/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapsum4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:13:26,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:13:26,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:13:26,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:13:26,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:13:26,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:13:26,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:13:26,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:13:26,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:13:26,919 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:13:26,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:13:26,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:13:26,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:13:26,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:13:26,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:13:26,931 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:13:26,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:13:26,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:13:26,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:13:26,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:13:26,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:13:26,950 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:13:26,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:13:26,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:13:26,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:13:26,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:13:26,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:13:26,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:13:26,971 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 20:13:26,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:13:26,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:13:26,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:13:26,994 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:13:26,994 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:13:26,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:13:26,994 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:13:26,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:13:26,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:13:26,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:13:26,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:13:26,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:13:26,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:13:26,997 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:13:26,997 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:13:26,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:13:26,997 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:13:26,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:13:26,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:13:26,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:13:26,998 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:13:26,998 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:13:26,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:13:26,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:13:26,999 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:13:26,999 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:13:26,999 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:13:27,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:13:27,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:13:27,000 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:13:27,264 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:13:27,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:13:27,283 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:13:27,285 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:13:27,285 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:13:27,286 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum4.i [2019-11-23 20:13:27,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb439221/f094eaa174d349eab20ba91c850669f0/FLAGdc59b6435 [2019-11-23 20:13:27,866 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:13:27,867 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum4.i [2019-11-23 20:13:27,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb439221/f094eaa174d349eab20ba91c850669f0/FLAGdc59b6435 [2019-11-23 20:13:28,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4cb439221/f094eaa174d349eab20ba91c850669f0 [2019-11-23 20:13:28,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:13:28,301 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:13:28,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:28,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:13:28,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:13:28,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef44e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28, skipping insertion in model container [2019-11-23 20:13:28,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:13:28,336 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:13:28,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:28,562 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:13:28,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:28,603 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:13:28,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28 WrapperNode [2019-11-23 20:13:28,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:28,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:28,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:13:28,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:13:28,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:28,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:13:28,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:13:28,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:13:28,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (1/1) ... [2019-11-23 20:13:28,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:13:28,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:13:28,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:13:28,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:13:28,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (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 20:13:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:13:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:13:28,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:13:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:13:28,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:13:28,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:13:29,203 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:13:29,203 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:13:29,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:29 BoogieIcfgContainer [2019-11-23 20:13:29,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:13:29,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:13:29,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:13:29,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:13:29,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:13:28" (1/3) ... [2019-11-23 20:13:29,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5411a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:29, skipping insertion in model container [2019-11-23 20:13:29,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:28" (2/3) ... [2019-11-23 20:13:29,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5411a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:29, skipping insertion in model container [2019-11-23 20:13:29,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:29" (3/3) ... [2019-11-23 20:13:29,213 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2019-11-23 20:13:29,222 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:13:29,228 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:13:29,238 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:13:29,263 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:13:29,264 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:13:29,264 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:13:29,264 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:13:29,264 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:13:29,265 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:13:29,265 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:13:29,265 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:13:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-11-23 20:13:29,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:13:29,287 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:29,288 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:29,289 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:29,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2019-11-23 20:13:29,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:29,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073246165] [2019-11-23 20:13:29,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:29,460 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 20:13:29,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073246165] [2019-11-23 20:13:29,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:29,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:29,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945020961] [2019-11-23 20:13:29,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:29,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:29,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:29,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:29,493 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-11-23 20:13:29,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:29,554 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2019-11-23 20:13:29,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:29,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:13:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:29,569 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:13:29,569 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:13:29,573 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 20:13:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:13:29,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:13:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:13:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:13:29,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 20:13:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:29,621 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:13:29,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:13:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:13:29,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:29,622 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:29,623 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:29,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:29,623 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2019-11-23 20:13:29,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:29,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951906311] [2019-11-23 20:13:29,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:13:29,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951906311] [2019-11-23 20:13:29,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:29,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:29,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727662969] [2019-11-23 20:13:29,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:29,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:29,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:29,735 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2019-11-23 20:13:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:29,789 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:13:29,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:29,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 20:13:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:29,791 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:13:29,791 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:13:29,792 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 20:13:29,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:13:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-23 20:13:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:13:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 20:13:29,799 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-11-23 20:13:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:29,799 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 20:13:29,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:29,800 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 20:13:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:13:29,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:29,801 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:29,801 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2019-11-23 20:13:29,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:29,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420237025] [2019-11-23 20:13:29,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:29,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420237025] [2019-11-23 20:13:29,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:29,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:29,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238829449] [2019-11-23 20:13:29,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:29,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:29,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:29,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:29,886 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-23 20:13:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:29,923 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2019-11-23 20:13:29,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:29,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:13:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:29,926 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:13:29,926 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:13:29,926 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 20:13:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:13:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:13:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:13:29,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:13:29,934 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:13:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:29,935 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:13:29,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:13:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:13:29,936 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:29,936 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:29,937 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2019-11-23 20:13:29,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:29,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61614746] [2019-11-23 20:13:29,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:30,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61614746] [2019-11-23 20:13:30,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826772328] [2019-11-23 20:13:30,021 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 20:13:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:30,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:30,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:30,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:30,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:13:30,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240957154] [2019-11-23 20:13:30,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:13:30,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:30,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:13:30,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:13:30,129 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2019-11-23 20:13:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:30,168 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-11-23 20:13:30,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:13:30,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:13:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:30,170 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:13:30,170 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:13:30,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 20:13:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:13:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 20:13:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:13:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:13:30,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2019-11-23 20:13:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:30,184 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:13:30,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:13:30,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:13:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:13:30,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:30,187 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:30,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:30,391 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:30,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:30,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2019-11-23 20:13:30,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:30,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078418645] [2019-11-23 20:13:30,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:30,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078418645] [2019-11-23 20:13:30,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794969970] [2019-11-23 20:13:30,494 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 20:13:30,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:30,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:30,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:30,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:30,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:30,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:13:30,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135709086] [2019-11-23 20:13:30,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:13:30,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:30,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:13:30,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:30,613 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-11-23 20:13:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:30,702 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-11-23 20:13:30,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:13:30,703 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-11-23 20:13:30,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:30,704 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:13:30,704 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:13:30,706 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:13:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-11-23 20:13:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:13:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-11-23 20:13:30,717 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 29 [2019-11-23 20:13:30,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:30,718 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-11-23 20:13:30,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:13:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-11-23 20:13:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:13:30,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:30,719 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:30,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:30,920 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:30,921 INFO L82 PathProgramCache]: Analyzing trace with hash -137911400, now seen corresponding path program 3 times [2019-11-23 20:13:30,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:30,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996857222] [2019-11-23 20:13:30,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:31,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996857222] [2019-11-23 20:13:31,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505592392] [2019-11-23 20:13:31,031 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 20:13:31,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:13:31,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:31,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:13:31,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:13:31,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:31,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:13:31,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963756548] [2019-11-23 20:13:31,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:13:31,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:13:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:31,110 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2019-11-23 20:13:31,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:31,211 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-11-23 20:13:31,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:13:31,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-23 20:13:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:31,213 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:13:31,213 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:13:31,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:13:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2019-11-23 20:13:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:13:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-23 20:13:31,231 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 33 [2019-11-23 20:13:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:31,231 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-23 20:13:31,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:13:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-23 20:13:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:13:31,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:31,233 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:31,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:31,439 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1281406804, now seen corresponding path program 4 times [2019-11-23 20:13:31,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:31,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265997124] [2019-11-23 20:13:31,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:13:31,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265997124] [2019-11-23 20:13:31,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648454030] [2019-11-23 20:13:31,545 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:31,611 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:31,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:31,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:31,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:13:31,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:31,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:13:31,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825120196] [2019-11-23 20:13:31,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:13:31,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:13:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:13:31,659 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 10 states. [2019-11-23 20:13:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:31,810 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2019-11-23 20:13:31,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:13:31,811 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-11-23 20:13:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:31,812 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:13:31,812 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:13:31,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:13:31,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:13:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-11-23 20:13:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:13:31,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-23 20:13:31,827 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 41 [2019-11-23 20:13:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:31,828 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-23 20:13:31,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:13:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-23 20:13:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:13:31,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:31,831 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:32,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:32,037 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:32,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:32,037 INFO L82 PathProgramCache]: Analyzing trace with hash 719163408, now seen corresponding path program 5 times [2019-11-23 20:13:32,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:32,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888196097] [2019-11-23 20:13:32,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:32,180 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:13:32,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888196097] [2019-11-23 20:13:32,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154754767] [2019-11-23 20:13:32,181 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:32,258 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:13:32,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:32,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:13:32,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-11-23 20:13:32,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:32,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-23 20:13:32,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146719934] [2019-11-23 20:13:32,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:32,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:32,329 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 12 states. [2019-11-23 20:13:32,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:32,451 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2019-11-23 20:13:32,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:13:32,451 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:13:32,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:32,452 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:13:32,453 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:13:32,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:32,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:13:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-11-23 20:13:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:13:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:13:32,460 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 49 [2019-11-23 20:13:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:32,460 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:13:32,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:13:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:13:32,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:32,462 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:32,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:32,666 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:32,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash 25423308, now seen corresponding path program 6 times [2019-11-23 20:13:32,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:32,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357863614] [2019-11-23 20:13:32,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:13:32,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357863614] [2019-11-23 20:13:32,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528908329] [2019-11-23 20:13:32,795 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:32,879 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:13:32,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:32,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:32,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-11-23 20:13:32,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:32,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-23 20:13:32,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890858551] [2019-11-23 20:13:32,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:32,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:32,931 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 12 states. [2019-11-23 20:13:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:32,986 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2019-11-23 20:13:32,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:13:32,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-11-23 20:13:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:32,990 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:13:32,990 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:13:32,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:13:32,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-23 20:13:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:13:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2019-11-23 20:13:33,001 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 57 [2019-11-23 20:13:33,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:33,003 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2019-11-23 20:13:33,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2019-11-23 20:13:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:13:33,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:33,004 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:33,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:33,208 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:33,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 7 times [2019-11-23 20:13:33,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:33,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438110852] [2019-11-23 20:13:33,210 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:33,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438110852] [2019-11-23 20:13:33,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896766508] [2019-11-23 20:13:33,312 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:33,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:33,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:33,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:33,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:13:33,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975070818] [2019-11-23 20:13:33,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:13:33,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:33,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:13:33,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:13:33,415 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2019-11-23 20:13:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:33,466 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-23 20:13:33,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:13:33,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-11-23 20:13:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:33,467 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:13:33,468 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:13:33,470 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 20:13:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:13:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:13:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:13:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2019-11-23 20:13:33,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2019-11-23 20:13:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:33,482 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2019-11-23 20:13:33,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:13:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2019-11-23 20:13:33,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:13:33,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:33,483 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:33,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:33,684 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 8 times [2019-11-23 20:13:33,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:33,686 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608211572] [2019-11-23 20:13:33,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:33,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608211572] [2019-11-23 20:13:33,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935358448] [2019-11-23 20:13:33,827 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:33,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:33,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:33,893 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:33,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:33,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:13:33,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640931612] [2019-11-23 20:13:33,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:13:33,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:13:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:13:33,923 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 12 states. [2019-11-23 20:13:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:33,961 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2019-11-23 20:13:33,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:13:33,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2019-11-23 20:13:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:33,963 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:13:33,963 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:13:33,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 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 20:13:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:13:33,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:13:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:13:33,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:13:33,976 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 63 [2019-11-23 20:13:33,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:33,977 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:13:33,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:13:33,977 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:13:33,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:13:33,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:33,978 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:34,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:34,188 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1307453444, now seen corresponding path program 9 times [2019-11-23 20:13:34,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:34,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544831117] [2019-11-23 20:13:34,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:13:34,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544831117] [2019-11-23 20:13:34,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657141163] [2019-11-23 20:13:34,313 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:34,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:13:34,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:34,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:13:34,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2019-11-23 20:13:34,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:34,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:13:34,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982556207] [2019-11-23 20:13:34,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:13:34,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:13:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:13:34,425 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 16 states. [2019-11-23 20:13:34,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:34,489 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-23 20:13:34,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:13:34,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2019-11-23 20:13:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:34,490 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:13:34,490 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:13:34,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:13:34,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:13:34,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2019-11-23 20:13:34,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:13:34,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:13:34,497 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 65 [2019-11-23 20:13:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:34,497 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:13:34,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:13:34,498 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:13:34,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:13:34,498 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:34,498 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:34,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:34,709 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 10 times [2019-11-23 20:13:34,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:34,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085466755] [2019-11-23 20:13:34,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:34,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085466755] [2019-11-23 20:13:34,836 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351523949] [2019-11-23 20:13:34,836 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:34,903 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:34,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:34,904 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:13:34,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:34,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:34,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:13:34,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679378376] [2019-11-23 20:13:34,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:13:34,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:13:34,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:13:34,938 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2019-11-23 20:13:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:34,976 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2019-11-23 20:13:34,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:13:34,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2019-11-23 20:13:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:34,978 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:13:34,978 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:13:34,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 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 20:13:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:13:34,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:13:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:13:34,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:13:34,984 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2019-11-23 20:13:34,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:34,984 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:13:34,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:13:34,984 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:13:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:13:34,985 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:34,985 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:35,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:35,190 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:35,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 11 times [2019-11-23 20:13:35,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:35,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048019144] [2019-11-23 20:13:35,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:13:35,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048019144] [2019-11-23 20:13:35,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22193690] [2019-11-23 20:13:35,340 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:35,916 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:13:35,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:35,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:13:35,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:13:35,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:35,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:13:35,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587281264] [2019-11-23 20:13:35,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:13:35,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:13:35,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:13:35,997 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2019-11-23 20:13:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:36,129 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-23 20:13:36,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:13:36,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2019-11-23 20:13:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:36,130 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:13:36,130 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:13:36,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:13:36,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:13:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2019-11-23 20:13:36,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:13:36,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-11-23 20:13:36,136 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 71 [2019-11-23 20:13:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:36,136 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-11-23 20:13:36,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:13:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-11-23 20:13:36,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:13:36,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:36,137 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:36,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:36,346 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash -87813062, now seen corresponding path program 12 times [2019-11-23 20:13:36,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:36,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962960797] [2019-11-23 20:13:36,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:13:36,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962960797] [2019-11-23 20:13:36,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114977730] [2019-11-23 20:13:36,520 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:36,940 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:13:36,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:36,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:13:36,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-11-23 20:13:37,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:37,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:13:37,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335971637] [2019-11-23 20:13:37,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:13:37,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:37,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:13:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:13:37,018 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 20 states. [2019-11-23 20:13:37,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:37,099 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-23 20:13:37,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:13:37,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2019-11-23 20:13:37,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:37,100 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:13:37,100 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:13:37,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:13:37,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:13:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-11-23 20:13:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:13:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-23 20:13:37,105 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 79 [2019-11-23 20:13:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:37,105 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-23 20:13:37,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:13:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-23 20:13:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:13:37,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:37,106 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:37,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,310 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:37,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:37,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1378261878, now seen corresponding path program 13 times [2019-11-23 20:13:37,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:37,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526566804] [2019-11-23 20:13:37,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:37,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526566804] [2019-11-23 20:13:37,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061276954] [2019-11-23 20:13:37,478 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:37,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:13:37,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:37,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:37,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:13:37,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866162855] [2019-11-23 20:13:37,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:13:37,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:13:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:13:37,578 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 17 states. [2019-11-23 20:13:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:37,630 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-23 20:13:37,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:13:37,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 83 [2019-11-23 20:13:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:37,631 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:13:37,631 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:13:37,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 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 20:13:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:13:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:13:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:13:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:13:37,637 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 83 [2019-11-23 20:13:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:37,637 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:13:37,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:13:37,637 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:13:37,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:13:37,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:37,638 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:37,841 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:37,842 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1032577844, now seen corresponding path program 14 times [2019-11-23 20:13:37,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:37,843 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900161833] [2019-11-23 20:13:37,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:38,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900161833] [2019-11-23 20:13:38,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7965711] [2019-11-23 20:13:38,027 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,094 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:38,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:38,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:13:38,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:38,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:38,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:13:38,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350195917] [2019-11-23 20:13:38,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:13:38,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:13:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:13:38,114 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 18 states. [2019-11-23 20:13:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:38,164 INFO L93 Difference]: Finished difference Result 144 states and 152 transitions. [2019-11-23 20:13:38,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:13:38,165 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2019-11-23 20:13:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:38,165 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:13:38,166 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:13:38,166 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 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 20:13:38,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:13:38,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:13:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:13:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2019-11-23 20:13:38,170 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 85 [2019-11-23 20:13:38,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:38,172 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2019-11-23 20:13:38,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:13:38,172 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2019-11-23 20:13:38,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:13:38,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:38,173 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:38,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,376 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:38,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:38,377 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 15 times [2019-11-23 20:13:38,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:38,378 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56561673] [2019-11-23 20:13:38,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:13:38,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56561673] [2019-11-23 20:13:38,582 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789537406] [2019-11-23 20:13:38,583 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:38,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:13:38,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:38,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:13:38,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:13:38,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:38,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-23 20:13:38,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477295645] [2019-11-23 20:13:38,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:13:38,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:13:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:38,787 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 24 states. [2019-11-23 20:13:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:38,924 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2019-11-23 20:13:38,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:13:38,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 87 [2019-11-23 20:13:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:38,926 INFO L225 Difference]: With dead ends: 149 [2019-11-23 20:13:38,926 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:13:38,926 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:38,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:13:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-23 20:13:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:13:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-11-23 20:13:38,931 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 87 [2019-11-23 20:13:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:38,931 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-11-23 20:13:38,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:13:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-11-23 20:13:38,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:13:38,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:38,932 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:39,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,133 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:39,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash -400970066, now seen corresponding path program 16 times [2019-11-23 20:13:39,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:39,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914059068] [2019-11-23 20:13:39,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:13:39,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914059068] [2019-11-23 20:13:39,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544489084] [2019-11-23 20:13:39,340 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,407 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:39,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:39,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:13:39,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:13:39,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:39,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-11-23 20:13:39,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120693217] [2019-11-23 20:13:39,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:13:39,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:13:39,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:13:39,518 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 25 states. [2019-11-23 20:13:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:39,718 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2019-11-23 20:13:39,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:13:39,718 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 91 [2019-11-23 20:13:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:39,719 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:13:39,719 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:13:39,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:13:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:13:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2019-11-23 20:13:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:13:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-23 20:13:39,725 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2019-11-23 20:13:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:39,726 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-23 20:13:39,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:13:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-23 20:13:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:13:39,727 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:39,727 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:39,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:39,929 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash 169708650, now seen corresponding path program 17 times [2019-11-23 20:13:39,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:39,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699310956] [2019-11-23 20:13:39,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:13:40,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699310956] [2019-11-23 20:13:40,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506961088] [2019-11-23 20:13:40,155 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:40,967 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:13:40,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:40,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:40,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2019-11-23 20:13:41,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:41,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-11-23 20:13:41,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005555168] [2019-11-23 20:13:41,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:13:41,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:13:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:13:41,104 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 27 states. [2019-11-23 20:13:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:41,343 INFO L93 Difference]: Finished difference Result 175 states and 186 transitions. [2019-11-23 20:13:41,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:13:41,343 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 99 [2019-11-23 20:13:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:41,344 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:13:41,344 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:13:41,345 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:13:41,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:13:41,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2019-11-23 20:13:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-23 20:13:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2019-11-23 20:13:41,351 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 99 [2019-11-23 20:13:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:41,351 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2019-11-23 20:13:41,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:13:41,351 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2019-11-23 20:13:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:13:41,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:41,354 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:41,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:41,558 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:41,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:41,559 INFO L82 PathProgramCache]: Analyzing trace with hash -672846042, now seen corresponding path program 18 times [2019-11-23 20:13:41,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:41,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944062846] [2019-11-23 20:13:41,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2019-11-23 20:13:41,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944062846] [2019-11-23 20:13:41,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078340149] [2019-11-23 20:13:41,795 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 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 20:13:42,235 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:13:42,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:42,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:13:42,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 471 trivial. 0 not checked. [2019-11-23 20:13:42,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:42,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:13:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123531235] [2019-11-23 20:13:42,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:13:42,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:13:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:13:42,368 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 28 states. [2019-11-23 20:13:42,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:42,472 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2019-11-23 20:13:42,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:42,472 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 107 [2019-11-23 20:13:42,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:42,473 INFO L225 Difference]: With dead ends: 183 [2019-11-23 20:13:42,473 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:13:42,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:13:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:13:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-11-23 20:13:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:13:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2019-11-23 20:13:42,477 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2019-11-23 20:13:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:42,477 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2019-11-23 20:13:42,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:13:42,477 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2019-11-23 20:13:42,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:13:42,478 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:42,478 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:42,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:42,679 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:42,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:42,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1193239138, now seen corresponding path program 19 times [2019-11-23 20:13:42,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:42,679 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141536202] [2019-11-23 20:13:42,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:42,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141536202] [2019-11-23 20:13:42,902 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572103830] [2019-11-23 20:13:42,903 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 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 20:13:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:42,984 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:13:42,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:43,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:43,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:13:43,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405798843] [2019-11-23 20:13:43,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:13:43,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:43,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:13:43,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:13:43,030 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 23 states. [2019-11-23 20:13:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:43,107 INFO L93 Difference]: Finished difference Result 186 states and 194 transitions. [2019-11-23 20:13:43,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:13:43,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 111 [2019-11-23 20:13:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:43,109 INFO L225 Difference]: With dead ends: 186 [2019-11-23 20:13:43,109 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:13:43,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:13:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:13:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:13:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:13:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 118 transitions. [2019-11-23 20:13:43,117 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 118 transitions. Word has length 111 [2019-11-23 20:13:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:43,117 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 118 transitions. [2019-11-23 20:13:43,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:13:43,117 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 118 transitions. [2019-11-23 20:13:43,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:13:43,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:43,119 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:43,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:43,323 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1431322336, now seen corresponding path program 20 times [2019-11-23 20:13:43,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:43,324 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904106670] [2019-11-23 20:13:43,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:43,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904106670] [2019-11-23 20:13:43,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711097194] [2019-11-23 20:13:43,641 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 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 20:13:43,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:43,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:43,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:13:43,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:43,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:43,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:13:43,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913267877] [2019-11-23 20:13:43,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:13:43,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:13:43,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:13:43,849 INFO L87 Difference]: Start difference. First operand 114 states and 118 transitions. Second operand 24 states. [2019-11-23 20:13:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:43,948 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-23 20:13:43,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:13:43,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2019-11-23 20:13:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:43,950 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:13:43,950 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:13:43,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 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 20:13:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:13:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:13:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:13:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2019-11-23 20:13:43,956 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 113 [2019-11-23 20:13:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:43,957 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2019-11-23 20:13:43,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:13:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2019-11-23 20:13:43,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:13:43,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:43,958 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:44,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:44,162 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:44,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:44,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1805871198, now seen corresponding path program 21 times [2019-11-23 20:13:44,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:44,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382988847] [2019-11-23 20:13:44,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:13:44,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382988847] [2019-11-23 20:13:44,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487873859] [2019-11-23 20:13:44,421 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 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 20:13:44,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:13:44,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:44,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:13:44,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-23 20:13:44,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:44,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:13:44,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377456543] [2019-11-23 20:13:44,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:13:44,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:44,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:13:44,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:44,745 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand 32 states. [2019-11-23 20:13:44,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:44,988 INFO L93 Difference]: Finished difference Result 199 states and 210 transitions. [2019-11-23 20:13:44,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:13:44,988 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 115 [2019-11-23 20:13:44,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:44,989 INFO L225 Difference]: With dead ends: 199 [2019-11-23 20:13:44,989 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:13:44,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:13:44,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2019-11-23 20:13:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:13:44,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2019-11-23 20:13:44,996 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 115 [2019-11-23 20:13:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:44,998 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2019-11-23 20:13:44,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:13:44,998 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2019-11-23 20:13:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:13:44,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:44,999 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:45,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:45,204 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:45,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1756079898, now seen corresponding path program 22 times [2019-11-23 20:13:45,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:45,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94882191] [2019-11-23 20:13:45,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:45,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94882191] [2019-11-23 20:13:45,542 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110002700] [2019-11-23 20:13:45,542 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:13:45,674 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:45,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:45,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:13:45,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:45,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:45,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:13:45,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278313380] [2019-11-23 20:13:45,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:13:45,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:45,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:13:45,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:13:45,711 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand 26 states. [2019-11-23 20:13:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:45,881 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:13:45,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:13:45,882 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-23 20:13:45,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:45,883 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:13:45,883 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:13:45,884 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 123 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 20:13:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:13:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 20:13:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 20:13:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2019-11-23 20:13:45,891 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2019-11-23 20:13:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:45,891 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2019-11-23 20:13:45,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:13:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2019-11-23 20:13:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:13:45,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:45,894 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:46,099 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:46,099 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:46,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:46,100 INFO L82 PathProgramCache]: Analyzing trace with hash 366860504, now seen corresponding path program 23 times [2019-11-23 20:13:46,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:46,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534995167] [2019-11-23 20:13:46,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-11-23 20:13:46,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534995167] [2019-11-23 20:13:46,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438130744] [2019-11-23 20:13:46,460 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 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 20:13:50,735 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:13:50,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:50,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:50,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:50,892 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2019-11-23 20:13:50,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:50,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:13:50,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844886030] [2019-11-23 20:13:50,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:13:50,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:50,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:13:50,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:50,898 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 35 states. [2019-11-23 20:13:51,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:51,238 INFO L93 Difference]: Finished difference Result 215 states and 226 transitions. [2019-11-23 20:13:51,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:13:51,238 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 125 [2019-11-23 20:13:51,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:51,239 INFO L225 Difference]: With dead ends: 215 [2019-11-23 20:13:51,239 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:13:51,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:13:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2019-11-23 20:13:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-23 20:13:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2019-11-23 20:13:51,245 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2019-11-23 20:13:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:51,245 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2019-11-23 20:13:51,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:13:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2019-11-23 20:13:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:13:51,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:51,247 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:51,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:51,454 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash 613383828, now seen corresponding path program 24 times [2019-11-23 20:13:51,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:51,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044487248] [2019-11-23 20:13:51,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2019-11-23 20:13:51,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044487248] [2019-11-23 20:13:51,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600744438] [2019-11-23 20:13:51,876 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 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 20:13:52,547 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:13:52,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:52,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:13:52,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 868 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 819 trivial. 0 not checked. [2019-11-23 20:13:52,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:52,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-23 20:13:52,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443339814] [2019-11-23 20:13:52,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:13:52,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:52,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:13:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:52,715 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 35 states. [2019-11-23 20:13:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:52,844 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2019-11-23 20:13:52,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:13:52,845 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2019-11-23 20:13:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:52,846 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:13:52,846 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:13:52,847 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:13:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:13:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2019-11-23 20:13:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-23 20:13:52,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2019-11-23 20:13:52,851 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 133 [2019-11-23 20:13:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:52,852 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2019-11-23 20:13:52,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:13:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2019-11-23 20:13:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:13:52,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:52,853 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:53,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:53,058 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:53,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2095840464, now seen corresponding path program 25 times [2019-11-23 20:13:53,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:53,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201096170] [2019-11-23 20:13:53,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:53,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201096170] [2019-11-23 20:13:53,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649509375] [2019-11-23 20:13:53,556 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 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 20:13:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:53,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:13:53,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:53,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:53,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:13:53,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868646108] [2019-11-23 20:13:53,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:13:53,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:13:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:13:53,710 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 29 states. [2019-11-23 20:13:53,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:53,826 INFO L93 Difference]: Finished difference Result 226 states and 234 transitions. [2019-11-23 20:13:53,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:53,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2019-11-23 20:13:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:53,829 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:13:53,829 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:13:53,830 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:13:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:13:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-23 20:13:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:13:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:13:53,836 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 137 [2019-11-23 20:13:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:53,837 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:13:53,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:13:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:13:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:13:53,840 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:53,840 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:54,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:54,045 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:54,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:54,046 INFO L82 PathProgramCache]: Analyzing trace with hash -624080370, now seen corresponding path program 26 times [2019-11-23 20:13:54,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:54,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556425949] [2019-11-23 20:13:54,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:54,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556425949] [2019-11-23 20:13:54,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567065543] [2019-11-23 20:13:54,489 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 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 [2019-11-23 20:13:54,593 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:54,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:54,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:13:54,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:54,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:54,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:13:54,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040598420] [2019-11-23 20:13:54,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:13:54,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:13:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:13:54,650 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 30 states. [2019-11-23 20:13:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:54,741 INFO L93 Difference]: Finished difference Result 228 states and 236 transitions. [2019-11-23 20:13:54,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:13:54,742 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 139 [2019-11-23 20:13:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:54,743 INFO L225 Difference]: With dead ends: 228 [2019-11-23 20:13:54,743 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:13:54,744 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:13:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:13:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:13:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:13:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:13:54,748 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 139 [2019-11-23 20:13:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:54,749 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:13:54,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:13:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:13:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 20:13:54,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:54,750 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:54,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:54,954 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:54,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1167081420, now seen corresponding path program 27 times [2019-11-23 20:13:54,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:54,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232464519] [2019-11-23 20:13:54,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:55,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2019-11-23 20:13:55,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232464519] [2019-11-23 20:13:55,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578785333] [2019-11-23 20:13:55,393 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:55,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:13:55,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:55,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:13:55,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2019-11-23 20:13:55,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:55,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 39 [2019-11-23 20:13:55,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025197554] [2019-11-23 20:13:55,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:13:55,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:13:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:13:55,796 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 39 states. [2019-11-23 20:13:56,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:56,040 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2019-11-23 20:13:56,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:13:56,040 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 141 [2019-11-23 20:13:56,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:56,041 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:13:56,041 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:13:56,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=993, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:13:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:13:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2019-11-23 20:13:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:13:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2019-11-23 20:13:56,048 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 141 [2019-11-23 20:13:56,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:56,048 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2019-11-23 20:13:56,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:13:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2019-11-23 20:13:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:13:56,051 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:56,051 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:56,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:56,257 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1782074872, now seen corresponding path program 28 times [2019-11-23 20:13:56,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:56,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894318116] [2019-11-23 20:13:56,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:13:56,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894318116] [2019-11-23 20:13:56,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931562375] [2019-11-23 20:13:56,791 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:56,902 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:56,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:56,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:13:56,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:13:56,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:56,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:13:56,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52138334] [2019-11-23 20:13:56,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:13:56,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:56,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:13:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:56,950 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 32 states. [2019-11-23 20:13:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:57,046 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2019-11-23 20:13:57,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:13:57,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 20:13:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:57,048 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:13:57,048 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:13:57,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:13:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:13:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:13:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:13:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2019-11-23 20:13:57,053 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 145 [2019-11-23 20:13:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:57,054 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2019-11-23 20:13:57,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:13:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2019-11-23 20:13:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:13:57,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:57,055 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:57,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:57,259 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 29 times [2019-11-23 20:13:57,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:57,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503342168] [2019-11-23 20:13:57,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:57,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:13:57,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503342168] [2019-11-23 20:13:57,938 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995649082] [2019-11-23 20:13:57,938 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:13,409 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 20:14:13,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:13,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:14:13,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1165 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2019-11-23 20:14:13,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:13,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-23 20:14:13,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917623695] [2019-11-23 20:14:13,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:14:13,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:14:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:13,681 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand 42 states. [2019-11-23 20:14:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:13,995 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2019-11-23 20:14:13,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:14:13,996 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 147 [2019-11-23 20:14:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:13,997 INFO L225 Difference]: With dead ends: 247 [2019-11-23 20:14:13,997 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:14:13,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:14:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:14:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2019-11-23 20:14:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:14:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2019-11-23 20:14:14,004 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 147 [2019-11-23 20:14:14,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:14,004 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2019-11-23 20:14:14,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:14:14,004 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2019-11-23 20:14:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-11-23 20:14:14,005 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:14,005 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:14,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:14,213 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash 300865538, now seen corresponding path program 30 times [2019-11-23 20:14:14,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:14,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311673413] [2019-11-23 20:14:14,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:14:14,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311673413] [2019-11-23 20:14:14,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430284008] [2019-11-23 20:14:14,791 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:16,243 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:14:16,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:16,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:14:16,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2019-11-23 20:14:16,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:16,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 12] total 43 [2019-11-23 20:14:16,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331398781] [2019-11-23 20:14:16,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:14:16,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:14:16,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:14:16,445 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand 43 states. [2019-11-23 20:14:16,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:16,673 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2019-11-23 20:14:16,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:14:16,673 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 155 [2019-11-23 20:14:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:16,675 INFO L225 Difference]: With dead ends: 255 [2019-11-23 20:14:16,675 INFO L226 Difference]: Without dead ends: 162 [2019-11-23 20:14:16,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:14:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2019-11-23 20:14:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2019-11-23 20:14:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:14:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2019-11-23 20:14:16,681 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 155 [2019-11-23 20:14:16,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:16,682 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2019-11-23 20:14:16,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:14:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2019-11-23 20:14:16,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:14:16,683 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:16,683 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:16,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:16,889 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1309958206, now seen corresponding path program 31 times [2019-11-23 20:14:16,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:16,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713538458] [2019-11-23 20:14:16,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:17,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713538458] [2019-11-23 20:14:17,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495203815] [2019-11-23 20:14:17,438 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:17,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:14:17,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1361 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:17,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:17,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:14:17,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906316815] [2019-11-23 20:14:17,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:14:17,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:14:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:14:17,563 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 35 states. [2019-11-23 20:14:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:17,667 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-11-23 20:14:17,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:14:17,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 159 [2019-11-23 20:14:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:17,670 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:14:17,671 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:14:17,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:14:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:14:17,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:14:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:14:17,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2019-11-23 20:14:17,676 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 159 [2019-11-23 20:14:17,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:17,676 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2019-11-23 20:14:17,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:14:17,676 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2019-11-23 20:14:17,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:14:17,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:17,677 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:17,880 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:17,881 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2142172420, now seen corresponding path program 32 times [2019-11-23 20:14:17,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:17,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912051058] [2019-11-23 20:14:17,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:18,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912051058] [2019-11-23 20:14:18,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549551767] [2019-11-23 20:14:18,549 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:18,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:14:18,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:18,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:14:18,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:18,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:18,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:18,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:14:18,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658808844] [2019-11-23 20:14:18,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:14:18,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:18,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:14:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:18,710 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 36 states. [2019-11-23 20:14:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:18,825 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2019-11-23 20:14:18,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:14:18,826 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2019-11-23 20:14:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:18,827 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:14:18,827 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:14:18,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:14:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-11-23 20:14:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:14:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2019-11-23 20:14:18,832 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 161 [2019-11-23 20:14:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:18,832 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2019-11-23 20:14:18,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:14:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2019-11-23 20:14:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-11-23 20:14:18,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:18,834 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:19,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:19,038 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:19,039 INFO L82 PathProgramCache]: Analyzing trace with hash 370015802, now seen corresponding path program 33 times [2019-11-23 20:14:19,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:19,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943660591] [2019-11-23 20:14:19,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-23 20:14:19,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943660591] [2019-11-23 20:14:19,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041934803] [2019-11-23 20:14:19,726 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:20,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:14:20,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:20,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:20,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1389 trivial. 0 not checked. [2019-11-23 20:14:20,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:20,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2019-11-23 20:14:20,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149323453] [2019-11-23 20:14:20,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:14:20,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:20,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:14:20,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:14:20,300 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand 47 states. [2019-11-23 20:14:20,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:20,663 INFO L93 Difference]: Finished difference Result 271 states and 282 transitions. [2019-11-23 20:14:20,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:14:20,664 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2019-11-23 20:14:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:20,665 INFO L225 Difference]: With dead ends: 271 [2019-11-23 20:14:20,665 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:14:20,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:14:20,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:14:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2019-11-23 20:14:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:14:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2019-11-23 20:14:20,671 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2019-11-23 20:14:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:20,672 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2019-11-23 20:14:20,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:14:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2019-11-23 20:14:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 20:14:20,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:20,673 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:20,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:20,878 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:20,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:20,878 INFO L82 PathProgramCache]: Analyzing trace with hash -257617674, now seen corresponding path program 34 times [2019-11-23 20:14:20,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:20,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610226963] [2019-11-23 20:14:20,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2019-11-23 20:14:21,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610226963] [2019-11-23 20:14:21,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894273266] [2019-11-23 20:14:21,468 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:21,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:21,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:21,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:14:21,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1498 trivial. 0 not checked. [2019-11-23 20:14:21,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:21,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2019-11-23 20:14:21,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304753403] [2019-11-23 20:14:21,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:14:21,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:21,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:14:21,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:14:21,914 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand 49 states. [2019-11-23 20:14:22,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:22,278 INFO L93 Difference]: Finished difference Result 285 states and 296 transitions. [2019-11-23 20:14:22,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:14:22,278 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 171 [2019-11-23 20:14:22,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:22,280 INFO L225 Difference]: With dead ends: 285 [2019-11-23 20:14:22,280 INFO L226 Difference]: Without dead ends: 184 [2019-11-23 20:14:22,282 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:14:22,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-23 20:14:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2019-11-23 20:14:22,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:14:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2019-11-23 20:14:22,287 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 171 [2019-11-23 20:14:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:22,287 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2019-11-23 20:14:22,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:14:22,288 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2019-11-23 20:14:22,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 20:14:22,289 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:22,289 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:22,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:22,492 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1138775886, now seen corresponding path program 35 times [2019-11-23 20:14:22,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:22,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100363634] [2019-11-23 20:14:22,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-11-23 20:14:23,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100363634] [2019-11-23 20:14:23,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404283538] [2019-11-23 20:14:23,103 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true