/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-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:25:49,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:25:49,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:25:49,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:25:49,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:25:49,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:25:49,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:25:49,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:25:49,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:25:49,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:25:49,707 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:25:49,708 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:25:49,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:25:49,710 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:25:49,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:25:49,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:25:49,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:25:49,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:25:49,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:25:49,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:25:49,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:25:49,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:25:49,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:25:49,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:25:49,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:25:49,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:25:49,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:25:49,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:25:49,751 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 20:25:49,784 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:25:49,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:25:49,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:25:49,788 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:25:49,788 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:25:49,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:25:49,788 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:25:49,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:25:49,789 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:25:49,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:25:49,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:25:49,790 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:25:49,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:25:49,790 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:25:49,790 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:25:49,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:25:49,790 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:25:49,791 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:25:49,791 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:25:49,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:25:49,791 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:25:49,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:25:49,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:25:49,792 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:25:49,792 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:25:49,792 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:25:49,792 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:25:49,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:25:49,793 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:25:49,793 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:25:50,076 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:25:50,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:25:50,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:25:50,094 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:25:50,095 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:25:50,096 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2019-11-23 20:25:50,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8542be631/3e58e7d4ca8b407fa1502f2aadbe86bc/FLAG3698e8a5c [2019-11-23 20:25:50,630 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:25:50,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2019-11-23 20:25:50,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8542be631/3e58e7d4ca8b407fa1502f2aadbe86bc/FLAG3698e8a5c [2019-11-23 20:25:51,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8542be631/3e58e7d4ca8b407fa1502f2aadbe86bc [2019-11-23 20:25:51,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:25:51,011 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:25:51,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:51,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:25:51,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:25:51,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de7eecd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51, skipping insertion in model container [2019-11-23 20:25:51,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:25:51,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:25:51,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:51,249 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:25:51,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:51,285 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:25:51,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51 WrapperNode [2019-11-23 20:25:51,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:51,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:51,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:25:51,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:25:51,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:51,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:25:51,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:25:51,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:25:51,406 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,426 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (1/1) ... [2019-11-23 20:25:51,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:25:51,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:25:51,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:25:51,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:25:51,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (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 20:25:51,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:25:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:25:51,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:25:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:25:51,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:25:51,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:25:51,750 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:25:51,751 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:25:51,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:51 BoogieIcfgContainer [2019-11-23 20:25:51,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:25:51,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:25:51,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:25:51,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:25:51,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:25:51" (1/3) ... [2019-11-23 20:25:51,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a23231f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:51, skipping insertion in model container [2019-11-23 20:25:51,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:51" (2/3) ... [2019-11-23 20:25:51,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a23231f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:51, skipping insertion in model container [2019-11-23 20:25:51,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:51" (3/3) ... [2019-11-23 20:25:51,775 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2019-11-23 20:25:51,795 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:25:51,802 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:25:51,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:25:51,836 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:25:51,836 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:25:51,836 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:25:51,836 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:25:51,836 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:25:51,836 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:25:51,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:25:51,837 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:25:51,849 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:25:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:25:51,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:51,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:51,857 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -952172836, now seen corresponding path program 1 times [2019-11-23 20:25:51,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:51,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131857448] [2019-11-23 20:25:51,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:52,018 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 20:25:52,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131857448] [2019-11-23 20:25:52,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:25:52,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:25:52,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594642985] [2019-11-23 20:25:52,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:25:52,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:52,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:25:52,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:25:52,041 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2019-11-23 20:25:52,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:52,119 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2019-11-23 20:25:52,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:25:52,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:25:52,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:52,130 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:25:52,130 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:25:52,136 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 20:25:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:25:52,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-23 20:25:52,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:25:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-23 20:25:52,168 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2019-11-23 20:25:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:52,169 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-23 20:25:52,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:25:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-23 20:25:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:25:52,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:52,170 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:52,170 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:52,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1567052653, now seen corresponding path program 1 times [2019-11-23 20:25:52,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:52,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019193117] [2019-11-23 20:25:52,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:25:52,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019193117] [2019-11-23 20:25:52,248 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882480858] [2019-11-23 20:25:52,248 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 20:25:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:52,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:25:52,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:25:52,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:52,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:25:52,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22120937] [2019-11-23 20:25:52,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:25:52,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:52,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:25:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:52,347 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 5 states. [2019-11-23 20:25:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:52,433 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2019-11-23 20:25:52,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:25:52,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:25:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:52,436 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:25:52,436 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:25:52,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:52,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:25:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-11-23 20:25:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:25:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-23 20:25:52,450 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2019-11-23 20:25:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:52,450 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-23 20:25:52,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:25:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-23 20:25:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:25:52,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:52,454 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:52,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:52,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:52,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:52,659 INFO L82 PathProgramCache]: Analyzing trace with hash 159288628, now seen corresponding path program 2 times [2019-11-23 20:25:52,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:52,661 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664963342] [2019-11-23 20:25:52,661 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:25:52,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664963342] [2019-11-23 20:25:52,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824685599] [2019-11-23 20:25:52,788 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 20:25:52,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:52,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:52,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:25:52,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:25:52,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:52,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:25:52,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84441625] [2019-11-23 20:25:52,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:25:52,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:25:52,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:52,856 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2019-11-23 20:25:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:52,923 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-23 20:25:52,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:25:52,924 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-23 20:25:52,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:52,925 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:25:52,925 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:25:52,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:25:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-23 20:25:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:25:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-23 20:25:52,933 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 21 [2019-11-23 20:25:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:52,933 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-23 20:25:52,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:25:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-23 20:25:52,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:25:52,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:52,935 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:53,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:53,139 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:53,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:53,140 INFO L82 PathProgramCache]: Analyzing trace with hash 2098372907, now seen corresponding path program 3 times [2019-11-23 20:25:53,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:53,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623414484] [2019-11-23 20:25:53,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:25:53,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623414484] [2019-11-23 20:25:53,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949273300] [2019-11-23 20:25:53,283 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 20:25:53,351 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:25:53,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:53,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:25:53,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:25:53,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:53,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:25:53,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218800572] [2019-11-23 20:25:53,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:25:53,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:53,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:25:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:25:53,380 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2019-11-23 20:25:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:53,467 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-11-23 20:25:53,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:25:53,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-23 20:25:53,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:53,471 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:25:53,471 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:25:53,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:25:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:25:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:25:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:25:53,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-11-23 20:25:53,478 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2019-11-23 20:25:53,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:53,478 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-11-23 20:25:53,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:25:53,479 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-11-23 20:25:53,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:25:53,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:53,480 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:53,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:53,690 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1609282676, now seen corresponding path program 4 times [2019-11-23 20:25:53,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:53,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872581787] [2019-11-23 20:25:53,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:25:53,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872581787] [2019-11-23 20:25:53,813 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47747543] [2019-11-23 20:25:53,813 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 20:25:53,869 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:25:53,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:53,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:25:53,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:53,889 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:25:53,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:53,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:25:53,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009949271] [2019-11-23 20:25:53,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:25:53,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:53,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:25:53,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:53,893 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2019-11-23 20:25:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:53,996 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-23 20:25:53,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:25:53,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-11-23 20:25:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:53,997 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:25:53,997 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:25:53,998 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:25:54,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-23 20:25:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:25:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-11-23 20:25:54,004 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2019-11-23 20:25:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:54,005 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-11-23 20:25:54,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:25:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-11-23 20:25:54,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:25:54,006 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,006 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:54,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:54,211 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1784739267, now seen corresponding path program 5 times [2019-11-23 20:25:54,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:54,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013124491] [2019-11-23 20:25:54,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:25:54,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013124491] [2019-11-23 20:25:54,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94637058] [2019-11-23 20:25:54,325 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 20:25:54,529 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:25:54,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:54,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:25:54,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:25:54,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:54,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:25:54,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560933230] [2019-11-23 20:25:54,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:25:54,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:25:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:54,560 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 9 states. [2019-11-23 20:25:54,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:54,658 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2019-11-23 20:25:54,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:25:54,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-11-23 20:25:54,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:54,661 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:25:54,661 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:25:54,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:25:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-11-23 20:25:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:25:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:25:54,677 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2019-11-23 20:25:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:54,677 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:25:54,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:25:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:25:54,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:25:54,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,679 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:54,883 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:54,884 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:54,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2008431076, now seen corresponding path program 6 times [2019-11-23 20:25:54,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:54,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544214765] [2019-11-23 20:25:54,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,970 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:25:54,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544214765] [2019-11-23 20:25:54,971 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244996575] [2019-11-23 20:25:54,971 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 20:25:55,120 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:25:55,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:55,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:25:55,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:25:55,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:55,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:25:55,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804950404] [2019-11-23 20:25:55,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:25:55,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:25:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:55,144 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 10 states. [2019-11-23 20:25:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:55,248 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2019-11-23 20:25:55,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:25:55,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:25:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:55,249 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:25:55,249 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:25:55,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:25:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-23 20:25:55,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:25:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2019-11-23 20:25:55,257 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2019-11-23 20:25:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:55,257 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2019-11-23 20:25:55,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:25:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2019-11-23 20:25:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:25:55,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:55,259 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:55,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:55,469 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:55,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash -700601765, now seen corresponding path program 7 times [2019-11-23 20:25:55,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:55,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748791916] [2019-11-23 20:25:55,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:25:55,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748791916] [2019-11-23 20:25:55,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055386279] [2019-11-23 20:25:55,633 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 20:25:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:25:55,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 20:25:55,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:55,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:25:55,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998258435] [2019-11-23 20:25:55,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:25:55,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:55,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:25:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:55,721 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 11 states. [2019-11-23 20:25:55,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:55,850 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2019-11-23 20:25:55,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:25:55,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2019-11-23 20:25:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:55,852 INFO L225 Difference]: With dead ends: 95 [2019-11-23 20:25:55,852 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:25:55,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:25:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2019-11-23 20:25:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:25:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-11-23 20:25:55,866 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 46 [2019-11-23 20:25:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:55,870 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-11-23 20:25:55,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:25:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-11-23 20:25:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:25:55,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:55,874 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:56,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:56,078 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:56,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:56,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1469732924, now seen corresponding path program 8 times [2019-11-23 20:25:56,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:56,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095196633] [2019-11-23 20:25:56,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:56,197 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:56,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095196633] [2019-11-23 20:25:56,198 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129618354] [2019-11-23 20:25:56,198 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 20:25:56,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:56,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:56,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:25:56,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:56,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:56,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:25:56,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399667835] [2019-11-23 20:25:56,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:25:56,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:56,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:25:56,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:56,322 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 12 states. [2019-11-23 20:25:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:56,441 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2019-11-23 20:25:56,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:25:56,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2019-11-23 20:25:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:56,443 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:25:56,443 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:25:56,444 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:25:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:25:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-11-23 20:25:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:25:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:25:56,453 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2019-11-23 20:25:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:56,454 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:25:56,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:25:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:25:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:25:56,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:56,458 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:56,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:56,662 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:56,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:56,662 INFO L82 PathProgramCache]: Analyzing trace with hash 300072691, now seen corresponding path program 9 times [2019-11-23 20:25:56,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:56,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075242588] [2019-11-23 20:25:56,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:25:56,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075242588] [2019-11-23 20:25:56,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039271794] [2019-11-23 20:25:56,826 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 20:25:57,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:25:57,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:57,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:25:57,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-23 20:25:57,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:57,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:25:57,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534616124] [2019-11-23 20:25:57,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:25:57,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:25:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:25:57,181 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 13 states. [2019-11-23 20:25:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:57,289 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2019-11-23 20:25:57,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:25:57,290 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-11-23 20:25:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:57,290 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:25:57,291 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:25:57,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:25:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:25:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-11-23 20:25:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:25:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-11-23 20:25:57,298 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2019-11-23 20:25:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:57,298 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-11-23 20:25:57,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:25:57,298 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-11-23 20:25:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:25:57,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:57,299 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:57,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:57,504 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1049188716, now seen corresponding path program 10 times [2019-11-23 20:25:57,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:57,505 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094159915] [2019-11-23 20:25:57,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:57,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094159915] [2019-11-23 20:25:57,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517750065] [2019-11-23 20:25:57,647 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 20:25:57,704 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:25:57,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:57,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:25:57,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 20:25:57,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:57,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:25:57,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014645916] [2019-11-23 20:25:57,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:25:57,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:57,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:25:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:25:57,745 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 14 states. [2019-11-23 20:25:57,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:57,872 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2019-11-23 20:25:57,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:25:57,873 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2019-11-23 20:25:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:57,874 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:25:57,875 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:25:57,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:25:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:25:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-23 20:25:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:25:57,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2019-11-23 20:25:57,882 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2019-11-23 20:25:57,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:57,882 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2019-11-23 20:25:57,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:25:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2019-11-23 20:25:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 20:25:57,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:57,884 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:58,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:58,090 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1946825611, now seen corresponding path program 11 times [2019-11-23 20:25:58,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:58,092 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107617331] [2019-11-23 20:25:58,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-23 20:25:58,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107617331] [2019-11-23 20:25:58,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555428428] [2019-11-23 20:25:58,232 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 20:26:16,503 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:26:16,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:16,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:26:16,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 20:26:16,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:16,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:26:16,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619205983] [2019-11-23 20:26:16,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:26:16,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:26:16,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:16,548 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 15 states. [2019-11-23 20:26:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:16,668 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2019-11-23 20:26:16,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:26:16,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2019-11-23 20:26:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:16,670 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:26:16,670 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:26:16,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:16,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:26:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-11-23 20:26:16,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:26:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-23 20:26:16,677 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 66 [2019-11-23 20:26:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:16,677 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-23 20:26:16,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:26:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-23 20:26:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:26:16,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:16,679 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:16,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:16,890 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:16,890 INFO L82 PathProgramCache]: Analyzing trace with hash -780065556, now seen corresponding path program 12 times [2019-11-23 20:26:16,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:16,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230065198] [2019-11-23 20:26:16,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:26:17,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230065198] [2019-11-23 20:26:17,035 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629106484] [2019-11-23 20:26:17,035 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 20:26:25,935 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:26:25,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:25,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:26:25,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 20:26:25,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:25,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:26:25,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111456574] [2019-11-23 20:26:25,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:26:25,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:26:25,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:25,983 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 16 states. [2019-11-23 20:26:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:26,110 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-11-23 20:26:26,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:26:26,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2019-11-23 20:26:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:26,111 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:26:26,112 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:26:26,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:26:26,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-11-23 20:26:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:26:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-23 20:26:26,125 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2019-11-23 20:26:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:26,125 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-23 20:26:26,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:26:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-23 20:26:26,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:26:26,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:26,126 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:26,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:26,336 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:26,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2028865571, now seen corresponding path program 13 times [2019-11-23 20:26:26,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:26,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179262232] [2019-11-23 20:26:26,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 20:26:26,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179262232] [2019-11-23 20:26:26,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600074203] [2019-11-23 20:26:26,536 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 20:26:26,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:26,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:26:26,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-23 20:26:26,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:26,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:26:26,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907419515] [2019-11-23 20:26:26,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:26:26,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:26:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:26,633 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 17 states. [2019-11-23 20:26:26,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:26,773 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2019-11-23 20:26:26,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:26:26,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2019-11-23 20:26:26,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:26,775 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:26:26,775 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:26:26,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:26:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:26:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:26:26,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:26:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2019-11-23 20:26:26,782 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 76 [2019-11-23 20:26:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:26,782 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2019-11-23 20:26:26,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:26:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2019-11-23 20:26:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:26:26,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:26,783 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:26,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:26,992 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:26,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:26,992 INFO L82 PathProgramCache]: Analyzing trace with hash 510645060, now seen corresponding path program 14 times [2019-11-23 20:26:26,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:26,993 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729417588] [2019-11-23 20:26:26,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:26:27,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729417588] [2019-11-23 20:26:27,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652709002] [2019-11-23 20:26:27,178 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 20:26:27,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:27,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:27,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:26:27,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:26:27,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:27,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:26:27,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400701744] [2019-11-23 20:26:27,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:26:27,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:26:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:27,264 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 18 states. [2019-11-23 20:26:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:27,432 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-23 20:26:27,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:26:27,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2019-11-23 20:26:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:27,434 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:26:27,434 INFO L226 Difference]: Without dead ends: 91 [2019-11-23 20:26:27,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-11-23 20:26:27,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-11-23 20:26:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:26:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2019-11-23 20:26:27,447 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 81 [2019-11-23 20:26:27,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:27,450 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2019-11-23 20:26:27,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:26:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2019-11-23 20:26:27,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:26:27,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:27,453 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:27,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:27,657 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:27,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:27,658 INFO L82 PathProgramCache]: Analyzing trace with hash -498582341, now seen corresponding path program 15 times [2019-11-23 20:26:27,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:27,658 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48555788] [2019-11-23 20:26:27,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-23 20:26:27,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48555788] [2019-11-23 20:26:27,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737652958] [2019-11-23 20:26:27,837 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:32,104 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:26:32,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:32,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:26:32,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-23 20:26:32,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:32,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:26:32,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837799698] [2019-11-23 20:26:32,130 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:26:32,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:32,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:26:32,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:32,131 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 19 states. [2019-11-23 20:26:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:32,300 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2019-11-23 20:26:32,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:26:32,300 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-11-23 20:26:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:32,302 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:26:32,302 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:26:32,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:32,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:26:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-11-23 20:26:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:26:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2019-11-23 20:26:32,309 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2019-11-23 20:26:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:32,311 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2019-11-23 20:26:32,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:26:32,312 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2019-11-23 20:26:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:26:32,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:32,313 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:32,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:32,520 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:32,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1720143460, now seen corresponding path program 16 times [2019-11-23 20:26:32,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:32,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929804287] [2019-11-23 20:26:32,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-11-23 20:26:32,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929804287] [2019-11-23 20:26:32,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209024740] [2019-11-23 20:26:32,733 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:32,795 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:32,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:32,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:26:32,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:26:32,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:32,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:26:32,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919297017] [2019-11-23 20:26:32,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:26:32,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:26:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:32,840 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 20 states. [2019-11-23 20:26:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:32,992 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2019-11-23 20:26:32,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:26:32,993 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2019-11-23 20:26:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:32,994 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:26:32,994 INFO L226 Difference]: Without dead ends: 101 [2019-11-23 20:26:32,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-23 20:26:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2019-11-23 20:26:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:26:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2019-11-23 20:26:33,000 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 91 [2019-11-23 20:26:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:33,000 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2019-11-23 20:26:33,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:26:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2019-11-23 20:26:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:26:33,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:33,001 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:33,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:33,208 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash -682438317, now seen corresponding path program 17 times [2019-11-23 20:26:33,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:33,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15644648] [2019-11-23 20:26:33,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-23 20:26:33,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15644648] [2019-11-23 20:26:33,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438901214] [2019-11-23 20:26:33,428 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true