/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:15:19,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:15:19,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:15:19,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:15:19,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:15:19,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:15:19,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:15:19,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:15:19,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:15:19,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:15:19,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:15:19,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:15:19,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:15:19,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:15:19,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:15:19,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:15:19,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:15:19,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:15:19,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:15:19,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:15:19,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:15:19,625 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:15:19,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:15:19,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:15:19,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:15:19,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:15:19,673 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:15:19,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:15:19,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:15:19,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:15:19,675 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:15:19,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:15:19,676 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:15:19,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:15:19,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:15:19,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:15:19,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:15:19,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:15:19,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:15:19,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:15:19,677 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:15:19,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:15:19,678 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:15:19,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:15:19,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:15:19,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:15:19,679 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:15:19,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:15:19,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:19,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:15:19,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:15:19,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:15:19,680 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:15:19,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:15:19,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:15:19,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:15:19,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:15:19,957 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:15:19,961 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:15:19,963 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:15:19,963 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:15:19,964 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2019-11-23 20:15:20,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e71b1e13/64773e30da194ad09732055292f8b956/FLAG9f1c95393 [2019-11-23 20:15:20,525 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:15:20,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const3.c [2019-11-23 20:15:20,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e71b1e13/64773e30da194ad09732055292f8b956/FLAG9f1c95393 [2019-11-23 20:15:20,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e71b1e13/64773e30da194ad09732055292f8b956 [2019-11-23 20:15:20,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:15:20,891 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:15:20,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:20,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:15:20,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:15:20,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:20" (1/1) ... [2019-11-23 20:15:20,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447643de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:20, skipping insertion in model container [2019-11-23 20:15:20,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:20" (1/1) ... [2019-11-23 20:15:20,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:15:20,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:15:21,123 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:21,135 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:15:21,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:21,247 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:15:21,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21 WrapperNode [2019-11-23 20:15:21,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:21,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:21,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:15:21,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:15:21,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:21,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:15:21,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:15:21,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:15:21,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,318 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (1/1) ... [2019-11-23 20:15:21,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:15:21,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:15:21,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:15:21,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:15:21,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (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 [2019-11-23 20:15:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:15:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:15:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:15:21,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:15:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:15:21,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:15:21,716 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 20:15:21,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:21 BoogieIcfgContainer [2019-11-23 20:15:21,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:15:21,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:15:21,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:15:21,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:15:21,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:15:20" (1/3) ... [2019-11-23 20:15:21,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6befc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:21, skipping insertion in model container [2019-11-23 20:15:21,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:21" (2/3) ... [2019-11-23 20:15:21,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f6befc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:21, skipping insertion in model container [2019-11-23 20:15:21,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:21" (3/3) ... [2019-11-23 20:15:21,726 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const3.c [2019-11-23 20:15:21,736 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:15:21,744 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:15:21,756 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:15:21,780 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:15:21,780 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:15:21,780 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:15:21,780 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:15:21,780 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:15:21,781 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:15:21,781 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:15:21,781 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:15:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-23 20:15:21,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:15:21,800 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:21,801 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:21,801 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:21,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2019-11-23 20:15:21,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:21,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741993847] [2019-11-23 20:15:21,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:21,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741993847] [2019-11-23 20:15:21,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:21,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:15:21,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730120639] [2019-11-23 20:15:21,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:15:21,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:21,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:15:21,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:21,957 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-11-23 20:15:21,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:21,979 INFO L93 Difference]: Finished difference Result 57 states and 84 transitions. [2019-11-23 20:15:21,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:15:21,981 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-11-23 20:15:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:21,991 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:15:21,991 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:15:21,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:15:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 20:15:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:15:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2019-11-23 20:15:22,033 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2019-11-23 20:15:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:22,033 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2019-11-23 20:15:22,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:15:22,034 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2019-11-23 20:15:22,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:15:22,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:22,035 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:22,035 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:22,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:22,036 INFO L82 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2019-11-23 20:15:22,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:22,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647780826] [2019-11-23 20:15:22,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:22,125 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647780826] [2019-11-23 20:15:22,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:22,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:22,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910656284] [2019-11-23 20:15:22,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:22,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:22,132 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 4 states. [2019-11-23 20:15:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:22,231 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2019-11-23 20:15:22,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:22,232 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:15:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:22,234 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:15:22,234 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:15:22,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:15:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:15:22,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:15:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:15:22,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2019-11-23 20:15:22,252 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 19 [2019-11-23 20:15:22,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:22,253 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2019-11-23 20:15:22,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2019-11-23 20:15:22,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:15:22,254 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:22,255 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:22,255 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:22,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:22,256 INFO L82 PathProgramCache]: Analyzing trace with hash -145263842, now seen corresponding path program 1 times [2019-11-23 20:15:22,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:22,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989676888] [2019-11-23 20:15:22,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:15:22,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989676888] [2019-11-23 20:15:22,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:22,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:15:22,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780532418] [2019-11-23 20:15:22,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:15:22,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:15:22,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:22,318 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 3 states. [2019-11-23 20:15:22,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:22,404 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2019-11-23 20:15:22,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:15:22,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-23 20:15:22,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:22,405 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:15:22,406 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:15:22,407 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:22,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:15:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:15:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:15:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-11-23 20:15:22,414 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2019-11-23 20:15:22,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:22,414 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-11-23 20:15:22,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:15:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-11-23 20:15:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:15:22,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:22,415 INFO L410 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] [2019-11-23 20:15:22,416 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:22,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:22,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1250455616, now seen corresponding path program 1 times [2019-11-23 20:15:22,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:22,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95021546] [2019-11-23 20:15:22,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:15:22,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95021546] [2019-11-23 20:15:22,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:22,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:22,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037911512] [2019-11-23 20:15:22,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:22,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:22,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:22,495 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2019-11-23 20:15:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:22,622 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-11-23 20:15:22,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:22,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-23 20:15:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:22,624 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:15:22,624 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:15:22,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:15:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2019-11-23 20:15:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:15:22,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-23 20:15:22,632 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2019-11-23 20:15:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:22,632 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-23 20:15:22,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-23 20:15:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:15:22,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:22,634 INFO L410 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, 1, 1, 1, 1] [2019-11-23 20:15:22,634 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:22,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:22,635 INFO L82 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2019-11-23 20:15:22,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:22,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389819631] [2019-11-23 20:15:22,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:15:22,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389819631] [2019-11-23 20:15:22,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614317614] [2019-11-23 20:15:22,732 INFO L94 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 [2019-11-23 20:15:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:22,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:22,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:15:22,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:22,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:15:22,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988527815] [2019-11-23 20:15:22,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:15:22,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:15:22,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:22,876 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2019-11-23 20:15:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:22,996 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2019-11-23 20:15:22,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:15:22,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-11-23 20:15:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:22,997 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:15:22,997 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:15:22,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:22,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:15:23,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 20:15:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:15:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-23 20:15:23,012 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2019-11-23 20:15:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:23,012 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-23 20:15:23,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:15:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-23 20:15:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:15:23,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:23,014 INFO L410 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, 1, 1, 1, 1] [2019-11-23 20:15:23,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:23,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:23,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:23,218 INFO L82 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2019-11-23 20:15:23,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:23,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934637503] [2019-11-23 20:15:23,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:15:23,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934637503] [2019-11-23 20:15:23,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282490502] [2019-11-23 20:15:23,332 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:23,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:23,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:23,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:23,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:15:23,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:23,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:15:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889425701] [2019-11-23 20:15:23,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:15:23,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:15:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:15:23,416 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 7 states. [2019-11-23 20:15:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:23,574 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2019-11-23 20:15:23,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:15:23,574 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-23 20:15:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:23,575 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:15:23,575 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:15:23,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:15:23,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:15:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-11-23 20:15:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:15:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2019-11-23 20:15:23,583 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2019-11-23 20:15:23,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:23,583 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2019-11-23 20:15:23,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:15:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2019-11-23 20:15:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:15:23,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:23,585 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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] [2019-11-23 20:15:23,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:23,793 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2019-11-23 20:15:23,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:23,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023625603] [2019-11-23 20:15:23,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:25,004 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023625603] [2019-11-23 20:15:25,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365775069] [2019-11-23 20:15:25,005 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:15:25,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:15:25,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:25,059 WARN L253 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 20:15:25,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:26,212 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:26,213 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 18 [2019-11-23 20:15:26,214 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:15:26,230 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:26,231 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:26,236 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:26,236 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:32 [2019-11-23 20:15:26,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:26,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:26,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:26,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:26,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2019-11-23 20:15:26,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873091752] [2019-11-23 20:15:26,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:15:26,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:26,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:15:26,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:15:26,459 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 36 states. [2019-11-23 20:15:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:28,840 INFO L93 Difference]: Finished difference Result 131 states and 149 transitions. [2019-11-23 20:15:28,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:15:28,840 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 47 [2019-11-23 20:15:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:28,843 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:15:28,843 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:15:28,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 25 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:15:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:15:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2019-11-23 20:15:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:15:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2019-11-23 20:15:28,857 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2019-11-23 20:15:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:28,857 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2019-11-23 20:15:28,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:15:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2019-11-23 20:15:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:15:28,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:28,859 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2019-11-23 20:15:29,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:29,064 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:29,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2019-11-23 20:15:29,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:29,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178362331] [2019-11-23 20:15:29,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:15:29,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178362331] [2019-11-23 20:15:29,144 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428056229] [2019-11-23 20:15:29,144 INFO L92 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 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 [2019-11-23 20:15:29,187 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:29,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:29,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:29,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:15:29,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:29,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:29,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064216586] [2019-11-23 20:15:29,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:29,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:29,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:29,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:29,239 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand 13 states. [2019-11-23 20:15:29,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:29,543 INFO L93 Difference]: Finished difference Result 177 states and 202 transitions. [2019-11-23 20:15:29,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:15:29,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-11-23 20:15:29,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:29,545 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:15:29,545 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:15:29,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:29,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:15:29,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2019-11-23 20:15:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:15:29,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-11-23 20:15:29,557 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2019-11-23 20:15:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:29,557 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-11-23 20:15:29,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-11-23 20:15:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:15:29,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:29,559 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-23 20:15:29,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:29,762 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:29,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2019-11-23 20:15:29,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:29,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827168347] [2019-11-23 20:15:29,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:15:29,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827168347] [2019-11-23 20:15:29,872 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588312729] [2019-11-23 20:15:29,872 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:29,942 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:15:29,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:29,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:29,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:15:29,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:29,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:30,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539955372] [2019-11-23 20:15:30,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:30,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:30,001 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand 13 states. [2019-11-23 20:15:30,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:30,325 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2019-11-23 20:15:30,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:15:30,326 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2019-11-23 20:15:30,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:30,327 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:15:30,327 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:15:30,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:15:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2019-11-23 20:15:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:15:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2019-11-23 20:15:30,335 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2019-11-23 20:15:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:30,335 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2019-11-23 20:15:30,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2019-11-23 20:15:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:15:30,336 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:30,337 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:30,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:30,541 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2019-11-23 20:15:30,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:30,542 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169260607] [2019-11-23 20:15:30,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:32,030 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2019-11-23 20:15:32,866 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2019-11-23 20:15:33,587 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2019-11-23 20:15:33,819 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-11-23 20:15:33,997 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2019-11-23 20:15:34,186 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2019-11-23 20:15:34,347 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-11-23 20:15:34,639 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2019-11-23 20:15:34,809 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2019-11-23 20:15:35,038 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-23 20:15:35,241 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2019-11-23 20:15:35,430 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2019-11-23 20:15:35,627 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2019-11-23 20:15:36,247 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-23 20:15:36,472 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-11-23 20:15:36,665 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-11-23 20:15:36,888 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2019-11-23 20:15:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:37,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169260607] [2019-11-23 20:15:37,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376110571] [2019-11-23 20:15:37,746 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 20:15:37,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:15:37,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:37,800 WARN L253 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 98 conjunts are in the unsatisfiable core [2019-11-23 20:15:37,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:37,817 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:15:37,817 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:37,825 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:37,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:37,825 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:15:37,850 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 30 treesize of output 25 [2019-11-23 20:15:37,852 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:37,855 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:37,858 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:37,860 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2019-11-23 20:15:37,860 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:37,865 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:37,865 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:37,877 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:37,878 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:37,878 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:42, output treesize:31 [2019-11-23 20:15:37,941 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:37,942 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:37,944 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:37,945 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:37,945 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2019-11-23 20:15:37,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:37,961 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:37,963 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:37,963 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:46 [2019-11-23 20:15:40,799 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:40,800 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:40,801 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:40,804 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:40,807 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:40,834 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:40,835 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 88 [2019-11-23 20:15:40,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,837 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,840 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:40,842 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2019-11-23 20:15:40,919 INFO L567 ElimStorePlain]: treesize reduction 116, result has 25.2 percent of original size [2019-11-23 20:15:40,920 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:40,920 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:79, output treesize:39 [2019-11-23 20:15:41,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:41,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:41,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:41,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:41,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 42] total 84 [2019-11-23 20:15:41,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627097045] [2019-11-23 20:15:41,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-11-23 20:15:41,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-11-23 20:15:41,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=5956, Unknown=0, NotChecked=0, Total=6972 [2019-11-23 20:15:41,224 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 84 states. [2019-11-23 20:15:42,392 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 52 [2019-11-23 20:15:42,697 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 64 [2019-11-23 20:15:44,093 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 45 [2019-11-23 20:15:44,982 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 34 [2019-11-23 20:15:45,558 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2019-11-23 20:15:47,316 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 54 [2019-11-23 20:15:47,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:47,344 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2019-11-23 20:15:47,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:15:47,344 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 61 [2019-11-23 20:15:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:47,346 INFO L225 Difference]: With dead ends: 172 [2019-11-23 20:15:47,346 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:15:47,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 15 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5758 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1495, Invalid=10061, Unknown=0, NotChecked=0, Total=11556 [2019-11-23 20:15:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:15:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2019-11-23 20:15:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 20:15:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2019-11-23 20:15:47,363 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 61 [2019-11-23 20:15:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:47,363 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2019-11-23 20:15:47,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-11-23 20:15:47,363 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2019-11-23 20:15:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:15:47,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:47,365 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:47,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:47,569 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:47,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1381679542, now seen corresponding path program 7 times [2019-11-23 20:15:47,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:47,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274443174] [2019-11-23 20:15:47,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-23 20:15:47,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274443174] [2019-11-23 20:15:47,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027409377] [2019-11-23 20:15:47,667 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 20:15:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:47,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:15:47,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:15:47,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:47,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-11-23 20:15:47,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231773744] [2019-11-23 20:15:47,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:15:47,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:15:47,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:15:47,814 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 17 states. [2019-11-23 20:15:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:48,194 INFO L93 Difference]: Finished difference Result 215 states and 237 transitions. [2019-11-23 20:15:48,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:15:48,195 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2019-11-23 20:15:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:48,196 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:15:48,196 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 20:15:48,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:15:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 20:15:48,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2019-11-23 20:15:48,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:15:48,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2019-11-23 20:15:48,209 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 65 [2019-11-23 20:15:48,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:48,209 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2019-11-23 20:15:48,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:15:48,209 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2019-11-23 20:15:48,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:15:48,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:48,211 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:48,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:48,415 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:48,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:48,415 INFO L82 PathProgramCache]: Analyzing trace with hash 156775434, now seen corresponding path program 8 times [2019-11-23 20:15:48,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:48,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015178280] [2019-11-23 20:15:48,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:15:48,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015178280] [2019-11-23 20:15:48,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516820123] [2019-11-23 20:15:48,516 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-23 20:15:48,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:48,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:48,591 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:15:48,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:15:48,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:48,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:15:48,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848670809] [2019-11-23 20:15:48,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:15:48,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:48,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:15:48,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:48,666 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand 16 states. [2019-11-23 20:15:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:49,159 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2019-11-23 20:15:49,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:15:49,160 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:15:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:49,161 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:15:49,161 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:15:49,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:15:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:15:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2019-11-23 20:15:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:15:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2019-11-23 20:15:49,173 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2019-11-23 20:15:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:49,173 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2019-11-23 20:15:49,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:15:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2019-11-23 20:15:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:15:49,177 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:49,177 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:49,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:49,383 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:49,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:49,384 INFO L82 PathProgramCache]: Analyzing trace with hash 958143540, now seen corresponding path program 9 times [2019-11-23 20:15:49,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:49,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587757079] [2019-11-23 20:15:49,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:50,489 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2019-11-23 20:15:51,116 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2019-11-23 20:15:51,262 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2019-11-23 20:15:51,902 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2019-11-23 20:15:52,062 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2019-11-23 20:15:52,221 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2019-11-23 20:15:52,398 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2019-11-23 20:15:52,595 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-11-23 20:15:52,803 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2019-11-23 20:15:53,557 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-11-23 20:15:53,784 WARN L192 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2019-11-23 20:15:54,013 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2019-11-23 20:15:54,247 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2019-11-23 20:15:54,466 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2019-11-23 20:15:54,714 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2019-11-23 20:15:54,918 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2019-11-23 20:15:55,218 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2019-11-23 20:15:55,412 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:15:55,609 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-23 20:15:55,808 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2019-11-23 20:15:56,006 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2019-11-23 20:15:56,208 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2019-11-23 20:15:56,401 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2019-11-23 20:15:56,739 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2019-11-23 20:15:56,927 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2019-11-23 20:15:57,133 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-11-23 20:15:57,335 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-11-23 20:15:57,539 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-11-23 20:15:57,746 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2019-11-23 20:15:57,928 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-11-23 20:15:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 1 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:59,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587757079] [2019-11-23 20:15:59,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146289343] [2019-11-23 20:15:59,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 20:15:59,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:15:59,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:59,366 WARN L253 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 120 conjunts are in the unsatisfiable core [2019-11-23 20:15:59,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:59,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:15:59,428 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:59,440 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:59,440 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:59,441 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:16:03,436 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:03,437 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:03,439 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:03,440 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:03,464 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:03,464 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 69 [2019-11-23 20:16:03,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,470 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,470 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:16:03,530 INFO L567 ElimStorePlain]: treesize reduction 56, result has 39.1 percent of original size [2019-11-23 20:16:03,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,532 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:16:03,533 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:20 [2019-11-23 20:16:03,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:03,853 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:16:03,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:03,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 27] total 90 [2019-11-23 20:16:03,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853968512] [2019-11-23 20:16:03,854 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-11-23 20:16:03,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:03,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-11-23 20:16:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1031, Invalid=6979, Unknown=0, NotChecked=0, Total=8010 [2019-11-23 20:16:03,857 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 90 states. [2019-11-23 20:16:05,721 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2019-11-23 20:16:05,985 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2019-11-23 20:16:09,496 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2019-11-23 20:16:09,767 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2019-11-23 20:16:13,178 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2019-11-23 20:16:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:13,195 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2019-11-23 20:16:13,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:16:13,196 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 75 [2019-11-23 20:16:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:13,197 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:16:13,198 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:16:13,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 36 SyntacticMatches, 22 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1944, Invalid=13062, Unknown=0, NotChecked=0, Total=15006 [2019-11-23 20:16:13,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:16:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2019-11-23 20:16:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-23 20:16:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2019-11-23 20:16:13,214 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 75 [2019-11-23 20:16:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:13,215 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2019-11-23 20:16:13,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-11-23 20:16:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2019-11-23 20:16:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:16:13,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:13,216 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:13,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:13,420 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1706175702, now seen corresponding path program 10 times [2019-11-23 20:16:13,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:13,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812501840] [2019-11-23 20:16:13,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:16:13,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812501840] [2019-11-23 20:16:13,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637771157] [2019-11-23 20:16:13,542 INFO L92 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 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 [2019-11-23 20:16:13,593 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:16:13,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:13,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:13,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-23 20:16:13,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:13,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:16:13,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71171199] [2019-11-23 20:16:13,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:16:13,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:16:13,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:16:13,695 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand 19 states. [2019-11-23 20:16:14,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:14,186 INFO L93 Difference]: Finished difference Result 265 states and 290 transitions. [2019-11-23 20:16:14,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:16:14,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2019-11-23 20:16:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:14,187 INFO L225 Difference]: With dead ends: 265 [2019-11-23 20:16:14,188 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:16:14,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:16:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:16:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 128. [2019-11-23 20:16:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-23 20:16:14,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2019-11-23 20:16:14,199 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 77 [2019-11-23 20:16:14,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:14,199 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2019-11-23 20:16:14,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:16:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2019-11-23 20:16:14,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:16:14,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:14,200 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:14,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:14,404 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash 587280952, now seen corresponding path program 11 times [2019-11-23 20:16:14,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:14,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103313746] [2019-11-23 20:16:14,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-23 20:16:14,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103313746] [2019-11-23 20:16:14,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824444445] [2019-11-23 20:16:14,544 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2019-11-23 20:16:14,742 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:16:14,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:14,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:16:14,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-23 20:16:14,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:14,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:16:14,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397117719] [2019-11-23 20:16:14,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:16:14,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:16:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:16:14,815 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand 19 states. [2019-11-23 20:16:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:15,368 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2019-11-23 20:16:15,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:16:15,368 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2019-11-23 20:16:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:15,369 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:16:15,369 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:16:15,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:16:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:16:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2019-11-23 20:16:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:16:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2019-11-23 20:16:15,378 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2019-11-23 20:16:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:15,378 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2019-11-23 20:16:15,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:16:15,378 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2019-11-23 20:16:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:16:15,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:15,379 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:15,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:15,580 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1296238366, now seen corresponding path program 12 times [2019-11-23 20:16:15,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:15,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269500600] [2019-11-23 20:16:15,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:16,501 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2019-11-23 20:16:16,666 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2019-11-23 20:16:16,824 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2019-11-23 20:16:17,096 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2019-11-23 20:16:17,303 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2019-11-23 20:16:17,501 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2019-11-23 20:16:17,701 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:16:17,953 WARN L192 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2019-11-23 20:16:18,176 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-23 20:16:18,365 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2019-11-23 20:16:18,582 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 20:16:18,794 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 20:16:19,028 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2019-11-23 20:16:19,211 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2019-11-23 20:16:19,376 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2019-11-23 20:16:19,579 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-23 20:16:19,864 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2019-11-23 20:16:20,159 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2019-11-23 20:16:20,443 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2019-11-23 20:16:20,746 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 49 [2019-11-23 20:16:20,991 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2019-11-23 20:16:21,265 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2019-11-23 20:16:21,542 WARN L192 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2019-11-23 20:16:21,891 WARN L192 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 56 [2019-11-23 20:16:22,132 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2019-11-23 20:16:22,369 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 43 [2019-11-23 20:16:22,574 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2019-11-23 20:16:22,879 WARN L192 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2019-11-23 20:16:23,199 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2019-11-23 20:16:23,497 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2019-11-23 20:16:23,810 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2019-11-23 20:16:24,106 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2019-11-23 20:16:24,370 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2019-11-23 20:16:24,636 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2019-11-23 20:16:24,944 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-11-23 20:16:25,212 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2019-11-23 20:16:25,638 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2019-11-23 20:16:25,928 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2019-11-23 20:16:26,231 WARN L192 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2019-11-23 20:16:26,560 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2019-11-23 20:16:26,833 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2019-11-23 20:16:27,120 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2019-11-23 20:16:27,391 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2019-11-23 20:16:27,682 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2019-11-23 20:16:27,981 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-11-23 20:16:28,319 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2019-11-23 20:16:28,561 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2019-11-23 20:16:28,787 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 48 [2019-11-23 20:16:29,045 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2019-11-23 20:16:29,268 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2019-11-23 20:16:29,483 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2019-11-23 20:16:29,704 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-11-23 20:16:29,937 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-11-23 20:16:30,153 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2019-11-23 20:16:30,481 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2019-11-23 20:16:30,635 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2019-11-23 20:16:30,845 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2019-11-23 20:16:31,064 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-11-23 20:16:31,248 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2019-11-23 20:16:31,455 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2019-11-23 20:16:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 1 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:32,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269500600] [2019-11-23 20:16:32,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480283278] [2019-11-23 20:16:32,166 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 20:16:32,240 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:16:32,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:32,245 WARN L253 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 142 conjunts are in the unsatisfiable core [2019-11-23 20:16:32,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:32,303 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:16:32,304 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:32,311 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:32,311 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:32,311 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:16:36,485 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:36,503 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:36,504 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 36 [2019-11-23 20:16:36,504 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:36,548 INFO L567 ElimStorePlain]: treesize reduction 14, result has 72.0 percent of original size [2019-11-23 20:16:36,548 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,549 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:36,550 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:20 [2019-11-23 20:16:36,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:36,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:16:37,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:37,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 31] total 106 [2019-11-23 20:16:37,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386818412] [2019-11-23 20:16:37,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-11-23 20:16:37,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-11-23 20:16:37,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1223, Invalid=9907, Unknown=0, NotChecked=0, Total=11130 [2019-11-23 20:16:37,036 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 106 states. [2019-11-23 20:16:39,713 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2019-11-23 20:16:40,046 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2019-11-23 20:16:41,693 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2019-11-23 20:16:42,077 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 73 [2019-11-23 20:16:42,426 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 75 [2019-11-23 20:16:42,769 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 84 [2019-11-23 20:16:43,088 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 77 [2019-11-23 20:16:43,455 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2019-11-23 20:16:44,148 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-23 20:16:44,686 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2019-11-23 20:16:45,116 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2019-11-23 20:16:45,901 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2019-11-23 20:16:46,472 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2019-11-23 20:16:46,760 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2019-11-23 20:16:47,209 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 62 [2019-11-23 20:16:47,672 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2019-11-23 20:16:52,219 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2019-11-23 20:16:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:52,256 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2019-11-23 20:16:52,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:16:52,256 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 89 [2019-11-23 20:16:52,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:52,258 INFO L225 Difference]: With dead ends: 180 [2019-11-23 20:16:52,258 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:16:52,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 41 SyntacticMatches, 28 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11784 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=2469, Invalid=19583, Unknown=0, NotChecked=0, Total=22052 [2019-11-23 20:16:52,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:16:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2019-11-23 20:16:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 20:16:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2019-11-23 20:16:52,276 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 89 [2019-11-23 20:16:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:52,276 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2019-11-23 20:16:52,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-11-23 20:16:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2019-11-23 20:16:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:16:52,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:52,277 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:52,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:52,481 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash -91318780, now seen corresponding path program 13 times [2019-11-23 20:16:52,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:52,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060082626] [2019-11-23 20:16:52,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-23 20:16:52,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060082626] [2019-11-23 20:16:52,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706635969] [2019-11-23 20:16:52,630 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-23 20:16:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:52,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:16:52,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-23 20:16:52,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:52,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:16:52,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173314786] [2019-11-23 20:16:52,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:16:52,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:52,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:16:52,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:16:52,813 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand 22 states. [2019-11-23 20:16:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:53,422 INFO L93 Difference]: Finished difference Result 309 states and 334 transitions. [2019-11-23 20:16:53,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:16:53,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 91 [2019-11-23 20:16:53,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:53,423 INFO L225 Difference]: With dead ends: 309 [2019-11-23 20:16:53,423 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:16:53,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:16:53,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:16:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 150. [2019-11-23 20:16:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 20:16:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 160 transitions. [2019-11-23 20:16:53,438 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 160 transitions. Word has length 91 [2019-11-23 20:16:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:53,439 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 160 transitions. [2019-11-23 20:16:53,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:16:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 160 transitions. [2019-11-23 20:16:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:16:53,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:53,440 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:53,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:53,641 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:53,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:53,642 INFO L82 PathProgramCache]: Analyzing trace with hash 688277478, now seen corresponding path program 14 times [2019-11-23 20:16:53,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:53,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094179017] [2019-11-23 20:16:53,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:16:53,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094179017] [2019-11-23 20:16:53,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870489743] [2019-11-23 20:16:53,779 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-23 20:16:53,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:53,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:53,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:16:53,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:16:53,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:53,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:16:53,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374365439] [2019-11-23 20:16:53,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:16:53,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:16:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:16:53,994 INFO L87 Difference]: Start difference. First operand 150 states and 160 transitions. Second operand 22 states. [2019-11-23 20:16:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:54,819 INFO L93 Difference]: Finished difference Result 162 states and 172 transitions. [2019-11-23 20:16:54,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:16:54,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 93 [2019-11-23 20:16:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:54,821 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:16:54,821 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:16:54,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:16:54,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:16:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2019-11-23 20:16:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:16:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2019-11-23 20:16:54,833 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 93 [2019-11-23 20:16:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:54,834 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2019-11-23 20:16:54,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:16:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2019-11-23 20:16:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:16:54,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:54,835 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:16:55,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:55,038 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1101361904, now seen corresponding path program 15 times [2019-11-23 20:16:55,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:55,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216079971] [2019-11-23 20:16:55,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat