/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_password_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:33:10,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:33:10,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:33:11,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:33:11,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:33:11,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:33:11,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:33:11,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:33:11,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:33:11,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:33:11,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:33:11,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:33:11,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:33:11,021 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:33:11,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:33:11,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:33:11,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:33:11,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:33:11,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:33:11,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:33:11,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:33:11,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:33:11,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:33:11,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:33:11,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:33:11,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:33:11,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:33:11,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:33:11,049 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 20:33:11,070 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:33:11,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:33:11,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:33:11,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:33:11,072 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:33:11,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:33:11,072 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:33:11,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:33:11,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:33:11,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:33:11,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:33:11,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:33:11,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:33:11,074 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:33:11,074 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:33:11,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:33:11,074 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:33:11,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:33:11,075 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:33:11,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:33:11,075 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:33:11,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:33:11,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:33:11,076 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:33:11,076 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:33:11,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:33:11,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:33:11,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:33:11,077 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:33:11,077 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:33:11,344 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:33:11,356 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:33:11,359 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:33:11,361 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:33:11,361 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:33:11,362 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-11-23 20:33:11,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e3d901a/ac5c10832922476e9adc1d68e957eeb4/FLAGb29593468 [2019-11-23 20:33:11,824 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:33:11,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_password_ground.i [2019-11-23 20:33:11,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e3d901a/ac5c10832922476e9adc1d68e957eeb4/FLAGb29593468 [2019-11-23 20:33:11,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1e3d901a/ac5c10832922476e9adc1d68e957eeb4 [2019-11-23 20:33:11,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:33:11,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:33:11,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:11,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:33:11,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:33:11,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f7d9541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:11, skipping insertion in model container [2019-11-23 20:33:11,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:11" (1/1) ... [2019-11-23 20:33:11,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:33:11,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:33:12,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:12,039 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:33:12,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:33:12,076 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:33:12,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12 WrapperNode [2019-11-23 20:33:12,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:33:12,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:12,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:33:12,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:33:12,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,211 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:33:12,211 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:33:12,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:33:12,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:33:12,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (1/1) ... [2019-11-23 20:33:12,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:33:12,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:33:12,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:33:12,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:33:12,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (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 20:33:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:33:12,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:33:12,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:33:12,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:33:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:33:12,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:33:12,648 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:33:12,649 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:33:12,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:12 BoogieIcfgContainer [2019-11-23 20:33:12,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:33:12,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:33:12,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:33:12,663 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:33:12,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:11" (1/3) ... [2019-11-23 20:33:12,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e986e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:12, skipping insertion in model container [2019-11-23 20:33:12,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:12" (2/3) ... [2019-11-23 20:33:12,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e986e3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:12, skipping insertion in model container [2019-11-23 20:33:12,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:12" (3/3) ... [2019-11-23 20:33:12,672 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_password_ground.i [2019-11-23 20:33:12,691 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:33:12,699 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:33:12,717 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:33:12,745 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:33:12,745 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:33:12,745 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:33:12,745 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:33:12,745 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:33:12,746 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:33:12,746 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:33:12,746 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:33:12,760 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:33:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:33:12,767 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:12,768 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:12,768 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2006075616, now seen corresponding path program 1 times [2019-11-23 20:33:12,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:12,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983976730] [2019-11-23 20:33:12,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:12,918 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 20:33:12,919 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983976730] [2019-11-23 20:33:12,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:12,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:33:12,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203240219] [2019-11-23 20:33:12,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:33:12,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:12,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:33:12,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:12,945 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:33:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:12,964 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2019-11-23 20:33:12,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:33:12,966 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:33:12,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:12,976 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:33:12,976 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:33:12,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:33:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:33:13,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:33:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:33:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:33:13,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-23 20:33:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,017 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:33:13,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:33:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:33:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:33:13,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,019 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:13,019 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2016234347, now seen corresponding path program 1 times [2019-11-23 20:33:13,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:13,020 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029726818] [2019-11-23 20:33:13,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,075 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 20:33:13,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029726818] [2019-11-23 20:33:13,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:13,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:13,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529480930] [2019-11-23 20:33:13,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:13,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:13,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:13,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:13,081 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2019-11-23 20:33:13,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,160 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-23 20:33:13,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:13,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:33:13,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,161 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:33:13,161 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:33:13,162 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 20:33:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:33:13,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2019-11-23 20:33:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:33:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:33:13,169 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2019-11-23 20:33:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,169 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:33:13,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:33:13,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:33:13,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,170 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:13,171 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash -324076335, now seen corresponding path program 1 times [2019-11-23 20:33:13,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:13,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474078503] [2019-11-23 20:33:13,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:13,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474078503] [2019-11-23 20:33:13,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:33:13,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:33:13,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964170492] [2019-11-23 20:33:13,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:33:13,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:33:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:33:13,256 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2019-11-23 20:33:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,273 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-23 20:33:13,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:33:13,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:33:13,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,274 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:33:13,275 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:33:13,275 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 20:33:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:33:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:33:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:33:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 20:33:13,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-23 20:33:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,281 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 20:33:13,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:33:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 20:33:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:33:13,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,282 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:13,283 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:13,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:13,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1450931027, now seen corresponding path program 1 times [2019-11-23 20:33:13,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:13,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608206435] [2019-11-23 20:33:13,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:13,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608206435] [2019-11-23 20:33:13,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587823953] [2019-11-23 20:33:13,382 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 20:33:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:33:13,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:33:13,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:13,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:33:13,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682802863] [2019-11-23 20:33:13,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:33:13,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:13,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:33:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:33:13,477 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-11-23 20:33:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,528 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-11-23 20:33:13,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:33:13,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:33:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,530 INFO L225 Difference]: With dead ends: 37 [2019-11-23 20:33:13,530 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:33:13,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:33:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:33:13,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-23 20:33:13,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:33:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 20:33:13,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-23 20:33:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:13,540 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 20:33:13,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:33:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 20:33:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:33:13,542 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:13,542 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:13,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:13,747 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:13,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1177321199, now seen corresponding path program 2 times [2019-11-23 20:33:13,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:13,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967134471] [2019-11-23 20:33:13,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:33:13,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967134471] [2019-11-23 20:33:13,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070595441] [2019-11-23 20:33:13,822 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 20:33:13,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:13,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:13,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:33:13,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:33:13,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:13,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:33:13,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253448032] [2019-11-23 20:33:13,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:33:13,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:13,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:33:13,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:33:13,920 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2019-11-23 20:33:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:13,992 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-11-23 20:33:13,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:33:13,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:33:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:13,995 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:33:13,995 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:33:13,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:33:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:33:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:33:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:33:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:33:14,005 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-11-23 20:33:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:14,005 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:33:14,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:33:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:33:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:33:14,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:14,008 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:14,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:14,216 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:14,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:14,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1757833943, now seen corresponding path program 3 times [2019-11-23 20:33:14,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:14,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103137287] [2019-11-23 20:33:14,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:14,302 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:33:14,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103137287] [2019-11-23 20:33:14,302 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186264231] [2019-11-23 20:33:14,303 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 20:33:14,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:33:14,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:14,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:33:14,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:14,398 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:33:14,399 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:14,415 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:14,416 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:14,416 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:33:14,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:33:14,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:14,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-11-23 20:33:14,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230915409] [2019-11-23 20:33:14,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:33:14,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:33:14,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:14,597 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 12 states. [2019-11-23 20:33:14,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:14,967 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2019-11-23 20:33:14,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:33:14,969 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2019-11-23 20:33:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:14,970 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:33:14,971 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:33:14,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:14,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:33:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2019-11-23 20:33:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:33:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 20:33:14,988 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2019-11-23 20:33:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:14,988 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 20:33:14,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:33:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 20:33:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:33:14,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:14,990 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:15,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:15,197 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:15,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:15,197 INFO L82 PathProgramCache]: Analyzing trace with hash -986484797, now seen corresponding path program 1 times [2019-11-23 20:33:15,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:15,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606792230] [2019-11-23 20:33:15,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:33:15,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606792230] [2019-11-23 20:33:15,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211557019] [2019-11-23 20:33:15,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:15,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:33:15,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:33:15,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:15,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:33:15,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924677856] [2019-11-23 20:33:15,387 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:33:15,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:15,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:33:15,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:33:15,388 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 8 states. [2019-11-23 20:33:15,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:15,451 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2019-11-23 20:33:15,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:33:15,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:33:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:15,456 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:33:15,457 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:33:15,457 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 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 20:33:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:33:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-23 20:33:15,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:33:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-23 20:33:15,470 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2019-11-23 20:33:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:15,470 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-23 20:33:15,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:33:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-23 20:33:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:33:15,471 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:15,471 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:15,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:15,677 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1169210769, now seen corresponding path program 2 times [2019-11-23 20:33:15,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:15,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541942251] [2019-11-23 20:33:15,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:33:15,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541942251] [2019-11-23 20:33:15,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928724207] [2019-11-23 20:33:15,806 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 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 20:33:15,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:15,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:15,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:33:15,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:33:15,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:15,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:33:15,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394043024] [2019-11-23 20:33:15,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:33:15,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:33:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:33:15,903 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 9 states. [2019-11-23 20:33:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:15,975 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2019-11-23 20:33:15,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:33:15,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-23 20:33:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:15,977 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:33:15,977 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:33:15,978 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 20:33:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:33:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-23 20:33:15,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:33:15,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-23 20:33:15,984 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 38 [2019-11-23 20:33:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:15,985 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-23 20:33:15,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:33:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-23 20:33:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:33:15,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:15,986 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:16,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:16,190 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash -6803905, now seen corresponding path program 3 times [2019-11-23 20:33:16,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:16,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289257939] [2019-11-23 20:33:16,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:33:16,299 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289257939] [2019-11-23 20:33:16,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876527794] [2019-11-23 20:33:16,300 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 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 20:33:16,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:33:16,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:16,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:33:16,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:16,382 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:33:16,383 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:16,390 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:16,390 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:16,390 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:33:16,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:16,574 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-11-23 20:33:16,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:16,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-11-23 20:33:16,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846562495] [2019-11-23 20:33:16,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:33:16,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:16,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:33:16,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:16,577 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2019-11-23 20:33:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:17,136 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2019-11-23 20:33:17,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:33:17,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-11-23 20:33:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:17,137 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:33:17,137 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:33:17,138 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=817, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:33:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:33:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-11-23 20:33:17,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:33:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-11-23 20:33:17,146 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 43 [2019-11-23 20:33:17,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:17,146 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-11-23 20:33:17,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:33:17,147 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-11-23 20:33:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:33:17,148 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:17,148 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:17,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:17,353 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1830402379, now seen corresponding path program 4 times [2019-11-23 20:33:17,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:17,354 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136963389] [2019-11-23 20:33:17,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:17,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:33:17,483 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136963389] [2019-11-23 20:33:17,484 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454366296] [2019-11-23 20:33:17,484 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 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 20:33:17,542 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:17,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:17,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:33:17,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:33:17,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:17,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:33:17,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216150262] [2019-11-23 20:33:17,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:33:17,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:33:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:33:17,571 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 11 states. [2019-11-23 20:33:17,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:17,652 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2019-11-23 20:33:17,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:33:17,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2019-11-23 20:33:17,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:17,653 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:33:17,653 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:33:17,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 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 20:33:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:33:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-23 20:33:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:33:17,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-23 20:33:17,662 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2019-11-23 20:33:17,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:17,662 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-23 20:33:17,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:33:17,662 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-23 20:33:17,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:33:17,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:17,663 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:17,867 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:17,868 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1242544143, now seen corresponding path program 5 times [2019-11-23 20:33:17,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:17,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082601140] [2019-11-23 20:33:17,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:33:18,008 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082601140] [2019-11-23 20:33:18,009 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074878168] [2019-11-23 20:33:18,009 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 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 20:33:18,372 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-23 20:33:18,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:18,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:33:18,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:33:18,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:33:18,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581559460] [2019-11-23 20:33:18,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:33:18,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:18,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:33:18,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:33:18,395 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 12 states. [2019-11-23 20:33:18,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:18,496 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2019-11-23 20:33:18,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:33:18,499 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:33:18,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:18,500 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:33:18,500 INFO L226 Difference]: Without dead ends: 66 [2019-11-23 20:33:18,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 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 20:33:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-11-23 20:33:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2019-11-23 20:33:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 20:33:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-11-23 20:33:18,508 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2019-11-23 20:33:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:18,508 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-11-23 20:33:18,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:33:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-11-23 20:33:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:33:18,510 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:18,510 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:18,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:18,719 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:18,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:18,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1458951375, now seen corresponding path program 6 times [2019-11-23 20:33:18,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:18,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145379937] [2019-11-23 20:33:18,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:18,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-23 20:33:18,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145379937] [2019-11-23 20:33:18,853 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526069271] [2019-11-23 20:33:18,854 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 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 20:33:18,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-23 20:33:18,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:18,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:33:18,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:18,972 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:33:18,973 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:18,980 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:18,980 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:18,980 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:33:19,184 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-23 20:33:19,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:19,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-11-23 20:33:19,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669454957] [2019-11-23 20:33:19,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:33:19,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:19,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:33:19,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:33:19,235 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 22 states. [2019-11-23 20:33:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,116 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2019-11-23 20:33:20,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:33:20,116 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2019-11-23 20:33:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,117 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:33:20,117 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:33:20,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=1417, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:33:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:33:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2019-11-23 20:33:20,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:33:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-11-23 20:33:20,127 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2019-11-23 20:33:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,127 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-11-23 20:33:20,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:33:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-11-23 20:33:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:33:20,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,129 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:20,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:20,333 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1792785757, now seen corresponding path program 7 times [2019-11-23 20:33:20,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998071156] [2019-11-23 20:33:20,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 20:33:20,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998071156] [2019-11-23 20:33:20,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728492020] [2019-11-23 20:33:20,496 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 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 20:33:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:20,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:33:20,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 20:33:20,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:20,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:33:20,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664222745] [2019-11-23 20:33:20,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:33:20,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:33:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:33:20,593 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 14 states. [2019-11-23 20:33:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:20,688 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2019-11-23 20:33:20,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:33:20,688 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2019-11-23 20:33:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:20,689 INFO L225 Difference]: With dead ends: 129 [2019-11-23 20:33:20,689 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:33:20,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 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 20:33:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:33:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2019-11-23 20:33:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:33:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-11-23 20:33:20,698 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2019-11-23 20:33:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:20,698 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-11-23 20:33:20,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:33:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-11-23 20:33:20,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:33:20,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:20,700 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:20,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:20,908 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:20,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1017753719, now seen corresponding path program 8 times [2019-11-23 20:33:20,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:20,909 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850089907] [2019-11-23 20:33:20,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-11-23 20:33:21,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850089907] [2019-11-23 20:33:21,113 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906429950] [2019-11-23 20:33:21,113 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 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 20:33:21,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:21,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:21,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:33:21,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2019-11-23 20:33:21,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:21,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:33:21,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221463831] [2019-11-23 20:33:21,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:33:21,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:21,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:33:21,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:33:21,216 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 15 states. [2019-11-23 20:33:21,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:21,312 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2019-11-23 20:33:21,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:33:21,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2019-11-23 20:33:21,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:21,313 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:33:21,313 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:33:21,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:33:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:33:21,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2019-11-23 20:33:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:33:21,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2019-11-23 20:33:21,327 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2019-11-23 20:33:21,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:21,327 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2019-11-23 20:33:21,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:33:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2019-11-23 20:33:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:33:21,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:21,329 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:21,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:21,540 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:21,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:21,541 INFO L82 PathProgramCache]: Analyzing trace with hash -525419233, now seen corresponding path program 9 times [2019-11-23 20:33:21,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:21,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645408364] [2019-11-23 20:33:21,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-23 20:33:21,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645408364] [2019-11-23 20:33:21,723 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551236771] [2019-11-23 20:33:21,723 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 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 20:33:21,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:33:21,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:21,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:33:21,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:21,986 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:33:21,987 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:21,995 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:21,995 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:21,996 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:33:22,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2019-11-23 20:33:22,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:22,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2019-11-23 20:33:22,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424297314] [2019-11-23 20:33:22,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:33:22,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:33:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:33:22,315 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 27 states. [2019-11-23 20:33:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:23,473 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2019-11-23 20:33:23,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:33:23,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 81 [2019-11-23 20:33:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:23,474 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:33:23,474 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:33:23,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=577, Invalid=2179, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:33:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:33:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2019-11-23 20:33:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 20:33:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2019-11-23 20:33:23,483 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 81 [2019-11-23 20:33:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:23,484 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2019-11-23 20:33:23,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:33:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2019-11-23 20:33:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 20:33:23,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:23,485 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:23,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:23,691 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:23,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:23,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1510198461, now seen corresponding path program 10 times [2019-11-23 20:33:23,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:23,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933132712] [2019-11-23 20:33:23,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-23 20:33:23,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933132712] [2019-11-23 20:33:23,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197036079] [2019-11-23 20:33:23,884 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 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 20:33:23,953 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:23,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:23,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:33:23,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-23 20:33:23,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:23,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:33:23,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250958522] [2019-11-23 20:33:23,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:33:23,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:23,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:33:23,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:33:23,986 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 17 states. [2019-11-23 20:33:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:24,088 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2019-11-23 20:33:24,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:33:24,088 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2019-11-23 20:33:24,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:24,089 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:33:24,089 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:33:24,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 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 20:33:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:33:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2019-11-23 20:33:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:33:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-11-23 20:33:24,096 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 90 [2019-11-23 20:33:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:24,097 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-11-23 20:33:24,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:33:24,097 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-11-23 20:33:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:33:24,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:24,098 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:24,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:24,302 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:24,303 INFO L82 PathProgramCache]: Analyzing trace with hash -658545967, now seen corresponding path program 11 times [2019-11-23 20:33:24,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:24,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649215991] [2019-11-23 20:33:24,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2019-11-23 20:33:24,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649215991] [2019-11-23 20:33:24,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286182144] [2019-11-23 20:33:24,487 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 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 20:33:34,042 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-23 20:33:34,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:34,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:33:34,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-23 20:33:34,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:34,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:33:34,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879524798] [2019-11-23 20:33:34,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:33:34,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:33:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:33:34,074 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2019-11-23 20:33:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:34,194 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2019-11-23 20:33:34,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:33:34,195 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2019-11-23 20:33:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:34,196 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:33:34,196 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:33:34,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 95 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 20:33:34,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:33:34,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-11-23 20:33:34,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:33:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2019-11-23 20:33:34,202 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2019-11-23 20:33:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:34,203 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2019-11-23 20:33:34,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:33:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2019-11-23 20:33:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 20:33:34,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:34,204 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:34,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:34,413 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1660177721, now seen corresponding path program 12 times [2019-11-23 20:33:34,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:34,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506073956] [2019-11-23 20:33:34,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2019-11-23 20:33:34,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506073956] [2019-11-23 20:33:34,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472020839] [2019-11-23 20:33:34,622 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 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 20:33:35,223 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-11-23 20:33:35,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:35,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:33:35,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:35,234 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:33:35,235 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:35,240 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:35,241 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:35,241 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:33:35,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2019-11-23 20:33:35,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:35,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2019-11-23 20:33:35,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259979357] [2019-11-23 20:33:35,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:33:35,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:33:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:33:35,629 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 32 states. [2019-11-23 20:33:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:37,164 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2019-11-23 20:33:37,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:33:37,165 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 100 [2019-11-23 20:33:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:37,166 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:33:37,166 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:33:37,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=803, Invalid=3103, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 20:33:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:33:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2019-11-23 20:33:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:33:37,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-11-23 20:33:37,174 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 100 [2019-11-23 20:33:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:37,174 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-11-23 20:33:37,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:33:37,174 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-11-23 20:33:37,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:33:37,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:37,175 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:37,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:37,380 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1782896253, now seen corresponding path program 13 times [2019-11-23 20:33:37,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:37,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217461706] [2019-11-23 20:33:37,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:37,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:33:37,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217461706] [2019-11-23 20:33:37,570 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114273989] [2019-11-23 20:33:37,570 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 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 20:33:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:37,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:33:37,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:33:37,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:37,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:33:37,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863540475] [2019-11-23 20:33:37,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:33:37,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:37,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:33:37,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:33:37,683 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 20 states. [2019-11-23 20:33:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:37,803 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2019-11-23 20:33:37,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:33:37,804 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 109 [2019-11-23 20:33:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:37,804 INFO L225 Difference]: With dead ends: 193 [2019-11-23 20:33:37,805 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:33:37,805 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 109 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 20:33:37,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:33:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2019-11-23 20:33:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:33:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2019-11-23 20:33:37,811 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2019-11-23 20:33:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:37,811 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2019-11-23 20:33:37,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:33:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2019-11-23 20:33:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 20:33:37,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:37,813 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:38,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:38,017 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:38,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:38,017 INFO L82 PathProgramCache]: Analyzing trace with hash 814388609, now seen corresponding path program 14 times [2019-11-23 20:33:38,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:38,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747277423] [2019-11-23 20:33:38,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:38,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:38,310 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2019-11-23 20:33:38,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747277423] [2019-11-23 20:33:38,310 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743408395] [2019-11-23 20:33:38,310 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 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 [2019-11-23 20:33:38,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:33:38,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:38,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:33:38,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 764 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2019-11-23 20:33:38,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:38,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:33:38,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240036913] [2019-11-23 20:33:38,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:33:38,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:38,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:33:38,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:38,512 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 21 states. [2019-11-23 20:33:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:38,712 INFO L93 Difference]: Finished difference Result 201 states and 206 transitions. [2019-11-23 20:33:38,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:33:38,712 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 114 [2019-11-23 20:33:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:38,713 INFO L225 Difference]: With dead ends: 201 [2019-11-23 20:33:38,714 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:33:38,714 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:33:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:33:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2019-11-23 20:33:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:33:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-11-23 20:33:38,721 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 114 [2019-11-23 20:33:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:38,721 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-11-23 20:33:38,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:33:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-11-23 20:33:38,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:33:38,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:38,723 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:38,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:38,934 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash -701947905, now seen corresponding path program 15 times [2019-11-23 20:33:38,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:38,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173897288] [2019-11-23 20:33:38,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2019-11-23 20:33:39,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173897288] [2019-11-23 20:33:39,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228682737] [2019-11-23 20:33:39,206 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:40,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:33:40,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:40,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:33:40,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:40,481 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:33:40,481 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:33:40,489 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:33:40,489 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:33:40,490 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:33:40,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:33:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 0 proven. 305 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2019-11-23 20:33:40,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:40,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2019-11-23 20:33:40,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911080547] [2019-11-23 20:33:40,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:33:40,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:40,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:33:40,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=983, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:33:40,951 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 37 states. [2019-11-23 20:33:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:43,074 INFO L93 Difference]: Finished difference Result 216 states and 222 transitions. [2019-11-23 20:33:43,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:33:43,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 119 [2019-11-23 20:33:43,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:43,076 INFO L225 Difference]: With dead ends: 216 [2019-11-23 20:33:43,076 INFO L226 Difference]: Without dead ends: 135 [2019-11-23 20:33:43,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1067, Invalid=4189, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 20:33:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-23 20:33:43,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2019-11-23 20:33:43,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:33:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2019-11-23 20:33:43,085 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 119 [2019-11-23 20:33:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:43,086 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2019-11-23 20:33:43,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:33:43,086 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2019-11-23 20:33:43,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:33:43,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:43,087 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:43,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:43,294 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:43,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1370119877, now seen corresponding path program 16 times [2019-11-23 20:33:43,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:43,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545097019] [2019-11-23 20:33:43,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2019-11-23 20:33:43,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545097019] [2019-11-23 20:33:43,583 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050905813] [2019-11-23 20:33:43,583 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:43,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:33:43,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:33:43,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:33:43,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:33:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2019-11-23 20:33:43,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:33:43,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:33:43,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181507068] [2019-11-23 20:33:43,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:33:43,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:33:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:33:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:43,729 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 23 states. [2019-11-23 20:33:44,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:33:44,054 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2019-11-23 20:33:44,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:33:44,057 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 128 [2019-11-23 20:33:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:33:44,058 INFO L225 Difference]: With dead ends: 225 [2019-11-23 20:33:44,059 INFO L226 Difference]: Without dead ends: 137 [2019-11-23 20:33:44,059 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:33:44,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-23 20:33:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2019-11-23 20:33:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:33:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2019-11-23 20:33:44,074 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 128 [2019-11-23 20:33:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:33:44,075 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2019-11-23 20:33:44,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:33:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2019-11-23 20:33:44,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:33:44,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:33:44,076 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:33:44,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:33:44,281 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:33:44,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:33:44,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1296437681, now seen corresponding path program 17 times [2019-11-23 20:33:44,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:33:44,282 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119500057] [2019-11-23 20:33:44,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:33:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:33:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 662 trivial. 0 not checked. [2019-11-23 20:33:44,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119500057] [2019-11-23 20:33:44,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371563601] [2019-11-23 20:33:44,572 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:18,867 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 20:34:18,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:18,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:34:18,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1062 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2019-11-23 20:34:18,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:18,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:34:18,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581828635] [2019-11-23 20:34:18,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:34:18,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:34:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:34:18,914 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 24 states. [2019-11-23 20:34:19,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:19,062 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2019-11-23 20:34:19,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:34:19,062 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2019-11-23 20:34:19,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:19,063 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:34:19,063 INFO L226 Difference]: Without dead ends: 142 [2019-11-23 20:34:19,063 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:34:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-23 20:34:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2019-11-23 20:34:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-23 20:34:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2019-11-23 20:34:19,070 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 133 [2019-11-23 20:34:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:19,070 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2019-11-23 20:34:19,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:34:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2019-11-23 20:34:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-23 20:34:19,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:19,071 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:19,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:19,272 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:19,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1501903681, now seen corresponding path program 18 times [2019-11-23 20:34:19,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:19,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198400859] [2019-11-23 20:34:19,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2019-11-23 20:34:19,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198400859] [2019-11-23 20:34:19,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584331425] [2019-11-23 20:34:19,573 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:35,587 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-11-23 20:34:35,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:35,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-23 20:34:35,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:35,602 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:34:35,602 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:35,609 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:35,609 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:35,609 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:34:36,092 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2019-11-23 20:34:36,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:36,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 42 [2019-11-23 20:34:36,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185620086] [2019-11-23 20:34:36,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:34:36,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:34:36,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1268, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:34:36,199 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 42 states. [2019-11-23 20:34:38,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:38,400 INFO L93 Difference]: Finished difference Result 248 states and 254 transitions. [2019-11-23 20:34:38,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-23 20:34:38,400 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 138 [2019-11-23 20:34:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:38,402 INFO L225 Difference]: With dead ends: 248 [2019-11-23 20:34:38,402 INFO L226 Difference]: Without dead ends: 154 [2019-11-23 20:34:38,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1369, Invalid=5437, Unknown=0, NotChecked=0, Total=6806 [2019-11-23 20:34:38,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-11-23 20:34:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2019-11-23 20:34:38,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:34:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2019-11-23 20:34:38,412 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2019-11-23 20:34:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:38,413 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2019-11-23 20:34:38,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:34:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2019-11-23 20:34:38,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:34:38,414 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:38,414 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:38,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:38,623 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:38,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:38,623 INFO L82 PathProgramCache]: Analyzing trace with hash -115514269, now seen corresponding path program 19 times [2019-11-23 20:34:38,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:38,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38560323] [2019-11-23 20:34:38,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2019-11-23 20:34:38,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38560323] [2019-11-23 20:34:38,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026059647] [2019-11-23 20:34:38,952 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:39,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:34:39,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1297 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2019-11-23 20:34:39,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:39,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:34:39,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489249162] [2019-11-23 20:34:39,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:34:39,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:39,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:34:39,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:34:39,077 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand 26 states. [2019-11-23 20:34:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:39,274 INFO L93 Difference]: Finished difference Result 257 states and 262 transitions. [2019-11-23 20:34:39,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:34:39,277 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 147 [2019-11-23 20:34:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:39,277 INFO L225 Difference]: With dead ends: 257 [2019-11-23 20:34:39,278 INFO L226 Difference]: Without dead ends: 156 [2019-11-23 20:34:39,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:34:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-23 20:34:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2019-11-23 20:34:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-23 20:34:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2019-11-23 20:34:39,286 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 147 [2019-11-23 20:34:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:39,286 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2019-11-23 20:34:39,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:34:39,287 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2019-11-23 20:34:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-23 20:34:39,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:39,288 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:39,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:39,489 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -878686343, now seen corresponding path program 20 times [2019-11-23 20:34:39,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:39,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482367887] [2019-11-23 20:34:39,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2019-11-23 20:34:39,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482367887] [2019-11-23 20:34:39,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218841965] [2019-11-23 20:34:39,899 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:40,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:34:40,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:40,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:34:40,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2019-11-23 20:34:40,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:40,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:34:40,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542727351] [2019-11-23 20:34:40,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:34:40,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:34:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:34:40,047 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 27 states. [2019-11-23 20:34:40,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:40,257 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2019-11-23 20:34:40,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:34:40,257 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 152 [2019-11-23 20:34:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:40,258 INFO L225 Difference]: With dead ends: 265 [2019-11-23 20:34:40,258 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:34:40,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:34:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:34:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2019-11-23 20:34:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-23 20:34:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2019-11-23 20:34:40,267 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 152 [2019-11-23 20:34:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:40,267 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2019-11-23 20:34:40,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:34:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2019-11-23 20:34:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:34:40,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:40,268 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:40,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:40,473 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash -236153121, now seen corresponding path program 21 times [2019-11-23 20:34:40,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:40,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379198502] [2019-11-23 20:34:40,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-23 20:34:40,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379198502] [2019-11-23 20:34:40,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870068841] [2019-11-23 20:34:40,843 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:48,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 20:34:48,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:48,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-23 20:34:48,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:48,976 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:34:48,976 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:48,989 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:48,989 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:48,989 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:34:49,021 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2019-11-23 20:34:49,022 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:34:49,031 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:34:49,032 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:34:49,032 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:53, output treesize:14 [2019-11-23 20:34:49,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:34:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1526 backedges. 0 proven. 558 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2019-11-23 20:34:50,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:50,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 47 [2019-11-23 20:34:50,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764391529] [2019-11-23 20:34:50,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:34:50,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:50,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:34:50,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:34:50,111 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand 47 states. [2019-11-23 20:34:52,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:52,825 INFO L93 Difference]: Finished difference Result 280 states and 286 transitions. [2019-11-23 20:34:52,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:34:52,825 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 157 [2019-11-23 20:34:52,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:52,826 INFO L225 Difference]: With dead ends: 280 [2019-11-23 20:34:52,826 INFO L226 Difference]: Without dead ends: 173 [2019-11-23 20:34:52,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1709, Invalid=6847, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 20:34:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-23 20:34:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2019-11-23 20:34:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-11-23 20:34:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2019-11-23 20:34:52,837 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 157 [2019-11-23 20:34:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:52,838 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2019-11-23 20:34:52,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:34:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2019-11-23 20:34:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:34:52,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:52,839 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:53,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:53,040 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:53,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1286028493, now seen corresponding path program 22 times [2019-11-23 20:34:53,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:53,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417300162] [2019-11-23 20:34:53,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:53,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-11-23 20:34:53,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417300162] [2019-11-23 20:34:53,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856381042] [2019-11-23 20:34:53,381 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:53,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:34:53,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:34:53,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:34:53,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:34:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-11-23 20:34:53,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:34:53,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:34:53,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492969241] [2019-11-23 20:34:53,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:34:53,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:34:53,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:34:53,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:34:53,515 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 29 states. [2019-11-23 20:34:53,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:34:53,736 INFO L93 Difference]: Finished difference Result 289 states and 294 transitions. [2019-11-23 20:34:53,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:34:53,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 166 [2019-11-23 20:34:53,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:34:53,737 INFO L225 Difference]: With dead ends: 289 [2019-11-23 20:34:53,737 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 20:34:53,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:34:53,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 20:34:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2019-11-23 20:34:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:34:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 174 transitions. [2019-11-23 20:34:53,746 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 174 transitions. Word has length 166 [2019-11-23 20:34:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:34:53,747 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 174 transitions. [2019-11-23 20:34:53,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:34:53,747 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 174 transitions. [2019-11-23 20:34:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:34:53,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:34:53,748 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:34:53,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:34:53,952 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:34:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:34:53,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2071358319, now seen corresponding path program 23 times [2019-11-23 20:34:53,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:34:53,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720362729] [2019-11-23 20:34:53,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:34:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:34:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1129 trivial. 0 not checked. [2019-11-23 20:34:54,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720362729] [2019-11-23 20:34:54,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267551408] [2019-11-23 20:34:54,339 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true