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:21:53,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:21:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:53,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:53,322 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 68 treesize of output 40 [2021-06-05 06:21:53,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:53,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:53,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:21:53,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:91, output treesize:47 [2021-06-05 06:21:53,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:21:53,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:21:53,403 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 44 treesize of output 14 [2021-06-05 06:21:53,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:53,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:53,410 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 06:21:53,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:7 [2021-06-05 06:21:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:53,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826968060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:53,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:53,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:21:53,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177187307] [2021-06-05 06:21:53,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:21:53,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:53,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:21:53,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:21:53,424 INFO L87 Difference]: Start difference. First operand 52534 states and 219896 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:54,769 INFO L93 Difference]: Finished difference Result 87255 states and 363244 transitions. [2021-06-05 06:21:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:21:54,770 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:55,033 INFO L225 Difference]: With dead ends: 87255 [2021-06-05 06:21:55,034 INFO L226 Difference]: Without dead ends: 87095 [2021-06-05 06:21:55,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 428.9ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:21:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87095 states. [2021-06-05 06:21:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87095 to 55287. [2021-06-05 06:21:56,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55287 states, 55286 states have (on average 4.180732916108961) internal successors, (231136), 55286 states have internal predecessors, (231136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55287 states to 55287 states and 231136 transitions. [2021-06-05 06:21:56,773 INFO L78 Accepts]: Start accepts. Automaton has 55287 states and 231136 transitions. Word has length 39 [2021-06-05 06:21:56,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:21:56,773 INFO L482 AbstractCegarLoop]: Abstraction has 55287 states and 231136 transitions. [2021-06-05 06:21:56,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 55287 states and 231136 transitions. [2021-06-05 06:21:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:21:57,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:21:57,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:21:57,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:21:57,517 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:21:57,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:21:57,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1253137135, now seen corresponding path program 42 times [2021-06-05 06:21:57,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:21:57,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802044816] [2021-06-05 06:21:57,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:21:57,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:21:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:57,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:21:57,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802044816] [2021-06-05 06:21:57,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802044816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:57,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112462122] [2021-06-05 06:21:57,637 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 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 06:21:57,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:21:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:21:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:21:57,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:21:57,819 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:57,819 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 53 treesize of output 35 [2021-06-05 06:21:57,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:57,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:57,824 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 06:21:57,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 06:21:57,845 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:21:57,846 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 14 [2021-06-05 06:21:57,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:21:57,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:21:57,849 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 06:21:57,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:21:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:21:57,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112462122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:21:57,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:21:57,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:21:57,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771502248] [2021-06-05 06:21:57,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:21:57,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:21:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:21:57,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:21:57,868 INFO L87 Difference]: Start difference. First operand 55287 states and 231136 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:21:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:21:58,610 INFO L93 Difference]: Finished difference Result 78720 states and 329330 transitions. [2021-06-05 06:21:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:21:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:21:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:21:58,845 INFO L225 Difference]: With dead ends: 78720 [2021-06-05 06:21:58,845 INFO L226 Difference]: Without dead ends: 78665 [2021-06-05 06:21:58,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:21:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78665 states. [2021-06-05 06:22:00,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78665 to 54803. [2021-06-05 06:22:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54803 states, 54802 states have (on average 4.178497135141053) internal successors, (228990), 54802 states have internal predecessors, (228990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:00,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54803 states to 54803 states and 228990 transitions. [2021-06-05 06:22:00,977 INFO L78 Accepts]: Start accepts. Automaton has 54803 states and 228990 transitions. Word has length 39 [2021-06-05 06:22:00,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:00,977 INFO L482 AbstractCegarLoop]: Abstraction has 54803 states and 228990 transitions. [2021-06-05 06:22:00,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54803 states and 228990 transitions. [2021-06-05 06:22:01,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:01,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:01,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:01,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:01,300 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:01,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:01,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1564815849, now seen corresponding path program 43 times [2021-06-05 06:22:01,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:01,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454408068] [2021-06-05 06:22:01,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:01,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:01,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454408068] [2021-06-05 06:22:01,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454408068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:01,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396602743] [2021-06-05 06:22:01,443 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 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 06:22:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:01,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:01,621 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:01,622 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 45 treesize of output 27 [2021-06-05 06:22:01,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:01,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:01,630 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 06:22:01,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:35 [2021-06-05 06:22:01,672 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:01,672 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 14 [2021-06-05 06:22:01,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:01,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:01,677 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 06:22:01,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:22:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:01,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396602743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:01,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:01,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:22:01,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298741785] [2021-06-05 06:22:01,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:22:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:22:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:01,699 INFO L87 Difference]: Start difference. First operand 54803 states and 228990 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:02,207 INFO L93 Difference]: Finished difference Result 74247 states and 308762 transitions. [2021-06-05 06:22:02,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:22:02,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:02,420 INFO L225 Difference]: With dead ends: 74247 [2021-06-05 06:22:02,420 INFO L226 Difference]: Without dead ends: 74055 [2021-06-05 06:22:02,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74055 states. [2021-06-05 06:22:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74055 to 54939. [2021-06-05 06:22:03,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54939 states, 54938 states have (on average 4.176744694018712) internal successors, (229462), 54938 states have internal predecessors, (229462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54939 states to 54939 states and 229462 transitions. [2021-06-05 06:22:04,519 INFO L78 Accepts]: Start accepts. Automaton has 54939 states and 229462 transitions. Word has length 39 [2021-06-05 06:22:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:04,520 INFO L482 AbstractCegarLoop]: Abstraction has 54939 states and 229462 transitions. [2021-06-05 06:22:04,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 54939 states and 229462 transitions. [2021-06-05 06:22:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:04,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:04,645 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:04,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 06:22:04,846 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash 656190949, now seen corresponding path program 44 times [2021-06-05 06:22:04,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:04,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380967853] [2021-06-05 06:22:04,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:04,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:04,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380967853] [2021-06-05 06:22:04,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380967853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:04,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074478903] [2021-06-05 06:22:04,999 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 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 06:22:05,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:05,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:05,194 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:05,194 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 53 treesize of output 35 [2021-06-05 06:22:05,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:05,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:05,199 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 06:22:05,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 06:22:05,221 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:05,222 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 14 [2021-06-05 06:22:05,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:05,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:05,225 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 06:22:05,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:22:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:05,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074478903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:05,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:05,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:22:05,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837855711] [2021-06-05 06:22:05,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:22:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:05,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:22:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:05,252 INFO L87 Difference]: Start difference. First operand 54939 states and 229462 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:05,918 INFO L93 Difference]: Finished difference Result 76321 states and 317736 transitions. [2021-06-05 06:22:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:22:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:06,156 INFO L225 Difference]: With dead ends: 76321 [2021-06-05 06:22:06,156 INFO L226 Difference]: Without dead ends: 76231 [2021-06-05 06:22:06,156 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:22:06,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76231 states. [2021-06-05 06:22:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76231 to 54927. [2021-06-05 06:22:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54927 states, 54926 states have (on average 4.177912099916251) internal successors, (229476), 54926 states have internal predecessors, (229476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54927 states to 54927 states and 229476 transitions. [2021-06-05 06:22:08,313 INFO L78 Accepts]: Start accepts. Automaton has 54927 states and 229476 transitions. Word has length 39 [2021-06-05 06:22:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:08,314 INFO L482 AbstractCegarLoop]: Abstraction has 54927 states and 229476 transitions. [2021-06-05 06:22:08,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:08,314 INFO L276 IsEmpty]: Start isEmpty. Operand 54927 states and 229476 transitions. [2021-06-05 06:22:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:08,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:08,435 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:08,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:08,637 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:08,637 INFO L82 PathProgramCache]: Analyzing trace with hash -956397167, now seen corresponding path program 45 times [2021-06-05 06:22:08,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:08,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028092095] [2021-06-05 06:22:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:08,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028092095] [2021-06-05 06:22:08,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028092095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:08,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800335349] [2021-06-05 06:22:08,766 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:08,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:22:08,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:08,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:22:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:08,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:08,915 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2021-06-05 06:22:08,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:08,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:08,948 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 06:22:08,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:40 [2021-06-05 06:22:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:09,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:09,080 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:22:09,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:09,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:09,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:09,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:18 [2021-06-05 06:22:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:09,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800335349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:09,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:09,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 06:22:09,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781748049] [2021-06-05 06:22:09,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:22:09,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:09,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:22:09,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:22:09,149 INFO L87 Difference]: Start difference. First operand 54927 states and 229476 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 06:22:10,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:10,171 INFO L93 Difference]: Finished difference Result 95632 states and 403093 transitions. [2021-06-05 06:22:10,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:22:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 39 [2021-06-05 06:22:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:10,930 INFO L225 Difference]: With dead ends: 95632 [2021-06-05 06:22:10,930 INFO L226 Difference]: Without dead ends: 95577 [2021-06-05 06:22:10,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:22:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95577 states. [2021-06-05 06:22:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95577 to 55552. [2021-06-05 06:22:12,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55552 states, 55551 states have (on average 4.183255026912207) internal successors, (232384), 55551 states have internal predecessors, (232384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55552 states to 55552 states and 232384 transitions. [2021-06-05 06:22:12,639 INFO L78 Accepts]: Start accepts. Automaton has 55552 states and 232384 transitions. Word has length 39 [2021-06-05 06:22:12,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:12,639 INFO L482 AbstractCegarLoop]: Abstraction has 55552 states and 232384 transitions. [2021-06-05 06:22:12,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 16 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 06:22:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 55552 states and 232384 transitions. [2021-06-05 06:22:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:12,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:12,759 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:12,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 06:22:12,960 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash 978122307, now seen corresponding path program 46 times [2021-06-05 06:22:12,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:12,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182372088] [2021-06-05 06:22:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:13,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182372088] [2021-06-05 06:22:13,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182372088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:13,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225476311] [2021-06-05 06:22:13,101 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 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 06:22:13,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:13,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:13,225 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:13,226 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 35 treesize of output 17 [2021-06-05 06:22:13,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:13,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:13,234 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 06:22:13,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:28 [2021-06-05 06:22:13,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:13,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:13,308 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 50 treesize of output 14 [2021-06-05 06:22:13,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:13,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:13,315 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 06:22:13,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:22:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:13,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225476311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:13,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:13,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:22:13,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125604482] [2021-06-05 06:22:13,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:22:13,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:13,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:22:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:22:13,339 INFO L87 Difference]: Start difference. First operand 55552 states and 232384 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:14,528 INFO L93 Difference]: Finished difference Result 79462 states and 332227 transitions. [2021-06-05 06:22:14,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:22:14,528 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:14,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:14,782 INFO L225 Difference]: With dead ends: 79462 [2021-06-05 06:22:14,782 INFO L226 Difference]: Without dead ends: 79270 [2021-06-05 06:22:14,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 208.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:22:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79270 states. [2021-06-05 06:22:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79270 to 55553. [2021-06-05 06:22:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55553 states, 55552 states have (on average 4.184367799539171) internal successors, (232450), 55552 states have internal predecessors, (232450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55553 states to 55553 states and 232450 transitions. [2021-06-05 06:22:16,380 INFO L78 Accepts]: Start accepts. Automaton has 55553 states and 232450 transitions. Word has length 39 [2021-06-05 06:22:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:16,380 INFO L482 AbstractCegarLoop]: Abstraction has 55553 states and 232450 transitions. [2021-06-05 06:22:16,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 55553 states and 232450 transitions. [2021-06-05 06:22:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:16,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:16,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:16,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 06:22:16,706 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:16,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1651652727, now seen corresponding path program 47 times [2021-06-05 06:22:16,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:16,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851698597] [2021-06-05 06:22:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:16,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:16,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851698597] [2021-06-05 06:22:16,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851698597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:16,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853773760] [2021-06-05 06:22:16,841 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 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 06:22:16,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:22:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:22:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:17,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:17,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:17,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:17,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-05 06:22:17,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:17,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:17,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:17,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:57, output treesize:27 [2021-06-05 06:22:17,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:17,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:17,286 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 17 treesize of output 9 [2021-06-05 06:22:17,288 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:17,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:17,294 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 06:22:17,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:3 [2021-06-05 06:22:17,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:17,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853773760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:17,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:17,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:22:17,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942151138] [2021-06-05 06:22:17,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:22:17,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:17,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:22:17,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:22:17,311 INFO L87 Difference]: Start difference. First operand 55553 states and 232450 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:18,706 INFO L93 Difference]: Finished difference Result 90346 states and 380016 transitions. [2021-06-05 06:22:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:22:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:18,983 INFO L225 Difference]: With dead ends: 90346 [2021-06-05 06:22:18,983 INFO L226 Difference]: Without dead ends: 90291 [2021-06-05 06:22:18,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:22:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90291 states. [2021-06-05 06:22:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90291 to 56477. [2021-06-05 06:22:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56477 states, 56476 states have (on average 4.187619519796019) internal successors, (236500), 56476 states have internal predecessors, (236500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56477 states to 56477 states and 236500 transitions. [2021-06-05 06:22:20,649 INFO L78 Accepts]: Start accepts. Automaton has 56477 states and 236500 transitions. Word has length 39 [2021-06-05 06:22:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:20,649 INFO L482 AbstractCegarLoop]: Abstraction has 56477 states and 236500 transitions. [2021-06-05 06:22:20,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:20,650 INFO L276 IsEmpty]: Start isEmpty. Operand 56477 states and 236500 transitions. [2021-06-05 06:22:20,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:20,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:20,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:20,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 06:22:20,981 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:20,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:20,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1014064697, now seen corresponding path program 48 times [2021-06-05 06:22:20,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:20,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686611285] [2021-06-05 06:22:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:21,111 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:21,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:21,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686611285] [2021-06-05 06:22:21,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686611285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:21,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902544460] [2021-06-05 06:22:21,111 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 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 06:22:21,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:22:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:22:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:21,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:21,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:21,764 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 54 [2021-06-05 06:22:21,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:21,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:21,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:21,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:86, output treesize:58 [2021-06-05 06:22:21,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:21,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:21,893 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:22:21,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:21,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:21,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:21,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:22:21,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:21,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902544460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:21,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:21,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:22:21,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848534047] [2021-06-05 06:22:21,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:22:21,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:22:21,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:22:21,965 INFO L87 Difference]: Start difference. First operand 56477 states and 236500 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:23,174 INFO L93 Difference]: Finished difference Result 95941 states and 404044 transitions. [2021-06-05 06:22:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 06:22:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:23,851 INFO L225 Difference]: With dead ends: 95941 [2021-06-05 06:22:23,852 INFO L226 Difference]: Without dead ends: 95886 [2021-06-05 06:22:23,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 581.7ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:22:23,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95886 states. [2021-06-05 06:22:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95886 to 56601. [2021-06-05 06:22:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56601 states, 56600 states have (on average 4.1906713780918725) internal successors, (237192), 56600 states have internal predecessors, (237192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56601 states to 56601 states and 237192 transitions. [2021-06-05 06:22:25,500 INFO L78 Accepts]: Start accepts. Automaton has 56601 states and 237192 transitions. Word has length 39 [2021-06-05 06:22:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:25,501 INFO L482 AbstractCegarLoop]: Abstraction has 56601 states and 237192 transitions. [2021-06-05 06:22:25,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 56601 states and 237192 transitions. [2021-06-05 06:22:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:25,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:25,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:25,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 06:22:25,822 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:25,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:25,822 INFO L82 PathProgramCache]: Analyzing trace with hash -384895263, now seen corresponding path program 49 times [2021-06-05 06:22:25,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:25,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732196489] [2021-06-05 06:22:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:25,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:25,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732196489] [2021-06-05 06:22:25,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732196489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:25,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495783512] [2021-06-05 06:22:25,985 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 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 06:22:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:26,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:26,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:26,152 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:26,152 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 45 treesize of output 27 [2021-06-05 06:22:26,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:26,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:26,159 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 06:22:26,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:38 [2021-06-05 06:22:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:26,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:26,211 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 50 treesize of output 14 [2021-06-05 06:22:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:26,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:26,217 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 06:22:26,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:22:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:26,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495783512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:26,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:26,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:26,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751931965] [2021-06-05 06:22:26,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:26,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:26,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:26,238 INFO L87 Difference]: Start difference. First operand 56601 states and 237192 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:27,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:27,214 INFO L93 Difference]: Finished difference Result 80232 states and 335489 transitions. [2021-06-05 06:22:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:22:27,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:27,507 INFO L225 Difference]: With dead ends: 80232 [2021-06-05 06:22:27,507 INFO L226 Difference]: Without dead ends: 80040 [2021-06-05 06:22:27,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80040 states. [2021-06-05 06:22:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80040 to 56777. [2021-06-05 06:22:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56777 states, 56776 states have (on average 4.188812174158095) internal successors, (237824), 56776 states have internal predecessors, (237824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56777 states to 56777 states and 237824 transitions. [2021-06-05 06:22:29,145 INFO L78 Accepts]: Start accepts. Automaton has 56777 states and 237824 transitions. Word has length 39 [2021-06-05 06:22:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:29,145 INFO L482 AbstractCegarLoop]: Abstraction has 56777 states and 237824 transitions. [2021-06-05 06:22:29,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:29,145 INFO L276 IsEmpty]: Start isEmpty. Operand 56777 states and 237824 transitions. [2021-06-05 06:22:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:29,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:29,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:29,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:29,458 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash -980939597, now seen corresponding path program 50 times [2021-06-05 06:22:29,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:29,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107180327] [2021-06-05 06:22:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:29,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107180327] [2021-06-05 06:22:29,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107180327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:29,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146159915] [2021-06-05 06:22:29,607 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 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 06:22:29,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:29,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:29,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:22:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:29,764 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:29,764 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 62 treesize of output 40 [2021-06-05 06:22:29,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:29,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:29,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:42 [2021-06-05 06:22:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:29,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:29,804 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 44 treesize of output 14 [2021-06-05 06:22:29,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:29,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:29,810 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 06:22:29,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:7 [2021-06-05 06:22:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:29,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146159915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:29,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:29,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885985429] [2021-06-05 06:22:29,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:29,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:29,833 INFO L87 Difference]: Start difference. First operand 56777 states and 237824 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:30,894 INFO L93 Difference]: Finished difference Result 83188 states and 348995 transitions. [2021-06-05 06:22:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:22:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:31,166 INFO L225 Difference]: With dead ends: 83188 [2021-06-05 06:22:31,166 INFO L226 Difference]: Without dead ends: 83028 [2021-06-05 06:22:31,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:22:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83028 states. [2021-06-05 06:22:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83028 to 56925. [2021-06-05 06:22:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56925 states, 56924 states have (on average 4.1900077296043845) internal successors, (238512), 56924 states have internal predecessors, (238512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:32,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56925 states to 56925 states and 238512 transitions. [2021-06-05 06:22:32,765 INFO L78 Accepts]: Start accepts. Automaton has 56925 states and 238512 transitions. Word has length 39 [2021-06-05 06:22:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:32,765 INFO L482 AbstractCegarLoop]: Abstraction has 56925 states and 238512 transitions. [2021-06-05 06:22:32,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:32,766 INFO L276 IsEmpty]: Start isEmpty. Operand 56925 states and 238512 transitions. [2021-06-05 06:22:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:32,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:32,887 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:33,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 06:22:33,089 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1836111535, now seen corresponding path program 51 times [2021-06-05 06:22:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:33,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165881698] [2021-06-05 06:22:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:33,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:33,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:33,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:33,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165881698] [2021-06-05 06:22:33,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165881698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:33,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989735633] [2021-06-05 06:22:33,247 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:33,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:22:33,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:22:33,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:33,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:33,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:33,500 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2021-06-05 06:22:33,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:33,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:33,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:33,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:86, output treesize:58 [2021-06-05 06:22:33,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:33,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:33,619 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:22:33,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:22:33,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:33,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 06:22:33,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:33,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:33,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:22:33,659 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:96, output treesize:34 [2021-06-05 06:22:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:33,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989735633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:33,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:33,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:22:33,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342112737] [2021-06-05 06:22:33,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:22:33,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:33,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:22:33,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:22:33,736 INFO L87 Difference]: Start difference. First operand 56925 states and 238512 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 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 06:22:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:35,654 INFO L93 Difference]: Finished difference Result 108092 states and 453794 transitions. [2021-06-05 06:22:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:22:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 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 39 [2021-06-05 06:22:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:36,005 INFO L225 Difference]: With dead ends: 108092 [2021-06-05 06:22:36,005 INFO L226 Difference]: Without dead ends: 108002 [2021-06-05 06:22:36,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 874.5ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:22:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108002 states. [2021-06-05 06:22:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108002 to 56777. [2021-06-05 06:22:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56777 states, 56776 states have (on average 4.19205298013245) internal successors, (238008), 56776 states have internal predecessors, (238008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56777 states to 56777 states and 238008 transitions. [2021-06-05 06:22:38,381 INFO L78 Accepts]: Start accepts. Automaton has 56777 states and 238008 transitions. Word has length 39 [2021-06-05 06:22:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:38,381 INFO L482 AbstractCegarLoop]: Abstraction has 56777 states and 238008 transitions. [2021-06-05 06:22:38,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 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 06:22:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 56777 states and 238008 transitions. [2021-06-05 06:22:38,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:38,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:38,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:38,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:38,703 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:38,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:38,703 INFO L82 PathProgramCache]: Analyzing trace with hash -42053125, now seen corresponding path program 52 times [2021-06-05 06:22:38,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:38,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844579461] [2021-06-05 06:22:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:38,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844579461] [2021-06-05 06:22:38,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844579461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:38,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473871636] [2021-06-05 06:22:38,827 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 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 06:22:38,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:22:38,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:38,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:38,982 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:38,983 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 47 treesize of output 29 [2021-06-05 06:22:38,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:38,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:38,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:38,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:42 [2021-06-05 06:22:39,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:39,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:39,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:39,090 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 50 treesize of output 14 [2021-06-05 06:22:39,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:39,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:39,096 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 06:22:39,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:22:39,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:39,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473871636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:39,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:39,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:39,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531462728] [2021-06-05 06:22:39,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:39,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:39,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:39,111 INFO L87 Difference]: Start difference. First operand 56777 states and 238008 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:40,271 INFO L93 Difference]: Finished difference Result 93414 states and 394789 transitions. [2021-06-05 06:22:40,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:22:40,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:40,608 INFO L225 Difference]: With dead ends: 93414 [2021-06-05 06:22:40,608 INFO L226 Difference]: Without dead ends: 93359 [2021-06-05 06:22:40,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93359 states. [2021-06-05 06:22:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93359 to 60412. [2021-06-05 06:22:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60412 states, 60411 states have (on average 4.198705533760408) internal successors, (253648), 60411 states have internal predecessors, (253648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60412 states to 60412 states and 253648 transitions. [2021-06-05 06:22:42,360 INFO L78 Accepts]: Start accepts. Automaton has 60412 states and 253648 transitions. Word has length 39 [2021-06-05 06:22:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:42,360 INFO L482 AbstractCegarLoop]: Abstraction has 60412 states and 253648 transitions. [2021-06-05 06:22:42,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 60412 states and 253648 transitions. [2021-06-05 06:22:42,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:42,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:42,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:42,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:42,695 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash -679641155, now seen corresponding path program 53 times [2021-06-05 06:22:42,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:42,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189793256] [2021-06-05 06:22:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:42,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:42,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189793256] [2021-06-05 06:22:42,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189793256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:42,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400612166] [2021-06-05 06:22:42,826 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 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 06:22:42,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:22:42,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:22:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:43,022 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:43,022 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 53 treesize of output 35 [2021-06-05 06:22:43,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:43,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:43,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:43,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:42 [2021-06-05 06:22:43,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:43,072 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 44 treesize of output 14 [2021-06-05 06:22:43,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:43,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:43,078 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 06:22:43,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:7 [2021-06-05 06:22:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400612166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663804642] [2021-06-05 06:22:43,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:43,092 INFO L87 Difference]: Start difference. First operand 60412 states and 253648 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:44,431 INFO L93 Difference]: Finished difference Result 93577 states and 395481 transitions. [2021-06-05 06:22:44,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:22:44,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:44,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:44,718 INFO L225 Difference]: With dead ends: 93577 [2021-06-05 06:22:44,719 INFO L226 Difference]: Without dead ends: 93522 [2021-06-05 06:22:44,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:44,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93522 states. [2021-06-05 06:22:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93522 to 60168. [2021-06-05 06:22:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60168 states, 60167 states have (on average 4.198879784599531) internal successors, (252634), 60167 states have internal predecessors, (252634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60168 states to 60168 states and 252634 transitions. [2021-06-05 06:22:46,536 INFO L78 Accepts]: Start accepts. Automaton has 60168 states and 252634 transitions. Word has length 39 [2021-06-05 06:22:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:46,536 INFO L482 AbstractCegarLoop]: Abstraction has 60168 states and 252634 transitions. [2021-06-05 06:22:46,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:46,537 INFO L276 IsEmpty]: Start isEmpty. Operand 60168 states and 252634 transitions. [2021-06-05 06:22:46,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:46,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:46,680 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:46,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:46,882 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:46,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1223187059, now seen corresponding path program 54 times [2021-06-05 06:22:46,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:46,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838267818] [2021-06-05 06:22:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:47,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:47,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838267818] [2021-06-05 06:22:47,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838267818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:47,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802068973] [2021-06-05 06:22:47,002 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 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 06:22:47,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:22:47,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:22:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:47,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:47,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:47,646 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 62 treesize of output 40 [2021-06-05 06:22:47,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:47,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:47,656 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 06:22:47,656 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:28 [2021-06-05 06:22:47,677 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:47,678 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 14 [2021-06-05 06:22:47,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:47,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:47,681 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 06:22:47,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:22:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:47,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802068973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:47,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:47,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:47,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920584459] [2021-06-05 06:22:47,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:47,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:47,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:47,700 INFO L87 Difference]: Start difference. First operand 60168 states and 252634 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:48,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:48,501 INFO L93 Difference]: Finished difference Result 92403 states and 390707 transitions. [2021-06-05 06:22:48,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:22:48,501 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:48,796 INFO L225 Difference]: With dead ends: 92403 [2021-06-05 06:22:48,796 INFO L226 Difference]: Without dead ends: 92348 [2021-06-05 06:22:48,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92348 states. [2021-06-05 06:22:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92348 to 59146. [2021-06-05 06:22:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59146 states, 59145 states have (on average 4.195857638008285) internal successors, (248164), 59145 states have internal predecessors, (248164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59146 states to 59146 states and 248164 transitions. [2021-06-05 06:22:51,305 INFO L78 Accepts]: Start accepts. Automaton has 59146 states and 248164 transitions. Word has length 39 [2021-06-05 06:22:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:51,306 INFO L482 AbstractCegarLoop]: Abstraction has 59146 states and 248164 transitions. [2021-06-05 06:22:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 59146 states and 248164 transitions. [2021-06-05 06:22:51,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:51,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:51,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:51,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:51,693 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1432973821, now seen corresponding path program 55 times [2021-06-05 06:22:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:51,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207288733] [2021-06-05 06:22:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:51,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:51,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207288733] [2021-06-05 06:22:51,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207288733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:51,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213880250] [2021-06-05 06:22:51,883 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 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 06:22:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:51,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:52,155 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:52,156 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 57 treesize of output 39 [2021-06-05 06:22:52,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:52,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:52,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:22:52,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:22:52,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:52,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:52,222 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 50 treesize of output 14 [2021-06-05 06:22:52,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:52,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:52,229 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 06:22:52,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:22:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:52,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213880250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:52,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:52,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:52,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123095755] [2021-06-05 06:22:52,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:52,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:52,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:52,249 INFO L87 Difference]: Start difference. First operand 59146 states and 248164 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:53,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:53,095 INFO L93 Difference]: Finished difference Result 92755 states and 391851 transitions. [2021-06-05 06:22:53,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:22:53,095 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:53,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:53,847 INFO L225 Difference]: With dead ends: 92755 [2021-06-05 06:22:53,847 INFO L226 Difference]: Without dead ends: 92700 [2021-06-05 06:22:53,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 268.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:22:53,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92700 states. [2021-06-05 06:22:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92700 to 59774. [2021-06-05 06:22:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59774 states, 59773 states have (on average 4.198417345624279) internal successors, (250952), 59773 states have internal predecessors, (250952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59774 states to 59774 states and 250952 transitions. [2021-06-05 06:22:55,637 INFO L78 Accepts]: Start accepts. Automaton has 59774 states and 250952 transitions. Word has length 39 [2021-06-05 06:22:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:55,637 INFO L482 AbstractCegarLoop]: Abstraction has 59774 states and 250952 transitions. [2021-06-05 06:22:55,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:55,637 INFO L276 IsEmpty]: Start isEmpty. Operand 59774 states and 250952 transitions. [2021-06-05 06:22:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:55,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:55,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:55,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:55,960 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash -777293699, now seen corresponding path program 56 times [2021-06-05 06:22:55,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:55,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192336408] [2021-06-05 06:22:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:22:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:56,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:22:56,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192336408] [2021-06-05 06:22:56,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192336408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:56,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458786190] [2021-06-05 06:22:56,082 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 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 06:22:56,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:22:56,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:22:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:22:56,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:22:56,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:22:56,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:22:56,249 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 58 treesize of output 30 [2021-06-05 06:22:56,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:56,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,257 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 06:22:56,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:28 [2021-06-05 06:22:56,293 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:22:56,294 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 14 [2021-06-05 06:22:56,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:22:56,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:22:56,297 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 06:22:56,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:22:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:22:56,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458786190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:22:56,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:22:56,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:22:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449103092] [2021-06-05 06:22:56,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:22:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:22:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:22:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:56,315 INFO L87 Difference]: Start difference. First operand 59774 states and 250952 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:22:57,551 INFO L93 Difference]: Finished difference Result 88425 states and 373513 transitions. [2021-06-05 06:22:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:22:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:22:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:22:57,846 INFO L225 Difference]: With dead ends: 88425 [2021-06-05 06:22:57,846 INFO L226 Difference]: Without dead ends: 88370 [2021-06-05 06:22:57,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:22:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88370 states. [2021-06-05 06:22:59,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88370 to 59710. [2021-06-05 06:22:59,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59710 states, 59709 states have (on average 4.201912609489357) internal successors, (250892), 59709 states have internal predecessors, (250892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:59,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59710 states to 59710 states and 250892 transitions. [2021-06-05 06:22:59,590 INFO L78 Accepts]: Start accepts. Automaton has 59710 states and 250892 transitions. Word has length 39 [2021-06-05 06:22:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:22:59,590 INFO L482 AbstractCegarLoop]: Abstraction has 59710 states and 250892 transitions. [2021-06-05 06:22:59,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:22:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 59710 states and 250892 transitions. [2021-06-05 06:22:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:22:59,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:22:59,714 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:22:59,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:22:59,915 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:22:59,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:22:59,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1992353375, now seen corresponding path program 57 times [2021-06-05 06:22:59,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:22:59,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249536101] [2021-06-05 06:22:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:22:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:00,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:00,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249536101] [2021-06-05 06:23:00,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249536101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:00,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297684166] [2021-06-05 06:23:00,096 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 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 06:23:00,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:23:00,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:00,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:23:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:00,315 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:23:00,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 45 [2021-06-05 06:23:00,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:00,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:00,341 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 06:23:00,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:63, output treesize:53 [2021-06-05 06:23:00,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:00,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:00,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:00,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 30 [2021-06-05 06:23:00,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:00,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:00,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:00,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:16 [2021-06-05 06:23:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:00,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297684166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:00,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:00,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:23:00,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471807223] [2021-06-05 06:23:00,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:23:00,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:00,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:23:00,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:23:00,514 INFO L87 Difference]: Start difference. First operand 59710 states and 250892 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:03,481 INFO L93 Difference]: Finished difference Result 147021 states and 616524 transitions. [2021-06-05 06:23:03,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:23:03,481 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:04,010 INFO L225 Difference]: With dead ends: 147021 [2021-06-05 06:23:04,010 INFO L226 Difference]: Without dead ends: 146532 [2021-06-05 06:23:04,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1060.8ms TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:23:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146532 states. [2021-06-05 06:23:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146532 to 63283. [2021-06-05 06:23:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63283 states, 63282 states have (on average 4.1892639297114505) internal successors, (265105), 63282 states have internal predecessors, (265105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63283 states to 63283 states and 265105 transitions. [2021-06-05 06:23:06,328 INFO L78 Accepts]: Start accepts. Automaton has 63283 states and 265105 transitions. Word has length 39 [2021-06-05 06:23:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:06,328 INFO L482 AbstractCegarLoop]: Abstraction has 63283 states and 265105 transitions. [2021-06-05 06:23:06,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 63283 states and 265105 transitions. [2021-06-05 06:23:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:07,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:07,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:07,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:07,241 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:07,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:07,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1196219571, now seen corresponding path program 58 times [2021-06-05 06:23:07,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:07,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815888063] [2021-06-05 06:23:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:07,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:07,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815888063] [2021-06-05 06:23:07,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815888063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:07,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033256653] [2021-06-05 06:23:07,378 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 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 06:23:07,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:07,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:07,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:07,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:07,543 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:07,543 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 57 treesize of output 39 [2021-06-05 06:23:07,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:07,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:07,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:07,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:23:07,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:07,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:07,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:07,587 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 50 treesize of output 14 [2021-06-05 06:23:07,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:07,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:07,593 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 06:23:07,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:23:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:07,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033256653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:07,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:07,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:23:07,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041185265] [2021-06-05 06:23:07,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:23:07,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:07,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:23:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:23:07,616 INFO L87 Difference]: Start difference. First operand 63283 states and 265105 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:08,405 INFO L93 Difference]: Finished difference Result 94146 states and 395430 transitions. [2021-06-05 06:23:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:23:08,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:08,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:08,698 INFO L225 Difference]: With dead ends: 94146 [2021-06-05 06:23:08,698 INFO L226 Difference]: Without dead ends: 93986 [2021-06-05 06:23:08,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 223.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:23:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93986 states. [2021-06-05 06:23:10,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93986 to 63735. [2021-06-05 06:23:10,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63735 states, 63734 states have (on average 4.190996956098785) internal successors, (267109), 63734 states have internal predecessors, (267109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63735 states to 63735 states and 267109 transitions. [2021-06-05 06:23:10,997 INFO L78 Accepts]: Start accepts. Automaton has 63735 states and 267109 transitions. Word has length 39 [2021-06-05 06:23:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:10,997 INFO L482 AbstractCegarLoop]: Abstraction has 63735 states and 267109 transitions. [2021-06-05 06:23:10,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 63735 states and 267109 transitions. [2021-06-05 06:23:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:11,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:11,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:11,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:11,329 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:11,330 INFO L82 PathProgramCache]: Analyzing trace with hash -281696593, now seen corresponding path program 59 times [2021-06-05 06:23:11,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:11,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044959900] [2021-06-05 06:23:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:11,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:11,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044959900] [2021-06-05 06:23:11,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044959900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:11,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677026640] [2021-06-05 06:23:11,462 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 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 06:23:11,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:23:11,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:11,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:23:11,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:11,712 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:11,713 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 41 treesize of output 29 [2021-06-05 06:23:11,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:11,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:11,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:11,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:33 [2021-06-05 06:23:11,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:11,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:11,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:11,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:11,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:23:11,756 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:11,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:11,761 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 06:23:11,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 06:23:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:11,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677026640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:11,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:11,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:23:11,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891152403] [2021-06-05 06:23:11,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:23:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:23:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:23:11,783 INFO L87 Difference]: Start difference. First operand 63735 states and 267109 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:13,685 INFO L93 Difference]: Finished difference Result 101362 states and 423826 transitions. [2021-06-05 06:23:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 06:23:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:14,045 INFO L225 Difference]: With dead ends: 101362 [2021-06-05 06:23:14,045 INFO L226 Difference]: Without dead ends: 101272 [2021-06-05 06:23:14,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:23:14,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101272 states. [2021-06-05 06:23:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101272 to 66230. [2021-06-05 06:23:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66230 states, 66229 states have (on average 4.192785637711577) internal successors, (277684), 66229 states have internal predecessors, (277684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66230 states to 66230 states and 277684 transitions. [2021-06-05 06:23:16,041 INFO L78 Accepts]: Start accepts. Automaton has 66230 states and 277684 transitions. Word has length 39 [2021-06-05 06:23:16,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:16,041 INFO L482 AbstractCegarLoop]: Abstraction has 66230 states and 277684 transitions. [2021-06-05 06:23:16,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:16,041 INFO L276 IsEmpty]: Start isEmpty. Operand 66230 states and 277684 transitions. [2021-06-05 06:23:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:16,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:16,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:16,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 06:23:16,945 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:16,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:16,945 INFO L82 PathProgramCache]: Analyzing trace with hash -570345229, now seen corresponding path program 60 times [2021-06-05 06:23:16,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:16,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207645314] [2021-06-05 06:23:16,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:17,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:17,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207645314] [2021-06-05 06:23:17,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207645314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:17,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19334865] [2021-06-05 06:23:17,079 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 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 06:23:17,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:23:17,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:23:17,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:17,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:17,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:17,302 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 43 treesize of output 25 [2021-06-05 06:23:17,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:17,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:17,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:17,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2021-06-05 06:23:17,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:17,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:17,383 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 44 treesize of output 14 [2021-06-05 06:23:17,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:17,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:17,390 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 06:23:17,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:7 [2021-06-05 06:23:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:17,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19334865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:17,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:17,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:23:17,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301893108] [2021-06-05 06:23:17,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:23:17,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:17,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:23:17,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:23:17,414 INFO L87 Difference]: Start difference. First operand 66230 states and 277684 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 06:23:18,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:18,315 INFO L93 Difference]: Finished difference Result 94437 states and 395961 transitions. [2021-06-05 06:23:18,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:23:18,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 39 [2021-06-05 06:23:18,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:19,175 INFO L225 Difference]: With dead ends: 94437 [2021-06-05 06:23:19,175 INFO L226 Difference]: Without dead ends: 94347 [2021-06-05 06:23:19,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 289.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:23:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94347 states. [2021-06-05 06:23:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94347 to 66186. [2021-06-05 06:23:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66186 states, 66185 states have (on average 4.194787338520813) internal successors, (277632), 66185 states have internal predecessors, (277632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66186 states to 66186 states and 277632 transitions. [2021-06-05 06:23:21,035 INFO L78 Accepts]: Start accepts. Automaton has 66186 states and 277632 transitions. Word has length 39 [2021-06-05 06:23:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:21,035 INFO L482 AbstractCegarLoop]: Abstraction has 66186 states and 277632 transitions. [2021-06-05 06:23:21,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 06:23:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 66186 states and 277632 transitions. [2021-06-05 06:23:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:21,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:21,182 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:21,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:21,383 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:21,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:21,383 INFO L82 PathProgramCache]: Analyzing trace with hash -14258787, now seen corresponding path program 61 times [2021-06-05 06:23:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:21,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72737376] [2021-06-05 06:23:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:21,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:21,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72737376] [2021-06-05 06:23:21,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72737376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089082733] [2021-06-05 06:23:21,545 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 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 06:23:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:21,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:21,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:21,703 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 37 treesize of output 17 [2021-06-05 06:23:21,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,719 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 06:23:21,719 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:28 [2021-06-05 06:23:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:21,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:21,847 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 50 treesize of output 14 [2021-06-05 06:23:21,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:21,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:21,856 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 06:23:21,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:23:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:21,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089082733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:21,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:21,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:23:21,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507058035] [2021-06-05 06:23:21,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:23:21,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:21,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:23:21,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:23:21,875 INFO L87 Difference]: Start difference. First operand 66186 states and 277632 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:23,203 INFO L93 Difference]: Finished difference Result 101390 states and 423254 transitions. [2021-06-05 06:23:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:23:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:23,543 INFO L225 Difference]: With dead ends: 101390 [2021-06-05 06:23:23,543 INFO L226 Difference]: Without dead ends: 101060 [2021-06-05 06:23:23,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:23:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101060 states. [2021-06-05 06:23:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101060 to 68895. [2021-06-05 06:23:25,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68895 states, 68894 states have (on average 4.195619357273492) internal successors, (289053), 68894 states have internal predecessors, (289053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68895 states to 68895 states and 289053 transitions. [2021-06-05 06:23:25,652 INFO L78 Accepts]: Start accepts. Automaton has 68895 states and 289053 transitions. Word has length 39 [2021-06-05 06:23:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:25,652 INFO L482 AbstractCegarLoop]: Abstraction has 68895 states and 289053 transitions. [2021-06-05 06:23:25,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 68895 states and 289053 transitions. [2021-06-05 06:23:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:26,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:26,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:26,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:26,584 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1920260687, now seen corresponding path program 62 times [2021-06-05 06:23:26,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:26,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958173068] [2021-06-05 06:23:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:26,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:26,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958173068] [2021-06-05 06:23:26,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958173068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:26,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108017274] [2021-06-05 06:23:26,760 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 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 06:23:26,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:23:26,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:26,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:26,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:26,906 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 37 treesize of output 17 [2021-06-05 06:23:26,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:26,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:26,921 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 06:23:26,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:28 [2021-06-05 06:23:27,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:27,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:27,003 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 50 treesize of output 14 [2021-06-05 06:23:27,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:27,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:27,010 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 06:23:27,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:23:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:27,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108017274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:27,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:27,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:23:27,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528693121] [2021-06-05 06:23:27,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:23:27,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:23:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:23:27,031 INFO L87 Difference]: Start difference. First operand 68895 states and 289053 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:27,803 INFO L93 Difference]: Finished difference Result 98822 states and 408326 transitions. [2021-06-05 06:23:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:23:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:28,115 INFO L225 Difference]: With dead ends: 98822 [2021-06-05 06:23:28,115 INFO L226 Difference]: Without dead ends: 98387 [2021-06-05 06:23:28,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:23:28,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98387 states. [2021-06-05 06:23:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98387 to 69083. [2021-06-05 06:23:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69083 states, 69082 states have (on average 4.198141339277959) internal successors, (290016), 69082 states have internal predecessors, (290016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69083 states to 69083 states and 290016 transitions. [2021-06-05 06:23:30,520 INFO L78 Accepts]: Start accepts. Automaton has 69083 states and 290016 transitions. Word has length 39 [2021-06-05 06:23:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:30,520 INFO L482 AbstractCegarLoop]: Abstraction has 69083 states and 290016 transitions. [2021-06-05 06:23:30,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 69083 states and 290016 transitions. [2021-06-05 06:23:30,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:30,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:30,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:30,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-05 06:23:30,862 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash 927758839, now seen corresponding path program 63 times [2021-06-05 06:23:30,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:30,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378750962] [2021-06-05 06:23:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:31,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:31,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378750962] [2021-06-05 06:23:31,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378750962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:31,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106060521] [2021-06-05 06:23:31,008 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 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 06:23:31,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:23:31,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:23:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:31,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,235 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 48 [2021-06-05 06:23:31,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:31,264 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,270 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 06:23:31,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:58 [2021-06-05 06:23:31,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:31,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,407 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:23:31,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:31,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:31,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:31,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:23:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:31,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106060521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:31,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:31,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:23:31,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442187468] [2021-06-05 06:23:31,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:23:31,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:31,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:23:31,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:23:31,479 INFO L87 Difference]: Start difference. First operand 69083 states and 290016 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:33,141 INFO L93 Difference]: Finished difference Result 117130 states and 491571 transitions. [2021-06-05 06:23:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:23:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:33,534 INFO L225 Difference]: With dead ends: 117130 [2021-06-05 06:23:33,534 INFO L226 Difference]: Without dead ends: 117043 [2021-06-05 06:23:33,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 582.7ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:23:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117043 states. [2021-06-05 06:23:35,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117043 to 69453. [2021-06-05 06:23:35,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69453 states, 69452 states have (on average 4.199072740885792) internal successors, (291634), 69452 states have internal predecessors, (291634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69453 states to 69453 states and 291634 transitions. [2021-06-05 06:23:36,160 INFO L78 Accepts]: Start accepts. Automaton has 69453 states and 291634 transitions. Word has length 39 [2021-06-05 06:23:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:36,160 INFO L482 AbstractCegarLoop]: Abstraction has 69453 states and 291634 transitions. [2021-06-05 06:23:36,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 69453 states and 291634 transitions. [2021-06-05 06:23:36,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:36,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:36,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:36,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:36,514 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 290170809, now seen corresponding path program 64 times [2021-06-05 06:23:36,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:36,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597193808] [2021-06-05 06:23:36,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:36,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:36,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597193808] [2021-06-05 06:23:36,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597193808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:36,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094029857] [2021-06-05 06:23:36,702 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 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 06:23:36,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:23:36,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:36,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:37,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,022 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 70 treesize of output 42 [2021-06-05 06:23:37,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:37,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:40 [2021-06-05 06:23:37,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:37,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:37,078 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 34 treesize of output 14 [2021-06-05 06:23:37,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:37,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:37,084 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 06:23:37,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:7 [2021-06-05 06:23:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:37,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094029857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:37,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:37,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:23:37,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159455971] [2021-06-05 06:23:37,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:23:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:37,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:23:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:23:37,099 INFO L87 Difference]: Start difference. First operand 69453 states and 291634 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 06:23:38,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:38,378 INFO L93 Difference]: Finished difference Result 110882 states and 465508 transitions. [2021-06-05 06:23:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:23:38,378 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 39 [2021-06-05 06:23:38,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:38,778 INFO L225 Difference]: With dead ends: 110882 [2021-06-05 06:23:38,778 INFO L226 Difference]: Without dead ends: 110795 [2021-06-05 06:23:38,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:23:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110795 states. [2021-06-05 06:23:40,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110795 to 70221. [2021-06-05 06:23:40,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70221 states, 70220 states have (on average 4.202648818000569) internal successors, (295110), 70220 states have internal predecessors, (295110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70221 states to 70221 states and 295110 transitions. [2021-06-05 06:23:41,345 INFO L78 Accepts]: Start accepts. Automaton has 70221 states and 295110 transitions. Word has length 39 [2021-06-05 06:23:41,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:41,346 INFO L482 AbstractCegarLoop]: Abstraction has 70221 states and 295110 transitions. [2021-06-05 06:23:41,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 06:23:41,346 INFO L276 IsEmpty]: Start isEmpty. Operand 70221 states and 295110 transitions. [2021-06-05 06:23:41,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:41,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:41,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:41,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:41,753 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1108789151, now seen corresponding path program 65 times [2021-06-05 06:23:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:41,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909465926] [2021-06-05 06:23:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:41,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:41,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909465926] [2021-06-05 06:23:41,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909465926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:41,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438945641] [2021-06-05 06:23:41,915 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 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 06:23:41,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:23:41,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:41,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 06:23:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:42,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:42,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:42,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 47 [2021-06-05 06:23:42,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:42,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:42,170 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 06:23:42,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:34 [2021-06-05 06:23:42,236 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:23:42,236 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 21 treesize of output 9 [2021-06-05 06:23:42,238 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:42,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:42,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:42,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2021-06-05 06:23:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:42,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438945641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:42,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:42,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:23:42,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825456188] [2021-06-05 06:23:42,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:23:42,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:23:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:23:42,260 INFO L87 Difference]: Start difference. First operand 70221 states and 295110 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:44,311 INFO L93 Difference]: Finished difference Result 130935 states and 538919 transitions. [2021-06-05 06:23:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:23:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:44,760 INFO L225 Difference]: With dead ends: 130935 [2021-06-05 06:23:44,760 INFO L226 Difference]: Without dead ends: 130315 [2021-06-05 06:23:44,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=154, Invalid=968, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:23:44,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130315 states. [2021-06-05 06:23:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130315 to 78765. [2021-06-05 06:23:47,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78765 states, 78764 states have (on average 4.2050302168503375) internal successors, (331205), 78764 states have internal predecessors, (331205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78765 states to 78765 states and 331205 transitions. [2021-06-05 06:23:47,690 INFO L78 Accepts]: Start accepts. Automaton has 78765 states and 331205 transitions. Word has length 39 [2021-06-05 06:23:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:47,690 INFO L482 AbstractCegarLoop]: Abstraction has 78765 states and 331205 transitions. [2021-06-05 06:23:47,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 78765 states and 331205 transitions. [2021-06-05 06:23:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:47,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:47,856 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:48,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-06-05 06:23:48,069 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1112217647, now seen corresponding path program 66 times [2021-06-05 06:23:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:48,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652038420] [2021-06-05 06:23:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:48,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:48,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652038420] [2021-06-05 06:23:48,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652038420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:48,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898205220] [2021-06-05 06:23:48,217 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 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 06:23:48,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:23:48,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:23:48,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:48,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:48,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:48,493 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:48,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-05 06:23:48,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:48,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:48,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:48,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:79, output treesize:45 [2021-06-05 06:23:48,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:48,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 06:23:48,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:48,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:48,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:48,604 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 06:23:48,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:23:48,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:48,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:23:48,635 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:32 [2021-06-05 06:23:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:48,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898205220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:48,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:48,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:23:48,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233300370] [2021-06-05 06:23:48,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:23:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:23:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:23:48,708 INFO L87 Difference]: Start difference. First operand 78765 states and 331205 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:49,671 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-06-05 06:23:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:51,779 INFO L93 Difference]: Finished difference Result 172567 states and 722103 transitions. [2021-06-05 06:23:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:23:51,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:23:51,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:52,452 INFO L225 Difference]: With dead ends: 172567 [2021-06-05 06:23:52,452 INFO L226 Difference]: Without dead ends: 172203 [2021-06-05 06:23:52,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1400.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:23:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172203 states. [2021-06-05 06:23:54,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172203 to 80063. [2021-06-05 06:23:55,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80063 states, 80062 states have (on average 4.204841248032775) internal successors, (336648), 80062 states have internal predecessors, (336648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80063 states to 80063 states and 336648 transitions. [2021-06-05 06:23:55,756 INFO L78 Accepts]: Start accepts. Automaton has 80063 states and 336648 transitions. Word has length 39 [2021-06-05 06:23:55,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:23:55,756 INFO L482 AbstractCegarLoop]: Abstraction has 80063 states and 336648 transitions. [2021-06-05 06:23:55,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:23:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 80063 states and 336648 transitions. [2021-06-05 06:23:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:23:55,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:23:55,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:23:56,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 06:23:56,131 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:23:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:23:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2061876957, now seen corresponding path program 67 times [2021-06-05 06:23:56,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:23:56,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157234108] [2021-06-05 06:23:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:23:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:56,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:23:56,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157234108] [2021-06-05 06:23:56,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157234108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:56,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832924008] [2021-06-05 06:23:56,279 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:23:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:23:56,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:23:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:23:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:56,440 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 58 treesize of output 30 [2021-06-05 06:23:56,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:56,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:56,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:23:56,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:38 [2021-06-05 06:23:56,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:56,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:23:56,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:23:56,579 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 34 treesize of output 14 [2021-06-05 06:23:56,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:23:56,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:23:56,587 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 06:23:56,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:7 [2021-06-05 06:23:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:23:56,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832924008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:23:56,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:23:56,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:23:56,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253019631] [2021-06-05 06:23:56,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:23:56,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:23:56,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:23:56,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:23:56,607 INFO L87 Difference]: Start difference. First operand 80063 states and 336648 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 06:23:58,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:23:58,326 INFO L93 Difference]: Finished difference Result 115950 states and 486620 transitions. [2021-06-05 06:23:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:23:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 39 [2021-06-05 06:23:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:23:59,021 INFO L225 Difference]: With dead ends: 115950 [2021-06-05 06:23:59,021 INFO L226 Difference]: Without dead ends: 115863 [2021-06-05 06:23:59,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:23:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115863 states. [2021-06-05 06:24:01,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115863 to 81072. [2021-06-05 06:24:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81072 states, 81071 states have (on average 4.203932355589545) internal successors, (340817), 81071 states have internal predecessors, (340817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81072 states to 81072 states and 340817 transitions. [2021-06-05 06:24:01,868 INFO L78 Accepts]: Start accepts. Automaton has 81072 states and 340817 transitions. Word has length 39 [2021-06-05 06:24:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:01,869 INFO L482 AbstractCegarLoop]: Abstraction has 81072 states and 340817 transitions. [2021-06-05 06:24:01,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 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 06:24:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 81072 states and 340817 transitions. [2021-06-05 06:24:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:02,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:02,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:02,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 06:24:02,353 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash -826464783, now seen corresponding path program 68 times [2021-06-05 06:24:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:02,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70338522] [2021-06-05 06:24:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:02,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:02,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70338522] [2021-06-05 06:24:02,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70338522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:02,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813793972] [2021-06-05 06:24:02,519 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 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 06:24:02,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:02,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:24:02,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:02,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:02,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:02,760 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 64 treesize of output 36 [2021-06-05 06:24:02,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:02,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:02,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:02,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:84, output treesize:46 [2021-06-05 06:24:02,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:02,828 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:02,828 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:24:02,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:02,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:02,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:02,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:24:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:02,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813793972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:02,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:02,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:24:02,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934960952] [2021-06-05 06:24:02,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:24:02,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:02,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:24:02,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:24:02,886 INFO L87 Difference]: Start difference. First operand 81072 states and 340817 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:04,761 INFO L93 Difference]: Finished difference Result 127969 states and 536447 transitions. [2021-06-05 06:24:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:24:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:04,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:05,201 INFO L225 Difference]: With dead ends: 127969 [2021-06-05 06:24:05,202 INFO L226 Difference]: Without dead ends: 127882 [2021-06-05 06:24:05,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:24:05,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127882 states. [2021-06-05 06:24:07,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127882 to 80556. [2021-06-05 06:24:07,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80556 states, 80555 states have (on average 4.202656570045311) internal successors, (338545), 80555 states have internal predecessors, (338545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80556 states to 80556 states and 338545 transitions. [2021-06-05 06:24:08,143 INFO L78 Accepts]: Start accepts. Automaton has 80556 states and 338545 transitions. Word has length 39 [2021-06-05 06:24:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:08,143 INFO L482 AbstractCegarLoop]: Abstraction has 80556 states and 338545 transitions. [2021-06-05 06:24:08,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:08,143 INFO L276 IsEmpty]: Start isEmpty. Operand 80556 states and 338545 transitions. [2021-06-05 06:24:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:08,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:08,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:08,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 06:24:08,517 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:08,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:08,518 INFO L82 PathProgramCache]: Analyzing trace with hash 592528241, now seen corresponding path program 69 times [2021-06-05 06:24:08,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:08,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419612905] [2021-06-05 06:24:08,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:08,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419612905] [2021-06-05 06:24:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419612905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299438477] [2021-06-05 06:24:08,660 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 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 06:24:08,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:24:08,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:08,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:24:08,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:08,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:08,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2021-06-05 06:24:08,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:08,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:08,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:08,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:56 [2021-06-05 06:24:08,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:09,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 06:24:09,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:09,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:09,013 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:24:09,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:09,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:09,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:09,042 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:36 [2021-06-05 06:24:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:09,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299438477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:09,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:09,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:24:09,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873349745] [2021-06-05 06:24:09,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:24:09,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:24:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:24:09,114 INFO L87 Difference]: Start difference. First operand 80556 states and 338545 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:10,646 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-06-05 06:24:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:12,486 INFO L93 Difference]: Finished difference Result 184366 states and 778402 transitions. [2021-06-05 06:24:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:24:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:13,213 INFO L225 Difference]: With dead ends: 184366 [2021-06-05 06:24:13,213 INFO L226 Difference]: Without dead ends: 184215 [2021-06-05 06:24:13,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1578.8ms TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:24:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184215 states. [2021-06-05 06:24:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184215 to 82721. [2021-06-05 06:24:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82721 states, 82720 states have (on average 4.206757736943907) internal successors, (347983), 82720 states have internal predecessors, (347983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82721 states to 82721 states and 347983 transitions. [2021-06-05 06:24:16,536 INFO L78 Accepts]: Start accepts. Automaton has 82721 states and 347983 transitions. Word has length 39 [2021-06-05 06:24:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:16,536 INFO L482 AbstractCegarLoop]: Abstraction has 82721 states and 347983 transitions. [2021-06-05 06:24:16,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:16,536 INFO L276 IsEmpty]: Start isEmpty. Operand 82721 states and 347983 transitions. [2021-06-05 06:24:16,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:16,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:16,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 06:24:16,929 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:16,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:16,929 INFO L82 PathProgramCache]: Analyzing trace with hash -15830457, now seen corresponding path program 70 times [2021-06-05 06:24:16,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:16,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407849546] [2021-06-05 06:24:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:17,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407849546] [2021-06-05 06:24:17,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407849546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:17,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941991237] [2021-06-05 06:24:17,149 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 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 06:24:17,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:17,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:17,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:17,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:17,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:17,367 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 51 treesize of output 31 [2021-06-05 06:24:17,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,382 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 06:24:17,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:36 [2021-06-05 06:24:17,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:17,446 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 50 treesize of output 14 [2021-06-05 06:24:17,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:17,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:17,452 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 06:24:17,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:24:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:17,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941991237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:17,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:17,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:24:17,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038707655] [2021-06-05 06:24:17,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:24:17,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:17,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:24:17,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:24:17,475 INFO L87 Difference]: Start difference. First operand 82721 states and 347983 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:19,067 INFO L93 Difference]: Finished difference Result 141337 states and 590419 transitions. [2021-06-05 06:24:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:24:19,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:19,533 INFO L225 Difference]: With dead ends: 141337 [2021-06-05 06:24:19,534 INFO L226 Difference]: Without dead ends: 140790 [2021-06-05 06:24:19,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 406.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:24:19,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140790 states. [2021-06-05 06:24:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140790 to 83045. [2021-06-05 06:24:22,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83045 states, 83044 states have (on average 4.206191898270796) internal successors, (349299), 83044 states have internal predecessors, (349299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83045 states to 83045 states and 349299 transitions. [2021-06-05 06:24:22,578 INFO L78 Accepts]: Start accepts. Automaton has 83045 states and 349299 transitions. Word has length 39 [2021-06-05 06:24:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:22,578 INFO L482 AbstractCegarLoop]: Abstraction has 83045 states and 349299 transitions. [2021-06-05 06:24:22,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 83045 states and 349299 transitions. [2021-06-05 06:24:22,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:22,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:22,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:22,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:22,958 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash -54274277, now seen corresponding path program 71 times [2021-06-05 06:24:22,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:22,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463736104] [2021-06-05 06:24:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:23,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:23,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463736104] [2021-06-05 06:24:23,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463736104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:23,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293234768] [2021-06-05 06:24:23,123 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 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 06:24:23,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:24:23,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:24:23,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:23,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:23,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:23,316 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 53 treesize of output 35 [2021-06-05 06:24:23,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:23,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:23,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:23,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:78, output treesize:39 [2021-06-05 06:24:23,814 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:24:23,814 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 44 treesize of output 40 [2021-06-05 06:24:23,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:23,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:23,842 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 06:24:23,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:26 [2021-06-05 06:24:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:23,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293234768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:23,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:23,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:24:23,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128703142] [2021-06-05 06:24:23,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:24:23,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:24:23,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:24:23,942 INFO L87 Difference]: Start difference. First operand 83045 states and 349299 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:24:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:26,644 INFO L93 Difference]: Finished difference Result 183018 states and 763108 transitions. [2021-06-05 06:24:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:24:26,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 39 [2021-06-05 06:24:26,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:27,299 INFO L225 Difference]: With dead ends: 183018 [2021-06-05 06:24:27,299 INFO L226 Difference]: Without dead ends: 182518 [2021-06-05 06:24:27,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1423.9ms TimeCoverageRelationStatistics Valid=223, Invalid=1037, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 06:24:27,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182518 states. [2021-06-05 06:24:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182518 to 87651. [2021-06-05 06:24:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87651 states, 87650 states have (on average 4.207803764974329) internal successors, (368814), 87650 states have internal predecessors, (368814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:30,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87651 states to 87651 states and 368814 transitions. [2021-06-05 06:24:30,674 INFO L78 Accepts]: Start accepts. Automaton has 87651 states and 368814 transitions. Word has length 39 [2021-06-05 06:24:30,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:30,674 INFO L482 AbstractCegarLoop]: Abstraction has 87651 states and 368814 transitions. [2021-06-05 06:24:30,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:24:30,675 INFO L276 IsEmpty]: Start isEmpty. Operand 87651 states and 368814 transitions. [2021-06-05 06:24:30,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:30,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:30,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:31,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 06:24:31,077 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash 565573799, now seen corresponding path program 72 times [2021-06-05 06:24:31,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:31,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068149826] [2021-06-05 06:24:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:31,213 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:31,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068149826] [2021-06-05 06:24:31,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068149826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:31,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860470050] [2021-06-05 06:24:31,213 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 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 06:24:31,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:24:31,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:31,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:31,956 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:24:31,957 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 52 treesize of output 48 [2021-06-05 06:24:31,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:31,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:31,980 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 06:24:31,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:53 [2021-06-05 06:24:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:32,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:32,081 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 06:24:32,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:32,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:32,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:32,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:27 [2021-06-05 06:24:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:32,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860470050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:32,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:32,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:24:32,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570677914] [2021-06-05 06:24:32,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:24:32,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:24:32,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:24:32,130 INFO L87 Difference]: Start difference. First operand 87651 states and 368814 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:24:34,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:34,568 INFO L93 Difference]: Finished difference Result 162263 states and 682387 transitions. [2021-06-05 06:24:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:24:34,568 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 06:24:34,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:35,152 INFO L225 Difference]: With dead ends: 162263 [2021-06-05 06:24:35,153 INFO L226 Difference]: Without dead ends: 162176 [2021-06-05 06:24:35,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 956.7ms TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:24:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162176 states. [2021-06-05 06:24:37,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162176 to 89799. [2021-06-05 06:24:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89799 states, 89798 states have (on average 4.207643822802289) internal successors, (377838), 89798 states have internal predecessors, (377838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89799 states to 89799 states and 377838 transitions. [2021-06-05 06:24:38,352 INFO L78 Accepts]: Start accepts. Automaton has 89799 states and 377838 transitions. Word has length 39 [2021-06-05 06:24:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:38,352 INFO L482 AbstractCegarLoop]: Abstraction has 89799 states and 377838 transitions. [2021-06-05 06:24:38,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:24:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 89799 states and 377838 transitions. [2021-06-05 06:24:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:38,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:38,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:38,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:24:38,762 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:38,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:38,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1074988299, now seen corresponding path program 73 times [2021-06-05 06:24:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:38,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724996637] [2021-06-05 06:24:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:38,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:38,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724996637] [2021-06-05 06:24:38,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724996637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:38,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648618202] [2021-06-05 06:24:38,909 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 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 06:24:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:38,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:39,127 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:39,127 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 57 treesize of output 39 [2021-06-05 06:24:39,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:24:39,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:24:39,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:39,175 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 50 treesize of output 14 [2021-06-05 06:24:39,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:39,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:39,183 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 06:24:39,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:24:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648618202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:39,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:39,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:24:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319244275] [2021-06-05 06:24:39,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:24:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:24:39,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:24:39,207 INFO L87 Difference]: Start difference. First operand 89799 states and 377838 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:39,830 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-06-05 06:24:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:40,590 INFO L93 Difference]: Finished difference Result 118556 states and 499351 transitions. [2021-06-05 06:24:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:24:40,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:40,981 INFO L225 Difference]: With dead ends: 118556 [2021-06-05 06:24:40,981 INFO L226 Difference]: Without dead ends: 118405 [2021-06-05 06:24:40,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:24:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118405 states. [2021-06-05 06:24:43,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118405 to 89049. [2021-06-05 06:24:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89049 states, 89048 states have (on average 4.206809810439314) internal successors, (374608), 89048 states have internal predecessors, (374608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89049 states to 89049 states and 374608 transitions. [2021-06-05 06:24:43,895 INFO L78 Accepts]: Start accepts. Automaton has 89049 states and 374608 transitions. Word has length 39 [2021-06-05 06:24:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:43,896 INFO L482 AbstractCegarLoop]: Abstraction has 89049 states and 374608 transitions. [2021-06-05 06:24:43,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 89049 states and 374608 transitions. [2021-06-05 06:24:44,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:44,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:44,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:44,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 06:24:44,332 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1683346997, now seen corresponding path program 74 times [2021-06-05 06:24:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:44,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802900868] [2021-06-05 06:24:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:44,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:44,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802900868] [2021-06-05 06:24:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802900868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438298707] [2021-06-05 06:24:44,492 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 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 06:24:44,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:24:44,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:44,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:44,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:44,624 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:44,624 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 49 treesize of output 31 [2021-06-05 06:24:44,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:44,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:44,631 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 06:24:44,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 06:24:44,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:44,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:44,681 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 50 treesize of output 14 [2021-06-05 06:24:44,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:44,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:44,687 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 06:24:44,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:24:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:44,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438298707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:44,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:44,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:24:44,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116665573] [2021-06-05 06:24:44,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:24:44,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:24:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:24:44,709 INFO L87 Difference]: Start difference. First operand 89049 states and 374608 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:46,360 INFO L93 Difference]: Finished difference Result 130159 states and 547824 transitions. [2021-06-05 06:24:46,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:24:46,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:24:46,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:46,792 INFO L225 Difference]: With dead ends: 130159 [2021-06-05 06:24:46,792 INFO L226 Difference]: Without dead ends: 129920 [2021-06-05 06:24:46,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:24:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129920 states. [2021-06-05 06:24:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129920 to 89337. [2021-06-05 06:24:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89337 states, 89336 states have (on average 4.205426703680487) internal successors, (375696), 89336 states have internal predecessors, (375696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89337 states to 89337 states and 375696 transitions. [2021-06-05 06:24:49,765 INFO L78 Accepts]: Start accepts. Automaton has 89337 states and 375696 transitions. Word has length 39 [2021-06-05 06:24:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:49,765 INFO L482 AbstractCegarLoop]: Abstraction has 89337 states and 375696 transitions. [2021-06-05 06:24:49,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:49,765 INFO L276 IsEmpty]: Start isEmpty. Operand 89337 states and 375696 transitions. [2021-06-05 06:24:49,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:49,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:49,965 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:50,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 06:24:50,169 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:50,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1721790817, now seen corresponding path program 75 times [2021-06-05 06:24:50,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:50,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967720434] [2021-06-05 06:24:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:50,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967720434] [2021-06-05 06:24:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967720434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:50,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108917261] [2021-06-05 06:24:50,349 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 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 06:24:50,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:24:50,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:50,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:24:50,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:50,971 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-06-05 06:24:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:51,179 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2021-06-05 06:24:51,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:51,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:51,206 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 06:24:51,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:82, output treesize:42 [2021-06-05 06:24:51,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:24:51,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:51,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:51,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-06-05 06:24:51,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:24:51,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:51,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:24:51,285 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:73, output treesize:40 [2021-06-05 06:24:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:51,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108917261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:51,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:51,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:24:51,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714444309] [2021-06-05 06:24:51,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:24:51,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:24:51,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:24:51,357 INFO L87 Difference]: Start difference. First operand 89337 states and 375696 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:24:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:24:53,802 INFO L93 Difference]: Finished difference Result 181486 states and 762774 transitions. [2021-06-05 06:24:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:24:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 39 [2021-06-05 06:24:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:24:54,437 INFO L225 Difference]: With dead ends: 181486 [2021-06-05 06:24:54,437 INFO L226 Difference]: Without dead ends: 181312 [2021-06-05 06:24:54,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1315.5ms TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:24:54,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181312 states. [2021-06-05 06:24:57,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181312 to 92506. [2021-06-05 06:24:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92506 states, 92505 states have (on average 4.214788389816767) internal successors, (389889), 92505 states have internal predecessors, (389889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:24:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92506 states to 92506 states and 389889 transitions. [2021-06-05 06:24:57,819 INFO L78 Accepts]: Start accepts. Automaton has 92506 states and 389889 transitions. Word has length 39 [2021-06-05 06:24:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:24:57,819 INFO L482 AbstractCegarLoop]: Abstraction has 92506 states and 389889 transitions. [2021-06-05 06:24:57,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:24:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 92506 states and 389889 transitions. [2021-06-05 06:24:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:24:58,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:24:58,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:24:58,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 06:24:58,237 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:24:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:24:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1096998499, now seen corresponding path program 76 times [2021-06-05 06:24:58,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:24:58,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79111850] [2021-06-05 06:24:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:24:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:24:58,851 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 06:24:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:58,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:24:58,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79111850] [2021-06-05 06:24:58,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79111850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:58,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760442183] [2021-06-05 06:24:58,936 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 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 06:24:59,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:24:59,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:24:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:24:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:24:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:24:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:24:59,166 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 58 treesize of output 30 [2021-06-05 06:24:59,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:59,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:59,179 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 06:24:59,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:28 [2021-06-05 06:24:59,251 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:24:59,251 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 14 [2021-06-05 06:24:59,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:24:59,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:24:59,256 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 06:24:59,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:24:59,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:24:59,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760442183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:24:59,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:24:59,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:24:59,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592981393] [2021-06-05 06:24:59,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:24:59,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:24:59,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:24:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:24:59,276 INFO L87 Difference]: Start difference. First operand 92506 states and 389889 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 06:25:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:00,194 INFO L93 Difference]: Finished difference Result 124553 states and 527785 transitions. [2021-06-05 06:25:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:25:00,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 39 [2021-06-05 06:25:00,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:01,209 INFO L225 Difference]: With dead ends: 124553 [2021-06-05 06:25:01,209 INFO L226 Difference]: Without dead ends: 124498 [2021-06-05 06:25:01,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 780.7ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:25:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124498 states. [2021-06-05 06:25:03,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124498 to 93599. [2021-06-05 06:25:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93599 states, 93598 states have (on average 4.2167567683070155) internal successors, (394680), 93598 states have internal predecessors, (394680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93599 states to 93599 states and 394680 transitions. [2021-06-05 06:25:03,742 INFO L78 Accepts]: Start accepts. Automaton has 93599 states and 394680 transitions. Word has length 39 [2021-06-05 06:25:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:03,742 INFO L482 AbstractCegarLoop]: Abstraction has 93599 states and 394680 transitions. [2021-06-05 06:25:03,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 06:25:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 93599 states and 394680 transitions. [2021-06-05 06:25:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:04,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:04,550 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:04,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:04,773 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:04,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1962556623, now seen corresponding path program 77 times [2021-06-05 06:25:04,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:04,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108782820] [2021-06-05 06:25:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:04,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:04,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108782820] [2021-06-05 06:25:04,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108782820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:04,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426824633] [2021-06-05 06:25:04,888 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 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 06:25:04,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:25:04,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:25:04,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:05,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:05,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:05,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:05,182 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 62 [2021-06-05 06:25:05,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:05,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:05,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:05,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:43 [2021-06-05 06:25:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:05,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:05,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:05,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:25:05,320 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:05,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:05,324 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 06:25:05,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 06:25:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:05,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426824633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:05,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:05,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:25:05,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3074810] [2021-06-05 06:25:05,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:25:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:05,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:25:05,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:25:05,339 INFO L87 Difference]: Start difference. First operand 93599 states and 394680 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:09,525 INFO L93 Difference]: Finished difference Result 149789 states and 630787 transitions. [2021-06-05 06:25:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:25:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:10,227 INFO L225 Difference]: With dead ends: 149789 [2021-06-05 06:25:10,227 INFO L226 Difference]: Without dead ends: 149250 [2021-06-05 06:25:10,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1101.2ms TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:25:10,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149250 states. [2021-06-05 06:25:13,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149250 to 108735. [2021-06-05 06:25:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108735 states, 108734 states have (on average 4.2187908106020195) internal successors, (458726), 108734 states have internal predecessors, (458726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108735 states to 108735 states and 458726 transitions. [2021-06-05 06:25:14,464 INFO L78 Accepts]: Start accepts. Automaton has 108735 states and 458726 transitions. Word has length 39 [2021-06-05 06:25:14,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:14,465 INFO L482 AbstractCegarLoop]: Abstraction has 108735 states and 458726 transitions. [2021-06-05 06:25:14,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 108735 states and 458726 transitions. [2021-06-05 06:25:14,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:14,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:14,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:15,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 06:25:15,016 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash -59728409, now seen corresponding path program 78 times [2021-06-05 06:25:15,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:15,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354276307] [2021-06-05 06:25:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:15,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354276307] [2021-06-05 06:25:15,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354276307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:15,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756360092] [2021-06-05 06:25:15,169 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 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 06:25:15,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:25:15,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:25:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:15,455 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:15,456 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 53 treesize of output 35 [2021-06-05 06:25:15,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:15,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:15,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:36 [2021-06-05 06:25:15,516 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:25:15,516 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 44 treesize of output 40 [2021-06-05 06:25:15,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:15,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:15,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:15,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 06:25:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:15,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756360092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:15,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:15,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:25:15,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209267429] [2021-06-05 06:25:15,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:25:15,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:15,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:25:15,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:25:15,589 INFO L87 Difference]: Start difference. First operand 108735 states and 458726 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:17,885 INFO L93 Difference]: Finished difference Result 167353 states and 710562 transitions. [2021-06-05 06:25:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:25:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:18,503 INFO L225 Difference]: With dead ends: 167353 [2021-06-05 06:25:18,503 INFO L226 Difference]: Without dead ends: 167298 [2021-06-05 06:25:18,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 621.8ms TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:25:18,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167298 states. [2021-06-05 06:25:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167298 to 107032. [2021-06-05 06:25:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107032 states, 107031 states have (on average 4.211835823266156) internal successors, (450797), 107031 states have internal predecessors, (450797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:22,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107032 states to 107032 states and 450797 transitions. [2021-06-05 06:25:22,834 INFO L78 Accepts]: Start accepts. Automaton has 107032 states and 450797 transitions. Word has length 39 [2021-06-05 06:25:22,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:22,835 INFO L482 AbstractCegarLoop]: Abstraction has 107032 states and 450797 transitions. [2021-06-05 06:25:22,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:22,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107032 states and 450797 transitions. [2021-06-05 06:25:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:23,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:23,202 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:23,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:23,403 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash -425686603, now seen corresponding path program 79 times [2021-06-05 06:25:23,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:23,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742554875] [2021-06-05 06:25:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:23,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:23,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742554875] [2021-06-05 06:25:23,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742554875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:23,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604554047] [2021-06-05 06:25:23,536 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 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 06:25:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:23,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:25:23,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:23,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:23,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:23,791 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 68 treesize of output 40 [2021-06-05 06:25:23,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:23,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:23,802 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 06:25:23,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:36 [2021-06-05 06:25:23,838 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:23,838 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 32 treesize of output 14 [2021-06-05 06:25:23,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:23,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:23,843 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 06:25:23,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:25:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:23,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604554047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:23,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:23,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:25:23,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006181105] [2021-06-05 06:25:23,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:25:23,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:25:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:25:23,861 INFO L87 Difference]: Start difference. First operand 107032 states and 450797 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 06:25:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:25,637 INFO L93 Difference]: Finished difference Result 140247 states and 593014 transitions. [2021-06-05 06:25:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:25:25,637 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 39 [2021-06-05 06:25:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:26,160 INFO L225 Difference]: With dead ends: 140247 [2021-06-05 06:25:26,160 INFO L226 Difference]: Without dead ends: 140192 [2021-06-05 06:25:26,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 244.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:25:26,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140192 states. [2021-06-05 06:25:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140192 to 107696. [2021-06-05 06:25:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.213166813686801) internal successors, (453737), 107695 states have internal predecessors, (453737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:29,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 453737 transitions. [2021-06-05 06:25:29,381 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 453737 transitions. Word has length 39 [2021-06-05 06:25:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:29,381 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 453737 transitions. [2021-06-05 06:25:29,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 06:25:29,381 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 453737 transitions. [2021-06-05 06:25:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:29,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:29,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:29,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 06:25:29,820 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash 993306421, now seen corresponding path program 80 times [2021-06-05 06:25:29,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:29,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503945859] [2021-06-05 06:25:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:29,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503945859] [2021-06-05 06:25:29,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503945859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:29,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275392898] [2021-06-05 06:25:29,942 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 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 06:25:29,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:25:29,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:25:29,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:30,822 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:30,822 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 57 treesize of output 39 [2021-06-05 06:25:30,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:30,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:30,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:25:30,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:25:30,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:30,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:30,868 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 50 treesize of output 14 [2021-06-05 06:25:30,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:30,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:30,876 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 06:25:30,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:25:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:30,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275392898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:30,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:30,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:25:30,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254207992] [2021-06-05 06:25:30,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:25:30,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:25:30,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:25:30,898 INFO L87 Difference]: Start difference. First operand 107696 states and 453737 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:31,877 INFO L93 Difference]: Finished difference Result 139241 states and 588472 transitions. [2021-06-05 06:25:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:25:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:32,909 INFO L225 Difference]: With dead ends: 139241 [2021-06-05 06:25:32,909 INFO L226 Difference]: Without dead ends: 139186 [2021-06-05 06:25:32,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 861.1ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:25:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139186 states. [2021-06-05 06:25:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139186 to 107680. [2021-06-05 06:25:35,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107680 states, 107679 states have (on average 4.21316134065138) internal successors, (453669), 107679 states have internal predecessors, (453669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107680 states to 107680 states and 453669 transitions. [2021-06-05 06:25:36,393 INFO L78 Accepts]: Start accepts. Automaton has 107680 states and 453669 transitions. Word has length 39 [2021-06-05 06:25:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:36,393 INFO L482 AbstractCegarLoop]: Abstraction has 107680 states and 453669 transitions. [2021-06-05 06:25:36,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 107680 states and 453669 transitions. [2021-06-05 06:25:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:36,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:36,638 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:36,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:36,856 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:36,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:36,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1659013173, now seen corresponding path program 81 times [2021-06-05 06:25:36,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:36,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579511429] [2021-06-05 06:25:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:36,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579511429] [2021-06-05 06:25:36,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579511429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:36,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112211098] [2021-06-05 06:25:36,974 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 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 06:25:37,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:25:37,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:37,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:25:37,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:37,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:37,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 39 [2021-06-05 06:25:37,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:37,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,181 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 06:25:37,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:76, output treesize:58 [2021-06-05 06:25:37,296 INFO L446 ElimStorePlain]: Different costs {1=[q1], 3=[v_prenex_3]} [2021-06-05 06:25:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:37,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 06:25:37,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:37,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:37,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,330 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:25:37,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:37,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:37,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:37,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:94, output treesize:32 [2021-06-05 06:25:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:37,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112211098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:37,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:37,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:25:37,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171756728] [2021-06-05 06:25:37,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:25:37,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:25:37,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:25:37,436 INFO L87 Difference]: Start difference. First operand 107680 states and 453669 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:38,855 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-06-05 06:25:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:41,425 INFO L93 Difference]: Finished difference Result 186239 states and 788096 transitions. [2021-06-05 06:25:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:25:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:42,188 INFO L225 Difference]: With dead ends: 186239 [2021-06-05 06:25:42,188 INFO L226 Difference]: Without dead ends: 186129 [2021-06-05 06:25:42,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2068.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:25:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186129 states. [2021-06-05 06:25:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186129 to 106111. [2021-06-05 06:25:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106111 states, 106110 states have (on average 4.214277636415041) internal successors, (447177), 106110 states have internal predecessors, (447177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:46,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106111 states to 106111 states and 447177 transitions. [2021-06-05 06:25:46,516 INFO L78 Accepts]: Start accepts. Automaton has 106111 states and 447177 transitions. Word has length 39 [2021-06-05 06:25:46,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:46,517 INFO L482 AbstractCegarLoop]: Abstraction has 106111 states and 447177 transitions. [2021-06-05 06:25:46,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 106111 states and 447177 transitions. [2021-06-05 06:25:46,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:46,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:46,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:47,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-06-05 06:25:47,104 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:47,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:47,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1057788085, now seen corresponding path program 82 times [2021-06-05 06:25:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:47,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434879883] [2021-06-05 06:25:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:47,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:47,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434879883] [2021-06-05 06:25:47,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434879883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:47,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180873630] [2021-06-05 06:25:47,253 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 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 06:25:47,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:25:47,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:47,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:25:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:47,384 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:25:47,384 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 49 treesize of output 31 [2021-06-05 06:25:47,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:47,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:47,392 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 06:25:47,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:36 [2021-06-05 06:25:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:25:47,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:47,441 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 50 treesize of output 14 [2021-06-05 06:25:47,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:47,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:47,447 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 06:25:47,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:25:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:47,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180873630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:47,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:47,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:25:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857812034] [2021-06-05 06:25:47,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:25:47,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:47,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:25:47,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:25:47,470 INFO L87 Difference]: Start difference. First operand 106111 states and 447177 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:49,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:49,100 INFO L93 Difference]: Finished difference Result 141727 states and 596671 transitions. [2021-06-05 06:25:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:25:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:49,640 INFO L225 Difference]: With dead ends: 141727 [2021-06-05 06:25:49,641 INFO L226 Difference]: Without dead ends: 141488 [2021-06-05 06:25:49,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 287.3ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:25:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141488 states. [2021-06-05 06:25:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141488 to 106719. [2021-06-05 06:25:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106719 states, 106718 states have (on average 4.213675293764876) internal successors, (449675), 106718 states have internal predecessors, (449675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106719 states to 106719 states and 449675 transitions. [2021-06-05 06:25:52,961 INFO L78 Accepts]: Start accepts. Automaton has 106719 states and 449675 transitions. Word has length 39 [2021-06-05 06:25:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:25:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 106719 states and 449675 transitions. [2021-06-05 06:25:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 106719 states and 449675 transitions. [2021-06-05 06:25:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:25:53,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:25:53,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:25:53,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:25:53,419 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:25:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:25:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1096231905, now seen corresponding path program 83 times [2021-06-05 06:25:53,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:25:53,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063162911] [2021-06-05 06:25:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:25:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:25:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:25:53,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:25:53,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063162911] [2021-06-05 06:25:53,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063162911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:53,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597460112] [2021-06-05 06:25:53,549 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 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 06:25:53,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:25:53,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:25:53,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:25:53,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:25:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:53,756 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 71 [2021-06-05 06:25:53,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:53,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:53,792 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 06:25:53,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:53 [2021-06-05 06:25:53,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:25:53,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:25:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:25:53,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:53,868 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-06-05 06:25:54,446 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:25:54,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:25:54,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:25:54,474 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:83, output treesize:38 [2021-06-05 06:25:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:25:54,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597460112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:25:54,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:25:54,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:25:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532155934] [2021-06-05 06:25:54,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:25:54,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:25:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:25:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:25:54,591 INFO L87 Difference]: Start difference. First operand 106719 states and 449675 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:25:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:25:58,310 INFO L93 Difference]: Finished difference Result 253091 states and 1068842 transitions. [2021-06-05 06:25:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:25:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:25:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:25:59,850 INFO L225 Difference]: With dead ends: 253091 [2021-06-05 06:25:59,850 INFO L226 Difference]: Without dead ends: 252972 [2021-06-05 06:25:59,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 1715.4ms TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:26:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252972 states. [2021-06-05 06:26:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252972 to 115389. [2021-06-05 06:26:04,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115389 states, 115388 states have (on average 4.225335390161889) internal successors, (487553), 115388 states have internal predecessors, (487553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115389 states to 115389 states and 487553 transitions. [2021-06-05 06:26:04,873 INFO L78 Accepts]: Start accepts. Automaton has 115389 states and 487553 transitions. Word has length 39 [2021-06-05 06:26:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:04,873 INFO L482 AbstractCegarLoop]: Abstraction has 115389 states and 487553 transitions. [2021-06-05 06:26:04,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:04,873 INFO L276 IsEmpty]: Start isEmpty. Operand 115389 states and 487553 transitions. [2021-06-05 06:26:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:05,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:05,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:05,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-05 06:26:05,315 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:05,315 INFO L82 PathProgramCache]: Analyzing trace with hash 217354315, now seen corresponding path program 84 times [2021-06-05 06:26:05,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:05,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056472582] [2021-06-05 06:26:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:05,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:05,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056472582] [2021-06-05 06:26:05,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056472582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:05,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743219264] [2021-06-05 06:26:05,442 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 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 06:26:05,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:26:05,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:05,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:26:05,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:05,585 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:05,585 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 39 treesize of output 21 [2021-06-05 06:26:05,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:05,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:05,591 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 06:26:05,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:20 [2021-06-05 06:26:05,671 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:26:05,671 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 44 treesize of output 40 [2021-06-05 06:26:05,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:05,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:05,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:05,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 06:26:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:05,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743219264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:05,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:05,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:26:05,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969951751] [2021-06-05 06:26:05,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:26:05,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:05,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:26:05,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:26:05,728 INFO L87 Difference]: Start difference. First operand 115389 states and 487553 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:07,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:07,735 INFO L93 Difference]: Finished difference Result 165278 states and 699762 transitions. [2021-06-05 06:26:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:26:07,735 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:08,739 INFO L225 Difference]: With dead ends: 165278 [2021-06-05 06:26:08,739 INFO L226 Difference]: Without dead ends: 165103 [2021-06-05 06:26:08,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:26:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165103 states. [2021-06-05 06:26:12,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165103 to 115539. [2021-06-05 06:26:12,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115539 states, 115538 states have (on average 4.2249736017587285) internal successors, (488145), 115538 states have internal predecessors, (488145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115539 states to 115539 states and 488145 transitions. [2021-06-05 06:26:13,477 INFO L78 Accepts]: Start accepts. Automaton has 115539 states and 488145 transitions. Word has length 39 [2021-06-05 06:26:13,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:13,477 INFO L482 AbstractCegarLoop]: Abstraction has 115539 states and 488145 transitions. [2021-06-05 06:26:13,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:13,477 INFO L276 IsEmpty]: Start isEmpty. Operand 115539 states and 488145 transitions. [2021-06-05 06:26:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:13,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:13,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:13,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 06:26:13,942 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:13,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1534191097, now seen corresponding path program 85 times [2021-06-05 06:26:13,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:13,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140544054] [2021-06-05 06:26:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:14,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:14,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140544054] [2021-06-05 06:26:14,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140544054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:14,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287571112] [2021-06-05 06:26:14,055 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 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 06:26:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:26:14,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:14,160 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:14,160 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 39 treesize of output 21 [2021-06-05 06:26:14,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:14,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:14,167 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 06:26:14,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:30 [2021-06-05 06:26:16,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:16,390 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 50 treesize of output 14 [2021-06-05 06:26:16,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:16,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:16,403 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 06:26:16,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:26:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:16,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287571112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:16,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:16,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 06:26:16,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863058411] [2021-06-05 06:26:16,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:26:16,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:16,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:26:16,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-06-05 06:26:16,433 INFO L87 Difference]: Start difference. First operand 115539 states and 488145 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:17,983 INFO L93 Difference]: Finished difference Result 141717 states and 599894 transitions. [2021-06-05 06:26:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:26:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:18,495 INFO L225 Difference]: With dead ends: 141717 [2021-06-05 06:26:18,495 INFO L226 Difference]: Without dead ends: 141662 [2021-06-05 06:26:18,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2328.6ms TimeCoverageRelationStatistics Valid=34, Invalid=147, Unknown=1, NotChecked=0, Total=182 [2021-06-05 06:26:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141662 states. [2021-06-05 06:26:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141662 to 115539. [2021-06-05 06:26:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115539 states, 115538 states have (on average 4.2249736017587285) internal successors, (488145), 115538 states have internal predecessors, (488145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115539 states to 115539 states and 488145 transitions. [2021-06-05 06:26:21,753 INFO L78 Accepts]: Start accepts. Automaton has 115539 states and 488145 transitions. Word has length 39 [2021-06-05 06:26:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:21,753 INFO L482 AbstractCegarLoop]: Abstraction has 115539 states and 488145 transitions. [2021-06-05 06:26:21,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 115539 states and 488145 transitions. [2021-06-05 06:26:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:22,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:22,634 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:22,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:22,849 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1599489633, now seen corresponding path program 86 times [2021-06-05 06:26:22,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:22,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060471369] [2021-06-05 06:26:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:23,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:23,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060471369] [2021-06-05 06:26:23,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060471369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:23,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811719640] [2021-06-05 06:26:23,000 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 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 06:26:23,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:26:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:26:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:23,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:23,227 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 68 treesize of output 40 [2021-06-05 06:26:23,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:23,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:23,239 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 06:26:23,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:36 [2021-06-05 06:26:23,268 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:23,268 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 14 [2021-06-05 06:26:23,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:23,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:23,273 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 06:26:23,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:26:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:23,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811719640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:23,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:23,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:26:23,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883701296] [2021-06-05 06:26:23,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:26:23,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:23,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:26:23,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:26:23,305 INFO L87 Difference]: Start difference. First operand 115539 states and 488145 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:25,075 INFO L93 Difference]: Finished difference Result 146932 states and 622127 transitions. [2021-06-05 06:26:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:26:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:25,622 INFO L225 Difference]: With dead ends: 146932 [2021-06-05 06:26:25,622 INFO L226 Difference]: Without dead ends: 146877 [2021-06-05 06:26:25,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:26:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146877 states. [2021-06-05 06:26:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146877 to 116071. [2021-06-05 06:26:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116071 states, 116070 states have (on average 4.226113552166796) internal successors, (490525), 116070 states have internal predecessors, (490525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116071 states to 116071 states and 490525 transitions. [2021-06-05 06:26:29,048 INFO L78 Accepts]: Start accepts. Automaton has 116071 states and 490525 transitions. Word has length 39 [2021-06-05 06:26:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:29,048 INFO L482 AbstractCegarLoop]: Abstraction has 116071 states and 490525 transitions. [2021-06-05 06:26:29,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:29,048 INFO L276 IsEmpty]: Start isEmpty. Operand 116071 states and 490525 transitions. [2021-06-05 06:26:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:29,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:29,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:29,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:26:29,514 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:29,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2136982489, now seen corresponding path program 87 times [2021-06-05 06:26:29,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:29,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679663162] [2021-06-05 06:26:29,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:29,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679663162] [2021-06-05 06:26:29,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679663162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416382609] [2021-06-05 06:26:29,644 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 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 06:26:29,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:26:29,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:29,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:26:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:30,575 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:26:30,575 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 49 treesize of output 53 [2021-06-05 06:26:30,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:30,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:30,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:30,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:76, output treesize:56 [2021-06-05 06:26:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:30,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:30,669 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:26:30,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:30,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-06-05 06:26:30,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:30,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:30,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:26:30,705 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:94, output treesize:32 [2021-06-05 06:26:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416382609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:30,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:30,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:26:30,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612191140] [2021-06-05 06:26:30,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:26:30,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:26:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:26:30,779 INFO L87 Difference]: Start difference. First operand 116071 states and 490525 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:26:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:33,183 INFO L93 Difference]: Finished difference Result 176853 states and 746682 transitions. [2021-06-05 06:26:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:26:33,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 39 [2021-06-05 06:26:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:33,805 INFO L225 Difference]: With dead ends: 176853 [2021-06-05 06:26:33,806 INFO L226 Difference]: Without dead ends: 176743 [2021-06-05 06:26:33,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1554.3ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:26:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176743 states. [2021-06-05 06:26:36,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176743 to 116698. [2021-06-05 06:26:37,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116698 states, 116697 states have (on average 4.226209756891779) internal successors, (493186), 116697 states have internal predecessors, (493186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116698 states to 116698 states and 493186 transitions. [2021-06-05 06:26:38,136 INFO L78 Accepts]: Start accepts. Automaton has 116698 states and 493186 transitions. Word has length 39 [2021-06-05 06:26:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:38,136 INFO L482 AbstractCegarLoop]: Abstraction has 116698 states and 493186 transitions. [2021-06-05 06:26:38,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:26:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 116698 states and 493186 transitions. [2021-06-05 06:26:38,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:38,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:38,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:38,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-05 06:26:38,642 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:38,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:38,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1799811683, now seen corresponding path program 88 times [2021-06-05 06:26:38,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:38,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111710768] [2021-06-05 06:26:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:38,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:38,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111710768] [2021-06-05 06:26:38,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111710768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:38,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024702038] [2021-06-05 06:26:38,778 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 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 06:26:38,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:26:38,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:38,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:26:38,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:38,922 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:38,922 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 47 treesize of output 29 [2021-06-05 06:26:38,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:38,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:38,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:38,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:42 [2021-06-05 06:26:38,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:38,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:38,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:38,997 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 50 treesize of output 14 [2021-06-05 06:26:38,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:39,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:39,004 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 06:26:39,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:26:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:39,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024702038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:39,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:39,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:26:39,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002455574] [2021-06-05 06:26:39,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:26:39,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:39,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:26:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:26:39,029 INFO L87 Difference]: Start difference. First operand 116698 states and 493186 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:40,667 INFO L93 Difference]: Finished difference Result 143374 states and 607141 transitions. [2021-06-05 06:26:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:26:40,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:41,179 INFO L225 Difference]: With dead ends: 143374 [2021-06-05 06:26:41,179 INFO L226 Difference]: Without dead ends: 143319 [2021-06-05 06:26:41,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:26:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143319 states. [2021-06-05 06:26:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143319 to 116182. [2021-06-05 06:26:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116182 states, 116181 states have (on average 4.225079832330588) internal successors, (490874), 116181 states have internal predecessors, (490874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116182 states to 116182 states and 490874 transitions. [2021-06-05 06:26:44,462 INFO L78 Accepts]: Start accepts. Automaton has 116182 states and 490874 transitions. Word has length 39 [2021-06-05 06:26:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:44,462 INFO L482 AbstractCegarLoop]: Abstraction has 116182 states and 490874 transitions. [2021-06-05 06:26:44,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 116182 states and 490874 transitions. [2021-06-05 06:26:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:45,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:45,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:45,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 06:26:45,617 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1873572973, now seen corresponding path program 89 times [2021-06-05 06:26:45,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:45,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714272837] [2021-06-05 06:26:45,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:45,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:45,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714272837] [2021-06-05 06:26:45,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714272837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:45,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158854792] [2021-06-05 06:26:45,867 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 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 06:26:45,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:26:45,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:45,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:26:45,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:46,099 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:46,100 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 17 [2021-06-05 06:26:46,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:46,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:46,109 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 06:26:46,109 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:29 [2021-06-05 06:26:46,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:46,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:46,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:46,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:26:46,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 06:26:46,182 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:46,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:46,187 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 06:26:46,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:3 [2021-06-05 06:26:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158854792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:46,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:46,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:26:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918699427] [2021-06-05 06:26:46,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:26:46,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:26:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:26:46,209 INFO L87 Difference]: Start difference. First operand 116182 states and 490874 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:48,208 INFO L93 Difference]: Finished difference Result 169461 states and 708390 transitions. [2021-06-05 06:26:48,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:26:48,208 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:26:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:48,798 INFO L225 Difference]: With dead ends: 169461 [2021-06-05 06:26:48,799 INFO L226 Difference]: Without dead ends: 168601 [2021-06-05 06:26:48,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 541.4ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:26:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168601 states. [2021-06-05 06:26:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168601 to 117650. [2021-06-05 06:26:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117650 states, 117649 states have (on average 4.223520811906604) internal successors, (496893), 117649 states have internal predecessors, (496893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117650 states to 117650 states and 496893 transitions. [2021-06-05 06:26:53,032 INFO L78 Accepts]: Start accepts. Automaton has 117650 states and 496893 transitions. Word has length 39 [2021-06-05 06:26:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:26:53,032 INFO L482 AbstractCegarLoop]: Abstraction has 117650 states and 496893 transitions. [2021-06-05 06:26:53,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:26:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 117650 states and 496893 transitions. [2021-06-05 06:26:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:26:53,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:26:53,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:26:53,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 06:26:53,650 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:26:53,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:26:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash 913413037, now seen corresponding path program 90 times [2021-06-05 06:26:53,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:26:53,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597472538] [2021-06-05 06:26:53,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:26:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:26:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:53,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:26:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597472538] [2021-06-05 06:26:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597472538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112178855] [2021-06-05 06:26:53,875 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 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 06:26:53,908 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:26:53,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:26:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:26:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:26:54,068 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:26:54,068 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 45 treesize of output 27 [2021-06-05 06:26:54,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:26:54,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:54,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:26:54,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:32 [2021-06-05 06:26:54,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:26:54,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:54,149 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 06:26:54,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:26:54,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:26:54,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 06:26:54,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:21 [2021-06-05 06:26:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:26:54,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112178855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:26:54,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:26:54,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:26:54,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759508290] [2021-06-05 06:26:54,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:26:54,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:26:54,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:26:54,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:26:54,229 INFO L87 Difference]: Start difference. First operand 117650 states and 496893 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:26:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:26:56,590 INFO L93 Difference]: Finished difference Result 180970 states and 759882 transitions. [2021-06-05 06:26:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:26:56,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 39 [2021-06-05 06:26:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:26:57,222 INFO L225 Difference]: With dead ends: 180970 [2021-06-05 06:26:57,222 INFO L226 Difference]: Without dead ends: 180519 [2021-06-05 06:26:57,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 773.5ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:26:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180519 states. [2021-06-05 06:27:00,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180519 to 117746. [2021-06-05 06:27:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117746 states, 117745 states have (on average 4.223576372669752) internal successors, (497305), 117745 states have internal predecessors, (497305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117746 states to 117746 states and 497305 transitions. [2021-06-05 06:27:01,577 INFO L78 Accepts]: Start accepts. Automaton has 117746 states and 497305 transitions. Word has length 39 [2021-06-05 06:27:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:01,577 INFO L482 AbstractCegarLoop]: Abstraction has 117746 states and 497305 transitions. [2021-06-05 06:27:01,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:27:01,577 INFO L276 IsEmpty]: Start isEmpty. Operand 117746 states and 497305 transitions. [2021-06-05 06:27:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:01,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:01,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:02,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 06:27:02,031 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -205612563, now seen corresponding path program 91 times [2021-06-05 06:27:02,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:02,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090514227] [2021-06-05 06:27:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:02,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:02,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090514227] [2021-06-05 06:27:02,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090514227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:02,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700250396] [2021-06-05 06:27:02,261 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 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 06:27:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:02,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:27:02,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:02,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:02,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:02,473 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 47 treesize of output 27 [2021-06-05 06:27:02,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,484 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 06:27:02,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:38 [2021-06-05 06:27:02,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:02,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:02,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:02,554 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 50 treesize of output 14 [2021-06-05 06:27:02,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:02,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:02,560 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 06:27:02,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:27:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:02,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700250396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:02,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:02,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:27:02,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419813491] [2021-06-05 06:27:02,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:27:02,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:02,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:27:02,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:27:02,582 INFO L87 Difference]: Start difference. First operand 117746 states and 497305 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:04,700 INFO L93 Difference]: Finished difference Result 155617 states and 650444 transitions. [2021-06-05 06:27:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:27:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:05,499 INFO L225 Difference]: With dead ends: 155617 [2021-06-05 06:27:05,499 INFO L226 Difference]: Without dead ends: 155425 [2021-06-05 06:27:05,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:27:05,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155425 states. [2021-06-05 06:27:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155425 to 118594. [2021-06-05 06:27:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118594 states, 118593 states have (on average 4.222070442606225) internal successors, (500708), 118593 states have internal predecessors, (500708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118594 states to 118594 states and 500708 transitions. [2021-06-05 06:27:09,686 INFO L78 Accepts]: Start accepts. Automaton has 118594 states and 500708 transitions. Word has length 39 [2021-06-05 06:27:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:09,686 INFO L482 AbstractCegarLoop]: Abstraction has 118594 states and 500708 transitions. [2021-06-05 06:27:09,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 118594 states and 500708 transitions. [2021-06-05 06:27:10,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:10,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:10,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:10,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:10,351 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:10,352 INFO L82 PathProgramCache]: Analyzing trace with hash -600793637, now seen corresponding path program 92 times [2021-06-05 06:27:10,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:10,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51365587] [2021-06-05 06:27:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:10,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51365587] [2021-06-05 06:27:10,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51365587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439886041] [2021-06-05 06:27:10,514 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 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 06:27:10,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:27:10,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:10,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:27:10,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,790 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 54 [2021-06-05 06:27:10,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:10,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:10,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:86, output treesize:46 [2021-06-05 06:27:10,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:10,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,902 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2021-06-05 06:27:10,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:10,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:10,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:10,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:22 [2021-06-05 06:27:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:10,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439886041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:10,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:10,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 06:27:10,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344051083] [2021-06-05 06:27:10,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:27:10,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:10,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:27:10,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:27:10,990 INFO L87 Difference]: Start difference. First operand 118594 states and 500708 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:14,047 INFO L93 Difference]: Finished difference Result 191060 states and 801497 transitions. [2021-06-05 06:27:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:27:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:15,314 INFO L225 Difference]: With dead ends: 191060 [2021-06-05 06:27:15,314 INFO L226 Difference]: Without dead ends: 190427 [2021-06-05 06:27:15,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 921.1ms TimeCoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:27:15,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190427 states. [2021-06-05 06:27:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190427 to 122306. [2021-06-05 06:27:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122306 states, 122305 states have (on average 4.215657577368055) internal successors, (515596), 122305 states have internal predecessors, (515596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122306 states to 122306 states and 515596 transitions. [2021-06-05 06:27:19,195 INFO L78 Accepts]: Start accepts. Automaton has 122306 states and 515596 transitions. Word has length 39 [2021-06-05 06:27:19,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:19,195 INFO L482 AbstractCegarLoop]: Abstraction has 122306 states and 515596 transitions. [2021-06-05 06:27:19,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:19,195 INFO L276 IsEmpty]: Start isEmpty. Operand 122306 states and 515596 transitions. [2021-06-05 06:27:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:20,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:20,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:20,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:20,412 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1945473573, now seen corresponding path program 93 times [2021-06-05 06:27:20,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:20,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047609423] [2021-06-05 06:27:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:20,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047609423] [2021-06-05 06:27:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047609423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966038267] [2021-06-05 06:27:20,590 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 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 06:27:20,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:27:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:20,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:27:20,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:20,830 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:27:20,830 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 64 treesize of output 60 [2021-06-05 06:27:20,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:20,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:20,850 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 06:27:20,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:58 [2021-06-05 06:27:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:27:20,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:20,910 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:20,910 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 06:27:20,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:20,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:20,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:20,938 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:82, output treesize:41 [2021-06-05 06:27:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:21,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966038267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:21,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:21,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:27:21,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938120355] [2021-06-05 06:27:21,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:27:21,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:21,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:27:21,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:27:21,039 INFO L87 Difference]: Start difference. First operand 122306 states and 515596 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:23,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:23,956 INFO L93 Difference]: Finished difference Result 203137 states and 855397 transitions. [2021-06-05 06:27:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:27:23,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:23,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:24,678 INFO L225 Difference]: With dead ends: 203137 [2021-06-05 06:27:24,678 INFO L226 Difference]: Without dead ends: 202974 [2021-06-05 06:27:24,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1277.0ms TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:27:25,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202974 states. [2021-06-05 06:27:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202974 to 123310. [2021-06-05 06:27:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123310 states, 123309 states have (on average 4.216237257621098) internal successors, (519900), 123309 states have internal predecessors, (519900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123310 states to 123310 states and 519900 transitions. [2021-06-05 06:27:29,148 INFO L78 Accepts]: Start accepts. Automaton has 123310 states and 519900 transitions. Word has length 39 [2021-06-05 06:27:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:29,148 INFO L482 AbstractCegarLoop]: Abstraction has 123310 states and 519900 transitions. [2021-06-05 06:27:29,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:29,148 INFO L276 IsEmpty]: Start isEmpty. Operand 123310 states and 519900 transitions. [2021-06-05 06:27:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:30,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:30,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:30,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-06-05 06:27:30,397 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:30,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:30,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1500871251, now seen corresponding path program 94 times [2021-06-05 06:27:30,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:30,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997746962] [2021-06-05 06:27:30,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:30,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997746962] [2021-06-05 06:27:30,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997746962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:30,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790502976] [2021-06-05 06:27:30,572 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 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 06:27:30,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:27:30,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:27:30,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:30,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:30,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:30,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:30,802 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 59 treesize of output 39 [2021-06-05 06:27:30,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:30,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:30,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:30,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:52 [2021-06-05 06:27:30,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:30,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:30,847 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 50 treesize of output 14 [2021-06-05 06:27:30,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:30,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:30,853 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 06:27:30,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:27:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:30,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790502976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:30,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:30,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:27:30,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424859781] [2021-06-05 06:27:30,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:27:30,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:27:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:27:30,878 INFO L87 Difference]: Start difference. First operand 123310 states and 519900 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:32,731 INFO L93 Difference]: Finished difference Result 170672 states and 718545 transitions. [2021-06-05 06:27:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:27:32,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:33,334 INFO L225 Difference]: With dead ends: 170672 [2021-06-05 06:27:33,334 INFO L226 Difference]: Without dead ends: 170582 [2021-06-05 06:27:33,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:27:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170582 states. [2021-06-05 06:27:36,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170582 to 124128. [2021-06-05 06:27:36,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124128 states, 124127 states have (on average 4.217583603889564) internal successors, (523516), 124127 states have internal predecessors, (523516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:37,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124128 states to 124128 states and 523516 transitions. [2021-06-05 06:27:37,679 INFO L78 Accepts]: Start accepts. Automaton has 124128 states and 523516 transitions. Word has length 39 [2021-06-05 06:27:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:37,679 INFO L482 AbstractCegarLoop]: Abstraction has 124128 states and 523516 transitions. [2021-06-05 06:27:37,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 124128 states and 523516 transitions. [2021-06-05 06:27:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:38,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:38,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:38,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 06:27:38,222 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1212222615, now seen corresponding path program 95 times [2021-06-05 06:27:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:38,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850455194] [2021-06-05 06:27:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:38,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:38,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850455194] [2021-06-05 06:27:38,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850455194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:38,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771656580] [2021-06-05 06:27:38,420 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 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 06:27:38,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:27:38,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:27:38,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:38,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:38,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:38,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:38,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-06-05 06:27:38,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:38,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:38,621 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 06:27:38,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:19 [2021-06-05 06:27:38,660 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:38,660 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 21 treesize of output 9 [2021-06-05 06:27:38,661 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:38,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:38,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:38,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:7 [2021-06-05 06:27:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:38,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771656580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:38,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:38,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 06:27:38,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20507955] [2021-06-05 06:27:38,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:27:38,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:27:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:27:38,687 INFO L87 Difference]: Start difference. First operand 124128 states and 523516 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:40,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:40,633 INFO L93 Difference]: Finished difference Result 157703 states and 663316 transitions. [2021-06-05 06:27:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:27:40,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:41,223 INFO L225 Difference]: With dead ends: 157703 [2021-06-05 06:27:41,223 INFO L226 Difference]: Without dead ends: 157613 [2021-06-05 06:27:41,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 444.1ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:27:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157613 states. [2021-06-05 06:27:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157613 to 124402. [2021-06-05 06:27:44,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124402 states, 124401 states have (on average 4.217924293213077) internal successors, (524714), 124401 states have internal predecessors, (524714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124402 states to 124402 states and 524714 transitions. [2021-06-05 06:27:45,442 INFO L78 Accepts]: Start accepts. Automaton has 124402 states and 524714 transitions. Word has length 39 [2021-06-05 06:27:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:45,442 INFO L482 AbstractCegarLoop]: Abstraction has 124402 states and 524714 transitions. [2021-06-05 06:27:45,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 124402 states and 524714 transitions. [2021-06-05 06:27:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:45,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:45,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:45,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:27:45,944 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash -721998227, now seen corresponding path program 96 times [2021-06-05 06:27:45,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:45,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049533352] [2021-06-05 06:27:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:46,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:46,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049533352] [2021-06-05 06:27:46,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049533352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:46,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888105018] [2021-06-05 06:27:46,110 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 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 06:27:46,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:27:46,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:27:46,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 06:27:46,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:46,266 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:27:46,266 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 45 treesize of output 27 [2021-06-05 06:27:46,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:46,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:46,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:27:46,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:50, output treesize:24 [2021-06-05 06:27:46,331 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:27:46,331 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 44 treesize of output 40 [2021-06-05 06:27:46,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:27:46,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:46,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:27:46,348 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 06:27:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:46,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888105018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:46,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:46,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 06:27:46,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087620676] [2021-06-05 06:27:46,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:27:46,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:46,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:27:46,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:27:46,399 INFO L87 Difference]: Start difference. First operand 124402 states and 524714 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:27:48,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:48,735 INFO L93 Difference]: Finished difference Result 186267 states and 781942 transitions. [2021-06-05 06:27:48,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:27:48,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 39 [2021-06-05 06:27:48,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:49,800 INFO L225 Difference]: With dead ends: 186267 [2021-06-05 06:27:49,801 INFO L226 Difference]: Without dead ends: 185816 [2021-06-05 06:27:49,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 728.1ms TimeCoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:27:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185816 states. [2021-06-05 06:27:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185816 to 124342. [2021-06-05 06:27:53,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124342 states, 124341 states have (on average 4.217981196869898) internal successors, (524468), 124341 states have internal predecessors, (524468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:53,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124342 states to 124342 states and 524468 transitions. [2021-06-05 06:27:53,551 INFO L78 Accepts]: Start accepts. Automaton has 124342 states and 524468 transitions. Word has length 39 [2021-06-05 06:27:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:27:53,551 INFO L482 AbstractCegarLoop]: Abstraction has 124342 states and 524468 transitions. [2021-06-05 06:27:53,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 06:27:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 124342 states and 524468 transitions. [2021-06-05 06:27:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:27:53,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:27:53,810 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:27:54,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 06:27:54,011 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:27:54,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:27:54,011 INFO L82 PathProgramCache]: Analyzing trace with hash 77620905, now seen corresponding path program 97 times [2021-06-05 06:27:54,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:27:54,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196057957] [2021-06-05 06:27:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:27:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:54,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:27:54,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196057957] [2021-06-05 06:27:54,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196057957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:54,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702022992] [2021-06-05 06:27:54,162 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 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 06:27:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:27:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:27:54,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:27:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:54,325 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 41 treesize of output 21 [2021-06-05 06:27:54,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:54,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:54,339 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 06:27:54,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:30 [2021-06-05 06:27:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:27:55,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:27:55,030 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 50 treesize of output 14 [2021-06-05 06:27:55,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:27:55,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:27:55,039 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 06:27:55,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:27:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:27:55,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702022992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:27:55,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:27:55,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:27:55,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493965408] [2021-06-05 06:27:55,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:27:55,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:27:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:27:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:27:55,098 INFO L87 Difference]: Start difference. First operand 124342 states and 524468 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:27:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:27:56,245 INFO L93 Difference]: Finished difference Result 150913 states and 631324 transitions. [2021-06-05 06:27:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:27:56,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:27:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:27:57,321 INFO L225 Difference]: With dead ends: 150913 [2021-06-05 06:27:57,321 INFO L226 Difference]: Without dead ends: 150644 [2021-06-05 06:27:57,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:27:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150644 states. [2021-06-05 06:28:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150644 to 124604. [2021-06-05 06:28:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124604 states, 124603 states have (on average 4.217956228983251) internal successors, (525570), 124603 states have internal predecessors, (525570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124604 states to 124604 states and 525570 transitions. [2021-06-05 06:28:01,462 INFO L78 Accepts]: Start accepts. Automaton has 124604 states and 525570 transitions. Word has length 39 [2021-06-05 06:28:01,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:01,462 INFO L482 AbstractCegarLoop]: Abstraction has 124604 states and 525570 transitions. [2021-06-05 06:28:01,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 124604 states and 525570 transitions. [2021-06-05 06:28:01,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:01,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:01,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:02,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:02,041 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1204692115, now seen corresponding path program 98 times [2021-06-05 06:28:02,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:02,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516466409] [2021-06-05 06:28:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:02,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:02,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516466409] [2021-06-05 06:28:02,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516466409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:02,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785084334] [2021-06-05 06:28:02,911 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 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 06:28:03,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:28:03,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:03,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:28:03,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:03,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:03,237 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 41 treesize of output 21 [2021-06-05 06:28:03,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,250 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 06:28:03,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:30 [2021-06-05 06:28:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:03,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:03,380 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 50 treesize of output 14 [2021-06-05 06:28:03,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:03,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:03,388 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 06:28:03,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:28:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:03,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785084334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:03,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:03,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 06:28:03,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890393951] [2021-06-05 06:28:03,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:28:03,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:03,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:28:03,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:28:03,434 INFO L87 Difference]: Start difference. First operand 124604 states and 525570 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:04,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:04,645 INFO L93 Difference]: Finished difference Result 155019 states and 651444 transitions. [2021-06-05 06:28:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:28:04,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:04,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:05,743 INFO L225 Difference]: With dead ends: 155019 [2021-06-05 06:28:05,743 INFO L226 Difference]: Without dead ends: 154929 [2021-06-05 06:28:05,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1066.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:28:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154929 states. [2021-06-05 06:28:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154929 to 124536. [2021-06-05 06:28:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124536 states, 124535 states have (on average 4.2186052113863575) internal successors, (525364), 124535 states have internal predecessors, (525364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124536 states to 124536 states and 525364 transitions. [2021-06-05 06:28:09,496 INFO L78 Accepts]: Start accepts. Automaton has 124536 states and 525364 transitions. Word has length 39 [2021-06-05 06:28:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:09,496 INFO L482 AbstractCegarLoop]: Abstraction has 124536 states and 525364 transitions. [2021-06-05 06:28:09,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 124536 states and 525364 transitions. [2021-06-05 06:28:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:09,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:09,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:09,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:09,977 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1030940455, now seen corresponding path program 99 times [2021-06-05 06:28:09,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:09,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675326348] [2021-06-05 06:28:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:10,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675326348] [2021-06-05 06:28:10,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675326348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:10,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307054269] [2021-06-05 06:28:10,967 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 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 06:28:10,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:28:11,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:11,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:28:11,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:11,208 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:28:11,208 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 64 treesize of output 60 [2021-06-05 06:28:11,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:11,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:11,232 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 06:28:11,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:46 [2021-06-05 06:28:11,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:11,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2021-06-05 06:28:11,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:11,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:11,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:11,294 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-06-05 06:28:11,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:11,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:11,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:11,315 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:41 [2021-06-05 06:28:11,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:11,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307054269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:11,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:11,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:28:11,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581475650] [2021-06-05 06:28:11,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:28:11,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:11,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:28:11,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:28:11,402 INFO L87 Difference]: Start difference. First operand 124536 states and 525364 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:14,628 INFO L93 Difference]: Finished difference Result 223951 states and 945036 transitions. [2021-06-05 06:28:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:28:14,628 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:16,053 INFO L225 Difference]: With dead ends: 223951 [2021-06-05 06:28:16,053 INFO L226 Difference]: Without dead ends: 223791 [2021-06-05 06:28:16,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1544.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:28:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223791 states. [2021-06-05 06:28:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223791 to 124234. [2021-06-05 06:28:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124234 states, 124233 states have (on average 4.217365756280538) internal successors, (523936), 124233 states have internal predecessors, (523936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124234 states to 124234 states and 523936 transitions. [2021-06-05 06:28:20,994 INFO L78 Accepts]: Start accepts. Automaton has 124234 states and 523936 transitions. Word has length 39 [2021-06-05 06:28:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:20,994 INFO L482 AbstractCegarLoop]: Abstraction has 124234 states and 523936 transitions. [2021-06-05 06:28:20,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 124234 states and 523936 transitions. [2021-06-05 06:28:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:21,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:21,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:21,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:21,551 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash 339564365, now seen corresponding path program 100 times [2021-06-05 06:28:21,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:21,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089048823] [2021-06-05 06:28:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:21,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:21,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089048823] [2021-06-05 06:28:21,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089048823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:21,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198622433] [2021-06-05 06:28:21,682 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 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 06:28:21,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:28:21,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:21,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:28:21,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:21,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:21,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:21,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:21,892 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 59 treesize of output 39 [2021-06-05 06:28:21,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:21,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:21,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:28:21,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:52 [2021-06-05 06:28:21,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:21,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:21,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:21,938 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 50 treesize of output 14 [2021-06-05 06:28:21,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:21,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:21,945 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 06:28:21,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:28:21,973 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:21,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198622433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:21,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:21,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:28:21,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604737579] [2021-06-05 06:28:21,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:28:21,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:21,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:28:21,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:28:21,974 INFO L87 Difference]: Start difference. First operand 124234 states and 523936 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 06:28:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:23,849 INFO L93 Difference]: Finished difference Result 164785 states and 693473 transitions. [2021-06-05 06:28:23,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:28:23,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 39 [2021-06-05 06:28:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:24,460 INFO L225 Difference]: With dead ends: 164785 [2021-06-05 06:28:24,460 INFO L226 Difference]: Without dead ends: 164695 [2021-06-05 06:28:24,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:28:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164695 states. [2021-06-05 06:28:27,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164695 to 123327. [2021-06-05 06:28:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123327 states, 123326 states have (on average 4.217172372411333) internal successors, (520087), 123326 states have internal predecessors, (520087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:29,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123327 states to 123327 states and 520087 transitions. [2021-06-05 06:28:29,007 INFO L78 Accepts]: Start accepts. Automaton has 123327 states and 520087 transitions. Word has length 39 [2021-06-05 06:28:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:29,007 INFO L482 AbstractCegarLoop]: Abstraction has 123327 states and 520087 transitions. [2021-06-05 06:28:29,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 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 06:28:29,007 INFO L276 IsEmpty]: Start isEmpty. Operand 123327 states and 520087 transitions. [2021-06-05 06:28:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:29,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:29,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:29,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:29,497 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 831476315, now seen corresponding path program 101 times [2021-06-05 06:28:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:29,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73455819] [2021-06-05 06:28:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:29,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:29,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73455819] [2021-06-05 06:28:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73455819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:29,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309947149] [2021-06-05 06:28:29,640 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 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 06:28:29,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:28:29,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:29,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:28:29,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:29,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:29,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:29,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:29,818 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 44 [2021-06-05 06:28:29,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:29,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:29,829 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 06:28:29,830 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:25 [2021-06-05 06:28:29,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:29,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:29,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:29,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:28:29,957 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:28:29,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:29,962 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 06:28:29,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:3 [2021-06-05 06:28:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309947149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:29,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:29,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:28:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107375160] [2021-06-05 06:28:29,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:28:29,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:28:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:28:29,983 INFO L87 Difference]: Start difference. First operand 123327 states and 520087 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:31,863 INFO L93 Difference]: Finished difference Result 140494 states and 588412 transitions. [2021-06-05 06:28:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:28:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:32,336 INFO L225 Difference]: With dead ends: 140494 [2021-06-05 06:28:32,336 INFO L226 Difference]: Without dead ends: 140219 [2021-06-05 06:28:32,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:28:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140219 states. [2021-06-05 06:28:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140219 to 123391. [2021-06-05 06:28:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123391 states, 123390 states have (on average 4.217132668773806) internal successors, (520352), 123390 states have internal predecessors, (520352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:36,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123391 states to 123391 states and 520352 transitions. [2021-06-05 06:28:36,471 INFO L78 Accepts]: Start accepts. Automaton has 123391 states and 520352 transitions. Word has length 39 [2021-06-05 06:28:36,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:36,471 INFO L482 AbstractCegarLoop]: Abstraction has 123391 states and 520352 transitions. [2021-06-05 06:28:36,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 123391 states and 520352 transitions. [2021-06-05 06:28:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:36,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:36,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:36,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable396 [2021-06-05 06:28:36,998 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash -101292443, now seen corresponding path program 102 times [2021-06-05 06:28:36,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:36,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470966741] [2021-06-05 06:28:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:37,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:37,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470966741] [2021-06-05 06:28:37,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470966741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:37,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958394724] [2021-06-05 06:28:37,119 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 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 06:28:37,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:28:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:28:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:37,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:37,250 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 33 [2021-06-05 06:28:37,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:37,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:37,273 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 06:28:37,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:50, output treesize:24 [2021-06-05 06:28:37,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:37,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:37,442 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:28:37,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:37,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:37,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:37,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:28:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:37,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958394724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:37,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:37,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:28:37,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808597685] [2021-06-05 06:28:37,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:28:37,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:28:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:28:37,502 INFO L87 Difference]: Start difference. First operand 123391 states and 520352 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:39,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:39,639 INFO L93 Difference]: Finished difference Result 156311 states and 654685 transitions. [2021-06-05 06:28:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:28:39,639 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:40,166 INFO L225 Difference]: With dead ends: 156311 [2021-06-05 06:28:40,166 INFO L226 Difference]: Without dead ends: 156230 [2021-06-05 06:28:40,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:28:40,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156230 states. [2021-06-05 06:28:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156230 to 123217. [2021-06-05 06:28:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123217 states, 123216 states have (on average 4.21818594987664) internal successors, (519748), 123216 states have internal predecessors, (519748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123217 states to 123217 states and 519748 transitions. [2021-06-05 06:28:44,475 INFO L78 Accepts]: Start accepts. Automaton has 123217 states and 519748 transitions. Word has length 39 [2021-06-05 06:28:44,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:44,475 INFO L482 AbstractCegarLoop]: Abstraction has 123217 states and 519748 transitions. [2021-06-05 06:28:44,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:44,475 INFO L276 IsEmpty]: Start isEmpty. Operand 123217 states and 519748 transitions. [2021-06-05 06:28:44,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:44,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:44,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:44,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 06:28:44,936 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:44,937 INFO L82 PathProgramCache]: Analyzing trace with hash 536940103, now seen corresponding path program 103 times [2021-06-05 06:28:44,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:44,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530474490] [2021-06-05 06:28:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:45,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:45,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530474490] [2021-06-05 06:28:45,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530474490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:45,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334427490] [2021-06-05 06:28:45,057 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 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 06:28:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:45,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:28:45,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:45,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:45,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:45,202 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 37 treesize of output 17 [2021-06-05 06:28:45,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:45,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:45,212 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 06:28:45,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:23 [2021-06-05 06:28:45,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:45,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:45,321 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 50 treesize of output 14 [2021-06-05 06:28:45,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:45,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:45,329 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 06:28:45,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:28:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:45,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334427490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:45,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:45,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 06:28:45,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471134164] [2021-06-05 06:28:45,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:28:45,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:28:45,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:28:45,346 INFO L87 Difference]: Start difference. First operand 123217 states and 519748 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 06:28:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:46,897 INFO L93 Difference]: Finished difference Result 144935 states and 609349 transitions. [2021-06-05 06:28:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:28:46,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 39 [2021-06-05 06:28:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:47,378 INFO L225 Difference]: With dead ends: 144935 [2021-06-05 06:28:47,378 INFO L226 Difference]: Without dead ends: 144854 [2021-06-05 06:28:47,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:28:47,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144854 states. [2021-06-05 06:28:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144854 to 123519. [2021-06-05 06:28:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123519 states, 123518 states have (on average 4.2170857688757915) internal successors, (520886), 123518 states have internal predecessors, (520886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123519 states to 123519 states and 520886 transitions. [2021-06-05 06:28:52,082 INFO L78 Accepts]: Start accepts. Automaton has 123519 states and 520886 transitions. Word has length 39 [2021-06-05 06:28:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:28:52,082 INFO L482 AbstractCegarLoop]: Abstraction has 123519 states and 520886 transitions. [2021-06-05 06:28:52,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 06:28:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 123519 states and 520886 transitions. [2021-06-05 06:28:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:28:52,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:28:52,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:28:52,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:28:52,731 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:28:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:28:52,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1823507719, now seen corresponding path program 104 times [2021-06-05 06:28:52,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:28:52,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699391062] [2021-06-05 06:28:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:28:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:28:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:52,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:28:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699391062] [2021-06-05 06:28:52,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699391062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:52,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133260165] [2021-06-05 06:28:52,911 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 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 06:28:52,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:28:52,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:28:52,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:28:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:28:53,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:28:53,106 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 37 treesize of output 17 [2021-06-05 06:28:53,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:28:53,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,119 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 06:28:53,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:25 [2021-06-05 06:28:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:28:53,240 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,241 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:28:53,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:28:53,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:28:53,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:28:53,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:28:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:28:53,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133260165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:28:53,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:28:53,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:28:53,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486065328] [2021-06-05 06:28:53,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:28:53,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:28:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:28:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:28:53,322 INFO L87 Difference]: Start difference. First operand 123519 states and 520886 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:28:55,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:28:55,504 INFO L93 Difference]: Finished difference Result 144261 states and 605249 transitions. [2021-06-05 06:28:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:28:55,505 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:28:55,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:28:56,244 INFO L225 Difference]: With dead ends: 144261 [2021-06-05 06:28:56,245 INFO L226 Difference]: Without dead ends: 143986 [2021-06-05 06:28:56,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:28:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143986 states. [2021-06-05 06:28:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143986 to 123345. [2021-06-05 06:28:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123345 states, 123344 states have (on average 4.217959527824621) internal successors, (520260), 123344 states have internal predecessors, (520260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123345 states to 123345 states and 520260 transitions. [2021-06-05 06:29:00,385 INFO L78 Accepts]: Start accepts. Automaton has 123345 states and 520260 transitions. Word has length 39 [2021-06-05 06:29:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:00,385 INFO L482 AbstractCegarLoop]: Abstraction has 123345 states and 520260 transitions. [2021-06-05 06:29:00,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 123345 states and 520260 transitions. [2021-06-05 06:29:00,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:00,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:00,833 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:01,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 06:29:01,033 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1149977299, now seen corresponding path program 105 times [2021-06-05 06:29:01,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:01,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491229502] [2021-06-05 06:29:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:01,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:01,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491229502] [2021-06-05 06:29:01,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491229502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:01,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501998968] [2021-06-05 06:29:01,148 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 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 06:29:01,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:29:01,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 06:29:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:01,349 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:01,349 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 48 [2021-06-05 06:29:01,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:01,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:01,378 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 06:29:01,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:75, output treesize:49 [2021-06-05 06:29:01,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:01,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:01,476 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2021-06-05 06:29:01,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:01,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:01,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:01,493 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-06-05 06:29:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:01,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501998968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:01,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:01,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:29:01,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972628694] [2021-06-05 06:29:01,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:29:01,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:01,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:29:01,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:29:01,530 INFO L87 Difference]: Start difference. First operand 123345 states and 520260 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:03,542 INFO L93 Difference]: Finished difference Result 155614 states and 653344 transitions. [2021-06-05 06:29:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:29:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:04,121 INFO L225 Difference]: With dead ends: 155614 [2021-06-05 06:29:04,121 INFO L226 Difference]: Without dead ends: 155533 [2021-06-05 06:29:04,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:29:04,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155533 states. [2021-06-05 06:29:07,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155533 to 123697. [2021-06-05 06:29:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123697 states, 123696 states have (on average 4.2182123916699) internal successors, (521776), 123696 states have internal predecessors, (521776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:08,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123697 states to 123697 states and 521776 transitions. [2021-06-05 06:29:08,377 INFO L78 Accepts]: Start accepts. Automaton has 123697 states and 521776 transitions. Word has length 39 [2021-06-05 06:29:08,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:08,378 INFO L482 AbstractCegarLoop]: Abstraction has 123697 states and 521776 transitions. [2021-06-05 06:29:08,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 123697 states and 521776 transitions. [2021-06-05 06:29:08,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:08,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:08,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:08,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:08,985 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:08,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:08,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1787565329, now seen corresponding path program 106 times [2021-06-05 06:29:08,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:08,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010287703] [2021-06-05 06:29:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:09,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:09,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010287703] [2021-06-05 06:29:09,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010287703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:09,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807189268] [2021-06-05 06:29:09,109 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 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 06:29:09,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:09,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:09,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:29:09,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:09,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:09,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:09,368 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 68 treesize of output 40 [2021-06-05 06:29:09,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:09,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:09,377 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 06:29:09,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:28 [2021-06-05 06:29:09,405 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:09,405 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 14 [2021-06-05 06:29:09,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:09,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:09,409 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 06:29:09,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:29:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807189268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:09,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:09,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:29:09,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625454325] [2021-06-05 06:29:09,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:09,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:09,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:09,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:09,424 INFO L87 Difference]: Start difference. First operand 123697 states and 521776 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:11,277 INFO L93 Difference]: Finished difference Result 151535 states and 637531 transitions. [2021-06-05 06:29:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:29:11,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:11,808 INFO L225 Difference]: With dead ends: 151535 [2021-06-05 06:29:11,808 INFO L226 Difference]: Without dead ends: 151454 [2021-06-05 06:29:11,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 257.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:29:11,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151454 states. [2021-06-05 06:29:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151454 to 123709. [2021-06-05 06:29:15,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123709 states, 123708 states have (on average 4.2182558929091085) internal successors, (521832), 123708 states have internal predecessors, (521832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123709 states to 123709 states and 521832 transitions. [2021-06-05 06:29:16,028 INFO L78 Accepts]: Start accepts. Automaton has 123709 states and 521832 transitions. Word has length 39 [2021-06-05 06:29:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:16,028 INFO L482 AbstractCegarLoop]: Abstraction has 123709 states and 521832 transitions. [2021-06-05 06:29:16,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 123709 states and 521832 transitions. [2021-06-05 06:29:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:16,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:16,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:16,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2021-06-05 06:29:16,585 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:16,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash -368572305, now seen corresponding path program 107 times [2021-06-05 06:29:16,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:16,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79233385] [2021-06-05 06:29:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:16,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79233385] [2021-06-05 06:29:16,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79233385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:16,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556337069] [2021-06-05 06:29:16,732 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 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 06:29:16,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:29:16,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:16,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:29:16,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:16,998 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:16,998 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 41 treesize of output 29 [2021-06-05 06:29:16,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:17,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:17,004 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 06:29:17,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:30 [2021-06-05 06:29:17,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:17,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:17,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:17,050 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2021-06-05 06:29:17,055 INFO L550 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:17,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:17,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:17,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:19 [2021-06-05 06:29:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:17,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556337069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:17,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:17,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:29:17,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747425408] [2021-06-05 06:29:17,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:29:17,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:17,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:29:17,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:29:17,101 INFO L87 Difference]: Start difference. First operand 123709 states and 521832 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:29:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:19,388 INFO L93 Difference]: Finished difference Result 164806 states and 692755 transitions. [2021-06-05 06:29:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:29:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 06:29:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:19,970 INFO L225 Difference]: With dead ends: 164806 [2021-06-05 06:29:19,971 INFO L226 Difference]: Without dead ends: 164595 [2021-06-05 06:29:19,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:29:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164595 states. [2021-06-05 06:29:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164595 to 124175. [2021-06-05 06:29:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124175 states, 124174 states have (on average 4.217050268172081) internal successors, (523648), 124174 states have internal predecessors, (523648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124175 states to 124175 states and 523648 transitions. [2021-06-05 06:29:24,383 INFO L78 Accepts]: Start accepts. Automaton has 124175 states and 523648 transitions. Word has length 39 [2021-06-05 06:29:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:24,383 INFO L482 AbstractCegarLoop]: Abstraction has 124175 states and 523648 transitions. [2021-06-05 06:29:24,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:29:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 124175 states and 523648 transitions. [2021-06-05 06:29:24,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:24,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:24,653 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:24,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:24,854 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1108442007, now seen corresponding path program 108 times [2021-06-05 06:29:24,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:24,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150344628] [2021-06-05 06:29:24,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:25,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150344628] [2021-06-05 06:29:25,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150344628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:25,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848696995] [2021-06-05 06:29:25,034 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 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 06:29:25,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:29:25,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 06:29:25,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:25,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:25,262 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 45 treesize of output 27 [2021-06-05 06:29:25,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:25,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,271 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 06:29:25,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:32 [2021-06-05 06:29:25,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:25,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,329 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 06:29:25,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:25,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:25,344 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:25,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:27 [2021-06-05 06:29:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:25,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848696995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:25,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:25,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:29:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474144426] [2021-06-05 06:29:25,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:29:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:25,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:29:25,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:29:25,388 INFO L87 Difference]: Start difference. First operand 124175 states and 523648 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 06:29:27,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:27,355 INFO L93 Difference]: Finished difference Result 159336 states and 668490 transitions. [2021-06-05 06:29:27,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 06:29:27,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 39 [2021-06-05 06:29:27,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:28,334 INFO L225 Difference]: With dead ends: 159336 [2021-06-05 06:29:28,335 INFO L226 Difference]: Without dead ends: 158961 [2021-06-05 06:29:28,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 567.9ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:29:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158961 states. [2021-06-05 06:29:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158961 to 124123. [2021-06-05 06:29:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124123 states, 124122 states have (on average 4.217270105219058) internal successors, (523456), 124122 states have internal predecessors, (523456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124123 states to 124123 states and 523456 transitions. [2021-06-05 06:29:31,967 INFO L78 Accepts]: Start accepts. Automaton has 124123 states and 523456 transitions. Word has length 39 [2021-06-05 06:29:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:31,968 INFO L482 AbstractCegarLoop]: Abstraction has 124123 states and 523456 transitions. [2021-06-05 06:29:31,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 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 06:29:31,968 INFO L276 IsEmpty]: Start isEmpty. Operand 124123 states and 523456 transitions. [2021-06-05 06:29:32,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:32,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:32,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:32,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 06:29:32,424 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:32,424 INFO L82 PathProgramCache]: Analyzing trace with hash -965518491, now seen corresponding path program 109 times [2021-06-05 06:29:32,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:32,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086702657] [2021-06-05 06:29:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:32,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086702657] [2021-06-05 06:29:32,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086702657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553932772] [2021-06-05 06:29:32,579 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 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 06:29:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:29:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:32,805 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:32,806 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 57 treesize of output 39 [2021-06-05 06:29:32,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:32,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:32,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:29:32,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:52 [2021-06-05 06:29:32,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:32,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:32,845 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 50 treesize of output 14 [2021-06-05 06:29:32,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:32,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:32,852 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 06:29:32,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:7 [2021-06-05 06:29:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:32,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553932772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:32,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:32,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:29:32,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932053745] [2021-06-05 06:29:32,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:32,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:32,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:32,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:32,876 INFO L87 Difference]: Start difference. First operand 124123 states and 523456 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:34,645 INFO L93 Difference]: Finished difference Result 143876 states and 604029 transitions. [2021-06-05 06:29:34,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 06:29:34,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:35,106 INFO L225 Difference]: With dead ends: 143876 [2021-06-05 06:29:35,107 INFO L226 Difference]: Without dead ends: 143579 [2021-06-05 06:29:35,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:29:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143579 states. [2021-06-05 06:29:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143579 to 124103. [2021-06-05 06:29:38,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124103 states, 124102 states have (on average 4.217385698860615) internal successors, (523386), 124102 states have internal predecessors, (523386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:39,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124103 states to 124103 states and 523386 transitions. [2021-06-05 06:29:39,809 INFO L78 Accepts]: Start accepts. Automaton has 124103 states and 523386 transitions. Word has length 39 [2021-06-05 06:29:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:39,809 INFO L482 AbstractCegarLoop]: Abstraction has 124103 states and 523386 transitions. [2021-06-05 06:29:39,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 124103 states and 523386 transitions. [2021-06-05 06:29:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:40,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:40,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:40,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 06:29:40,457 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash 167297691, now seen corresponding path program 110 times [2021-06-05 06:29:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:40,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947232728] [2021-06-05 06:29:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:40,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:40,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947232728] [2021-06-05 06:29:40,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947232728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:40,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821783435] [2021-06-05 06:29:40,679 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 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 06:29:40,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:29:40,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:29:40,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:40,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:40,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:40,852 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 37 treesize of output 17 [2021-06-05 06:29:40,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:40,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:40,865 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 06:29:40,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:25 [2021-06-05 06:29:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:40,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:40,991 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 40 [2021-06-05 06:29:40,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:41,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:41,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:41,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:22 [2021-06-05 06:29:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:41,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821783435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:41,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:41,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-05 06:29:41,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618987449] [2021-06-05 06:29:41,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:41,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:41,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:41,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:41,080 INFO L87 Difference]: Start difference. First operand 124103 states and 523386 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:43,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:43,566 INFO L93 Difference]: Finished difference Result 175919 states and 736534 transitions. [2021-06-05 06:29:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:29:43,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:29:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:44,317 INFO L225 Difference]: With dead ends: 175919 [2021-06-05 06:29:44,317 INFO L226 Difference]: Without dead ends: 175545 [2021-06-05 06:29:44,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:29:44,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175545 states. [2021-06-05 06:29:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175545 to 126556. [2021-06-05 06:29:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126556 states, 126555 states have (on average 4.211560191221208) internal successors, (532994), 126555 states have internal predecessors, (532994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126556 states to 126556 states and 532994 transitions. [2021-06-05 06:29:48,916 INFO L78 Accepts]: Start accepts. Automaton has 126556 states and 532994 transitions. Word has length 39 [2021-06-05 06:29:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:48,916 INFO L482 AbstractCegarLoop]: Abstraction has 126556 states and 532994 transitions. [2021-06-05 06:29:48,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:48,917 INFO L276 IsEmpty]: Start isEmpty. Operand 126556 states and 532994 transitions. [2021-06-05 06:29:49,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:49,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:49,178 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:49,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-05 06:29:49,378 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2101817165, now seen corresponding path program 111 times [2021-06-05 06:29:49,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:49,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718469592] [2021-06-05 06:29:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:49,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718469592] [2021-06-05 06:29:49,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718469592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082534165] [2021-06-05 06:29:49,544 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 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 06:29:49,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:29:49,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:49,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:29:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:49,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:49,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:49,702 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2021-06-05 06:29:49,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:49,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:49,726 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 06:29:49,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:34 [2021-06-05 06:29:49,851 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-06-05 06:29:49,852 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 44 treesize of output 40 [2021-06-05 06:29:49,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:29:49,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:49,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:29:49,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:22 [2021-06-05 06:29:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:49,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082534165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:49,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:49,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 06:29:49,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456811956] [2021-06-05 06:29:49,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:29:49,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:49,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:29:49,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:29:49,913 INFO L87 Difference]: Start difference. First operand 126556 states and 532994 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 06:29:50,758 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-06-05 06:29:52,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:29:52,617 INFO L93 Difference]: Finished difference Result 179860 states and 754143 transitions. [2021-06-05 06:29:52,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:29:52,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 39 [2021-06-05 06:29:52,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:29:53,318 INFO L225 Difference]: With dead ends: 179860 [2021-06-05 06:29:53,318 INFO L226 Difference]: Without dead ends: 179573 [2021-06-05 06:29:53,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 06:29:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179573 states. [2021-06-05 06:29:56,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179573 to 126552. [2021-06-05 06:29:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126552 states, 126551 states have (on average 4.2115352703653075) internal successors, (532974), 126551 states have internal predecessors, (532974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:29:57,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126552 states to 126552 states and 532974 transitions. [2021-06-05 06:29:57,183 INFO L78 Accepts]: Start accepts. Automaton has 126552 states and 532974 transitions. Word has length 39 [2021-06-05 06:29:57,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:29:57,183 INFO L482 AbstractCegarLoop]: Abstraction has 126552 states and 532974 transitions. [2021-06-05 06:29:57,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 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 06:29:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 126552 states and 532974 transitions. [2021-06-05 06:29:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:29:58,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:29:58,290 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:29:58,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:29:58,491 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:29:58,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:29:58,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1109315317, now seen corresponding path program 112 times [2021-06-05 06:29:58,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:29:58,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938101600] [2021-06-05 06:29:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:29:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:29:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:58,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:29:58,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938101600] [2021-06-05 06:29:58,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938101600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:58,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415808902] [2021-06-05 06:29:58,636 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 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 06:29:58,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:29:58,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:29:58,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:29:58,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:29:58,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:29:58,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:29:58,821 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 58 treesize of output 30 [2021-06-05 06:29:58,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:58,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,829 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 06:29:58,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:68, output treesize:32 [2021-06-05 06:29:58,884 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:29:58,884 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 14 [2021-06-05 06:29:58,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:29:58,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:29:58,888 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 06:29:58,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:29:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:29:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415808902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:29:58,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:29:58,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:29:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636790197] [2021-06-05 06:29:58,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:29:58,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:29:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:29:58,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:29:58,903 INFO L87 Difference]: Start difference. First operand 126552 states and 532974 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:00,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:00,826 INFO L93 Difference]: Finished difference Result 170837 states and 717739 transitions. [2021-06-05 06:30:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:30:00,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:00,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:01,413 INFO L225 Difference]: With dead ends: 170837 [2021-06-05 06:30:01,413 INFO L226 Difference]: Without dead ends: 170750 [2021-06-05 06:30:01,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:30:01,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170750 states. [2021-06-05 06:30:04,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170750 to 127454. [2021-06-05 06:30:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127454 states, 127453 states have (on average 4.21303539343915) internal successors, (536964), 127453 states have internal predecessors, (536964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:06,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127454 states to 127454 states and 536964 transitions. [2021-06-05 06:30:06,124 INFO L78 Accepts]: Start accepts. Automaton has 127454 states and 536964 transitions. Word has length 39 [2021-06-05 06:30:06,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:06,124 INFO L482 AbstractCegarLoop]: Abstraction has 127454 states and 536964 transitions. [2021-06-05 06:30:06,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:06,124 INFO L276 IsEmpty]: Start isEmpty. Operand 127454 states and 536964 transitions. [2021-06-05 06:30:06,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:06,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:06,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:06,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 06:30:06,665 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash 471727287, now seen corresponding path program 113 times [2021-06-05 06:30:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:06,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782278793] [2021-06-05 06:30:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:06,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:06,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:06,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782278793] [2021-06-05 06:30:06,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782278793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:06,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52031478] [2021-06-05 06:30:06,850 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 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 06:30:06,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:30:06,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:30:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:07,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:07,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:07,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:07,163 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 60 [2021-06-05 06:30:07,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:07,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:07,198 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 06:30:07,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:34 [2021-06-05 06:30:07,268 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:07,269 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 21 treesize of output 9 [2021-06-05 06:30:07,270 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:07,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:07,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:07,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:5 [2021-06-05 06:30:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:07,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52031478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:07,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:07,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:30:07,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556349705] [2021-06-05 06:30:07,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:30:07,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:30:07,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:30:07,288 INFO L87 Difference]: Start difference. First operand 127454 states and 536964 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:08,468 WARN L205 SmtUtils]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 06:30:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:09,681 INFO L93 Difference]: Finished difference Result 174707 states and 731440 transitions. [2021-06-05 06:30:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:30:09,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:10,822 INFO L225 Difference]: With dead ends: 174707 [2021-06-05 06:30:10,822 INFO L226 Difference]: Without dead ends: 174062 [2021-06-05 06:30:10,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1207.9ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:30:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174062 states. [2021-06-05 06:30:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174062 to 135181. [2021-06-05 06:30:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135181 states, 135180 states have (on average 4.205866252404202) internal successors, (568549), 135180 states have internal predecessors, (568549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135181 states to 135181 states and 568549 transitions. [2021-06-05 06:30:15,829 INFO L78 Accepts]: Start accepts. Automaton has 135181 states and 568549 transitions. Word has length 39 [2021-06-05 06:30:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:15,829 INFO L482 AbstractCegarLoop]: Abstraction has 135181 states and 568549 transitions. [2021-06-05 06:30:15,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 135181 states and 568549 transitions. [2021-06-05 06:30:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:16,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:16,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:16,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:16,497 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:16,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1890720311, now seen corresponding path program 114 times [2021-06-05 06:30:16,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:16,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728009878] [2021-06-05 06:30:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728009878] [2021-06-05 06:30:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728009878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56835270] [2021-06-05 06:30:16,696 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 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 06:30:16,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:30:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:16,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:30:16,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:17,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:17,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 44 [2021-06-05 06:30:17,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:17,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:17,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-06-05 06:30:17,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:83, output treesize:45 [2021-06-05 06:30:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:17,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:17,318 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 30 [2021-06-05 06:30:17,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:30:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-06-05 06:30:17,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:17,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:17,358 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:17,359 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:74, output treesize:37 [2021-06-05 06:30:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:17,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56835270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:17,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:17,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 06:30:17,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415735095] [2021-06-05 06:30:17,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:30:17,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:17,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:30:17,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:30:17,436 INFO L87 Difference]: Start difference. First operand 135181 states and 568549 transitions. Second operand has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:30:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:21,414 INFO L93 Difference]: Finished difference Result 225201 states and 946366 transitions. [2021-06-05 06:30:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:30:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 39 [2021-06-05 06:30:21,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:22,288 INFO L225 Difference]: With dead ends: 225201 [2021-06-05 06:30:22,288 INFO L226 Difference]: Without dead ends: 224682 [2021-06-05 06:30:22,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1806.5ms TimeCoverageRelationStatistics Valid=249, Invalid=1557, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:30:22,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224682 states. [2021-06-05 06:30:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224682 to 137450. [2021-06-05 06:30:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137450 states, 137449 states have (on average 4.207429664821134) internal successors, (578307), 137449 states have internal predecessors, (578307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:27,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137450 states to 137450 states and 578307 transitions. [2021-06-05 06:30:27,564 INFO L78 Accepts]: Start accepts. Automaton has 137450 states and 578307 transitions. Word has length 39 [2021-06-05 06:30:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:27,564 INFO L482 AbstractCegarLoop]: Abstraction has 137450 states and 578307 transitions. [2021-06-05 06:30:27,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.55) internal successors, (71), 19 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 06:30:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 137450 states and 578307 transitions. [2021-06-05 06:30:28,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:28,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:28,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:28,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 06:30:28,917 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1523277007, now seen corresponding path program 115 times [2021-06-05 06:30:28,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:28,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217178996] [2021-06-05 06:30:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:29,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:29,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217178996] [2021-06-05 06:30:29,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217178996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:29,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85552812] [2021-06-05 06:30:29,107 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 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 06:30:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:29,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:30:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:29,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:29,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:29,342 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 68 treesize of output 40 [2021-06-05 06:30:29,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:29,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:29,351 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 06:30:29,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:28 [2021-06-05 06:30:29,377 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:30:29,377 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 14 [2021-06-05 06:30:29,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:29,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:29,381 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 06:30:29,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:7 [2021-06-05 06:30:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:29,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85552812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:29,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:29,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 06:30:29,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344424380] [2021-06-05 06:30:29,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:30:29,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:29,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:30:29,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:30:29,403 INFO L87 Difference]: Start difference. First operand 137450 states and 578307 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 06:30:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:31,462 INFO L93 Difference]: Finished difference Result 181373 states and 758213 transitions. [2021-06-05 06:30:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 06:30:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 39 [2021-06-05 06:30:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:32,845 INFO L225 Difference]: With dead ends: 181373 [2021-06-05 06:30:32,845 INFO L226 Difference]: Without dead ends: 180934 [2021-06-05 06:30:32,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:30:33,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180934 states. [2021-06-05 06:30:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180934 to 137386. [2021-06-05 06:30:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137386 states, 137385 states have (on average 4.208559886450486) internal successors, (578193), 137385 states have internal predecessors, (578193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137386 states to 137386 states and 578193 transitions. [2021-06-05 06:30:38,083 INFO L78 Accepts]: Start accepts. Automaton has 137386 states and 578193 transitions. Word has length 39 [2021-06-05 06:30:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:30:38,083 INFO L482 AbstractCegarLoop]: Abstraction has 137386 states and 578193 transitions. [2021-06-05 06:30:38,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 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 06:30:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 137386 states and 578193 transitions. [2021-06-05 06:30:38,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 06:30:38,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:30:38,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:30:38,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable472 [2021-06-05 06:30:38,809 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:30:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:30:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1880320479, now seen corresponding path program 116 times [2021-06-05 06:30:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:30:38,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137834031] [2021-06-05 06:30:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:30:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:30:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:39,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:30:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137834031] [2021-06-05 06:30:39,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137834031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:39,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140800272] [2021-06-05 06:30:39,023 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 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 06:30:39,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:30:39,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:30:39,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 06:30:39,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:30:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:39,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:30:39,190 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 58 treesize of output 30 [2021-06-05 06:30:39,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:30:39,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:39,201 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 06:30:39,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:37 [2021-06-05 06:30:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:30:39,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:39,279 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2021-06-05 06:30:39,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:30:39,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:30:39,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:30:39,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:27 [2021-06-05 06:30:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:30:39,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140800272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:30:39,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:30:39,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 06:30:39,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386768908] [2021-06-05 06:30:39,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:30:39,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:30:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:30:39,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:30:39,331 INFO L87 Difference]: Start difference. First operand 137386 states and 578193 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:30:41,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:30:41,842 INFO L93 Difference]: Finished difference Result 199856 states and 838102 transitions. [2021-06-05 06:30:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 06:30:41,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 06:30:41,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:30:42,579 INFO L225 Difference]: With dead ends: 199856 [2021-06-05 06:30:42,579 INFO L226 Difference]: Without dead ends: 199769 [2021-06-05 06:30:42,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:30:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199769 states. Received shutdown request... [2021-06-05 06:30:45,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:30:45,805 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:30:45,806 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:30:45,809 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:30:45,809 INFO L202 PluginConnector]: Adding new model buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:30:45 BasicIcfg [2021-06-05 06:30:45,809 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:30:45,809 INFO L168 Benchmark]: Toolchain (without parser) took 646003.46 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 365.6 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.6 GB. Max. memory is 16.0 GB. [2021-06-05 06:30:45,809 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 385.9 MB. Free memory was 366.9 MB in the beginning and 366.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:30:45,809 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.01 ms. Allocated memory is still 385.9 MB. Free memory was 365.6 MB in the beginning and 364.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:30:45,809 INFO L168 Benchmark]: Boogie Preprocessor took 20.81 ms. Allocated memory is still 385.9 MB. Free memory was 364.1 MB in the beginning and 363.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 06:30:45,810 INFO L168 Benchmark]: RCFGBuilder took 289.93 ms. Allocated memory is still 385.9 MB. Free memory was 363.0 MB in the beginning and 347.9 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:30:45,810 INFO L168 Benchmark]: TraceAbstraction took 645663.20 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 347.4 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-06-05 06:30:45,810 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 0.16 ms. Allocated memory is still 385.9 MB. Free memory was 366.9 MB in the beginning and 366.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.01 ms. Allocated memory is still 385.9 MB. Free memory was 365.6 MB in the beginning and 364.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.81 ms. Allocated memory is still 385.9 MB. Free memory was 364.1 MB in the beginning and 363.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 289.93 ms. Allocated memory is still 385.9 MB. Free memory was 363.0 MB in the beginning and 347.9 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 645663.20 ms. Allocated memory was 385.9 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 347.4 MB in the beginning and 12.5 GB in the end (delta: -12.2 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 54 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 645552.2ms, OverallIterations: 125, TraceHistogramMax: 2, EmptinessCheckTime: 28070.6ms, AutomataDifference: 233141.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 68.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13132 SDtfs, 30013 SDslu, 113597 SDs, 0 SdLazy, 67247 SolverSat, 3457 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40111.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6255 GetRequests, 3499 SyntacticMatches, 356 SemanticMatches, 2400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11458 ImplicationChecksByTransitivity, 63113.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=137450occurred in iteration=123, InterpolantAutomatonStates: 2083, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 293374.4ms AutomataMinimizationTime, 125 MinimizatonAttempts, 4147631 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 606.7ms SsaConstructionTime, 2970.9ms SatisfiabilityAnalysisTime, 58713.4ms InterpolantComputationTime, 9097 NumberOfCodeBlocks, 9093 NumberOfCodeBlocksAsserted, 429 NumberOfCheckSat, 8853 ConstructedInterpolants, 808 QuantifiedInterpolants, 199565 SizeOfPredicates, 687 NumberOfNonLiveVariables, 13496 ConjunctsInSsa, 3580 ConjunctsInUnsatCore, 244 InterpolantComputations, 8 PerfectInterpolantSequences, 252/3864 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