/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-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:37:29,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:37:29,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:37:29,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:37:29,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:37:29,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:37:29,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:37:29,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:37:29,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:37:29,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:37:29,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:37:29,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:37:29,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:37:29,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:37:29,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:37:29,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:37:29,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:37:29,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:37:29,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:37:29,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:37:29,451 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:37:29,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:37:29,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:37:29,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:37:29,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:37:29,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:37:29,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:37:29,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:37:29,466 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 20:37:29,480 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:37:29,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:37:29,482 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:37:29,482 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:37:29,482 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:37:29,483 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:37:29,483 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:37:29,483 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:37:29,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:37:29,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:37:29,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:37:29,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:37:29,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:37:29,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:37:29,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:37:29,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:37:29,485 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:37:29,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:37:29,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:37:29,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:37:29,486 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:37:29,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:37:29,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:37:29,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:37:29,487 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:37:29,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:37:29,487 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:37:29,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:37:29,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:37:29,488 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:37:29,792 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:37:29,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:37:29,817 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:37:29,821 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:37:29,821 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:37:29,822 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-23 20:37:29,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f0f75d7/c93f1fb4bf794dd6a1d84738a6e74d15/FLAGf3f86c973 [2019-11-23 20:37:30,369 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:37:30,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2019-11-23 20:37:30,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f0f75d7/c93f1fb4bf794dd6a1d84738a6e74d15/FLAGf3f86c973 [2019-11-23 20:37:30,759 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29f0f75d7/c93f1fb4bf794dd6a1d84738a6e74d15 [2019-11-23 20:37:30,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:37:30,772 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:37:30,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:30,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:37:30,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:37:30,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:30" (1/1) ... [2019-11-23 20:37:30,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53f75d78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:30, skipping insertion in model container [2019-11-23 20:37:30,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:30" (1/1) ... [2019-11-23 20:37:30,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:37:30,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:37:30,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:30,969 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:37:30,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:37:31,004 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:37:31,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31 WrapperNode [2019-11-23 20:37:31,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:37:31,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:31,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:37:31,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:37:31,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,125 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:37:31,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:37:31,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:37:31,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:37:31,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,142 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,152 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (1/1) ... [2019-11-23 20:37:31,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:37:31,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:37:31,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:37:31,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:37:31,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (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 20:37:31,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:37:31,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:37:31,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:37:31,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:37:31,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:37:31,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:37:31,470 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:37:31,471 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:37:31,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:31 BoogieIcfgContainer [2019-11-23 20:37:31,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:37:31,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:37:31,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:37:31,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:37:31,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:30" (1/3) ... [2019-11-23 20:37:31,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a988fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:31, skipping insertion in model container [2019-11-23 20:37:31,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:31" (2/3) ... [2019-11-23 20:37:31,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a988fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:31, skipping insertion in model container [2019-11-23 20:37:31,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:31" (3/3) ... [2019-11-23 20:37:31,481 INFO L109 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2019-11-23 20:37:31,494 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:37:31,502 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:37:31,514 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:37:31,542 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:37:31,542 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:37:31,543 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:37:31,543 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:37:31,543 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:37:31,543 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:37:31,543 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:37:31,543 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:37:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:37:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:37:31,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:31,569 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:31,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:31,574 INFO L82 PathProgramCache]: Analyzing trace with hash 531796522, now seen corresponding path program 1 times [2019-11-23 20:37:31,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:31,583 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302868372] [2019-11-23 20:37:31,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:31,708 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 20:37:31,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302868372] [2019-11-23 20:37:31,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:37:31,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:37:31,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824311594] [2019-11-23 20:37:31,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:37:31,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:31,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:37:31,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:37:31,733 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-23 20:37:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:31,751 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-23 20:37:31,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:37:31,752 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:37:31,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:31,760 INFO L225 Difference]: With dead ends: 29 [2019-11-23 20:37:31,760 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 20:37:31,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:37:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 20:37:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 20:37:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:37:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2019-11-23 20:37:31,802 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2019-11-23 20:37:31,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:31,803 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2019-11-23 20:37:31,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:37:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2019-11-23 20:37:31,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:37:31,804 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:31,804 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:31,805 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:31,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:31,805 INFO L82 PathProgramCache]: Analyzing trace with hash 216875861, now seen corresponding path program 1 times [2019-11-23 20:37:31,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:31,806 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752871160] [2019-11-23 20:37:31,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:31,857 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 20:37:31,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752871160] [2019-11-23 20:37:31,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:37:31,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:37:31,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046811461] [2019-11-23 20:37:31,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:37:31,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:31,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:37:31,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:37:31,862 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2019-11-23 20:37:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:31,955 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-11-23 20:37:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:37:31,957 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:37:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:31,958 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:37:31,958 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:37:31,959 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 20:37:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:37:31,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 14. [2019-11-23 20:37:31,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:37:31,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-23 20:37:31,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2019-11-23 20:37:31,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:31,968 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-23 20:37:31,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:37:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-23 20:37:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:37:31,969 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:31,969 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:31,970 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:31,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:31,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1819905507, now seen corresponding path program 1 times [2019-11-23 20:37:31,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:31,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057370197] [2019-11-23 20:37:31,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:32,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057370197] [2019-11-23 20:37:32,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797029599] [2019-11-23 20:37:32,043 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 20:37:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:32,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:37:32,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:32,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:32,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:37:32,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839939226] [2019-11-23 20:37:32,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:37:32,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:32,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:37:32,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:37:32,165 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 5 states. [2019-11-23 20:37:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:32,225 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-11-23 20:37:32,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:37:32,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-23 20:37:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:32,227 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:37:32,228 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:37:32,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 20:37:32,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:37:32,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 17. [2019-11-23 20:37:32,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:37:32,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-23 20:37:32,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2019-11-23 20:37:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:32,234 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-23 20:37:32,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:37:32,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2019-11-23 20:37:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:37:32,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:32,235 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:32,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:32,440 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash -275681707, now seen corresponding path program 2 times [2019-11-23 20:37:32,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:32,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617926563] [2019-11-23 20:37:32,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:32,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617926563] [2019-11-23 20:37:32,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91617144] [2019-11-23 20:37:32,540 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 20:37:32,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:32,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:32,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:37:32,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:32,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:32,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:37:32,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928058146] [2019-11-23 20:37:32,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:37:32,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:32,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:37:32,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:32,609 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 6 states. [2019-11-23 20:37:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:32,691 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-11-23 20:37:32,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:37:32,692 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-23 20:37:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:32,693 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:37:32,693 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:37:32,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:37:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:37:32,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 20. [2019-11-23 20:37:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:37:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 20:37:32,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2019-11-23 20:37:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:32,702 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 20:37:32,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:37:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 20:37:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:37:32,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:32,704 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:32,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:32,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash 300836637, now seen corresponding path program 3 times [2019-11-23 20:37:32,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:32,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063677967] [2019-11-23 20:37:32,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:32,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063677967] [2019-11-23 20:37:32,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757934930] [2019-11-23 20:37:32,999 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 20:37:33,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:37:33,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:33,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:37:33,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:33,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:33,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:37:33,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31559053] [2019-11-23 20:37:33,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:37:33,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:37:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:33,086 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 7 states. [2019-11-23 20:37:33,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:33,177 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2019-11-23 20:37:33,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:37:33,177 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-23 20:37:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:33,178 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:37:33,179 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:37:33,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:37:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:37:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 23. [2019-11-23 20:37:33,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:37:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-23 20:37:33,189 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 17 [2019-11-23 20:37:33,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:33,189 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-23 20:37:33,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:37:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2019-11-23 20:37:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:37:33,190 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:33,190 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:33,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:33,391 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:33,392 INFO L82 PathProgramCache]: Analyzing trace with hash -215393963, now seen corresponding path program 4 times [2019-11-23 20:37:33,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:33,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146639397] [2019-11-23 20:37:33,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:33,514 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146639397] [2019-11-23 20:37:33,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21053879] [2019-11-23 20:37:33,515 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 20:37:33,554 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:33,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:33,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:37:33,557 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:33,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:33,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:37:33,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224056140] [2019-11-23 20:37:33,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:37:33,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:33,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:37:33,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:37:33,571 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 8 states. [2019-11-23 20:37:33,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:33,657 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-23 20:37:33,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:37:33,658 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-23 20:37:33,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:33,659 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:37:33,659 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:37:33,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:37:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:37:33,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 26. [2019-11-23 20:37:33,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:37:33,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 20:37:33,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 20 [2019-11-23 20:37:33,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:33,667 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 20:37:33,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:37:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 20:37:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:37:33,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:33,668 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:33,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:33,873 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1036688413, now seen corresponding path program 5 times [2019-11-23 20:37:33,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:33,875 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674032896] [2019-11-23 20:37:33,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:33,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674032896] [2019-11-23 20:37:33,957 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761817448] [2019-11-23 20:37:33,957 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 20:37:34,035 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:37:34,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:34,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:37:34,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:34,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:34,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:37:34,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256032284] [2019-11-23 20:37:34,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:37:34,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:34,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:37:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:34,059 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 9 states. [2019-11-23 20:37:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:34,154 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2019-11-23 20:37:34,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:37:34,155 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2019-11-23 20:37:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:34,156 INFO L225 Difference]: With dead ends: 81 [2019-11-23 20:37:34,156 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:37:34,159 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:37:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:37:34,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 29. [2019-11-23 20:37:34,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:37:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2019-11-23 20:37:34,170 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 23 [2019-11-23 20:37:34,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:34,171 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2019-11-23 20:37:34,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:37:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2019-11-23 20:37:34,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:37:34,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:34,172 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:34,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:34,377 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:34,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:34,378 INFO L82 PathProgramCache]: Analyzing trace with hash 31786069, now seen corresponding path program 6 times [2019-11-23 20:37:34,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:34,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385265874] [2019-11-23 20:37:34,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:34,500 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385265874] [2019-11-23 20:37:34,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179133398] [2019-11-23 20:37:34,501 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 20:37:34,583 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:37:34,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:34,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:37:34,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:34,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:34,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:37:34,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939886149] [2019-11-23 20:37:34,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:37:34,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:37:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:34,603 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 10 states. [2019-11-23 20:37:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:34,715 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2019-11-23 20:37:34,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:37:34,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-11-23 20:37:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:34,716 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:37:34,716 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:37:34,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:37:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:37:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 32. [2019-11-23 20:37:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:37:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-23 20:37:34,729 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 26 [2019-11-23 20:37:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:34,730 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-23 20:37:34,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:37:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-23 20:37:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:37:34,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:34,731 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:34,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:34,937 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:34,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1091890915, now seen corresponding path program 7 times [2019-11-23 20:37:34,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:34,938 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421003143] [2019-11-23 20:37:34,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:35,047 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421003143] [2019-11-23 20:37:35,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702468025] [2019-11-23 20:37:35,048 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 20:37:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:35,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:37:35,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:35,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:35,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:37:35,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913117199] [2019-11-23 20:37:35,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:37:35,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:35,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:37:35,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:37:35,136 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 11 states. [2019-11-23 20:37:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:35,258 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2019-11-23 20:37:35,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:37:35,258 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-11-23 20:37:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:35,259 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:37:35,260 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:37:35,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 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 20:37:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:37:35,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 35. [2019-11-23 20:37:35,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:37:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2019-11-23 20:37:35,272 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2019-11-23 20:37:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:35,272 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2019-11-23 20:37:35,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:37:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2019-11-23 20:37:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:37:35,273 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:35,273 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:35,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:35,474 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1577816235, now seen corresponding path program 8 times [2019-11-23 20:37:35,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:35,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91633886] [2019-11-23 20:37:35,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:35,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91633886] [2019-11-23 20:37:35,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822049843] [2019-11-23 20:37:35,604 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 20:37:35,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:35,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:35,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:37:35,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:35,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:35,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:37:35,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321109487] [2019-11-23 20:37:35,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:37:35,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:37:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:37:35,683 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2019-11-23 20:37:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:35,796 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2019-11-23 20:37:35,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:37:35,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2019-11-23 20:37:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:35,799 INFO L225 Difference]: With dead ends: 111 [2019-11-23 20:37:35,799 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:37:35,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 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 20:37:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:37:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 38. [2019-11-23 20:37:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:37:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2019-11-23 20:37:35,805 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 32 [2019-11-23 20:37:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:35,805 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2019-11-23 20:37:35,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:37:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2019-11-23 20:37:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:37:35,806 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:35,806 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:36,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:36,017 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:36,018 INFO L82 PathProgramCache]: Analyzing trace with hash 555730461, now seen corresponding path program 9 times [2019-11-23 20:37:36,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:36,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244837703] [2019-11-23 20:37:36,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:36,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244837703] [2019-11-23 20:37:36,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887500834] [2019-11-23 20:37:36,129 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 20:37:36,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:37:36,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:36,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:37:36,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:36,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:36,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:37:36,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506890468] [2019-11-23 20:37:36,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:37:36,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:37:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:36,512 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand 13 states. [2019-11-23 20:37:36,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:36,635 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2019-11-23 20:37:36,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:37:36,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2019-11-23 20:37:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:36,636 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:37:36,637 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:37:36,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:37:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:37:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 41. [2019-11-23 20:37:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:37:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2019-11-23 20:37:36,642 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 35 [2019-11-23 20:37:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:36,642 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2019-11-23 20:37:36,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:37:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2019-11-23 20:37:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:37:36,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:36,654 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:36,854 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:36,855 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:36,855 INFO L82 PathProgramCache]: Analyzing trace with hash -175662507, now seen corresponding path program 10 times [2019-11-23 20:37:36,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:36,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091388576] [2019-11-23 20:37:36,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:36,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091388576] [2019-11-23 20:37:36,987 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629466465] [2019-11-23 20:37:36,987 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 20:37:37,031 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:37,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:37,032 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:37:37,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:37,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:37,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:37:37,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566434911] [2019-11-23 20:37:37,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:37:37,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:37,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:37:37,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:37:37,061 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 14 states. [2019-11-23 20:37:37,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:37,185 INFO L93 Difference]: Finished difference Result 131 states and 158 transitions. [2019-11-23 20:37:37,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:37:37,186 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2019-11-23 20:37:37,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:37,187 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:37:37,187 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:37:37,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 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 20:37:37,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:37:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 44. [2019-11-23 20:37:37,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:37:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2019-11-23 20:37:37,194 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 38 [2019-11-23 20:37:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:37,195 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2019-11-23 20:37:37,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:37:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2019-11-23 20:37:37,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:37:37,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:37,196 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:37,405 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:37,405 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:37,406 INFO L82 PathProgramCache]: Analyzing trace with hash -734479587, now seen corresponding path program 11 times [2019-11-23 20:37:37,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:37,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4552199] [2019-11-23 20:37:37,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:37,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4552199] [2019-11-23 20:37:37,565 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114259801] [2019-11-23 20:37:37,565 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 20:37:38,018 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:37:38,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:38,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:37:38,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:38,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:38,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:37:38,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399371100] [2019-11-23 20:37:38,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:37:38,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:38,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:37:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:37:38,075 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand 15 states. [2019-11-23 20:37:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:38,206 INFO L93 Difference]: Finished difference Result 141 states and 170 transitions. [2019-11-23 20:37:38,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:37:38,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2019-11-23 20:37:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:38,208 INFO L225 Difference]: With dead ends: 141 [2019-11-23 20:37:38,208 INFO L226 Difference]: Without dead ends: 133 [2019-11-23 20:37:38,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:37:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-23 20:37:38,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 47. [2019-11-23 20:37:38,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:37:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2019-11-23 20:37:38,214 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 41 [2019-11-23 20:37:38,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:38,214 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2019-11-23 20:37:38,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:37:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2019-11-23 20:37:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:37:38,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:38,216 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:38,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:38,420 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1160870571, now seen corresponding path program 12 times [2019-11-23 20:37:38,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:38,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109226137] [2019-11-23 20:37:38,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:38,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109226137] [2019-11-23 20:37:38,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104702834] [2019-11-23 20:37:38,589 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 20:37:39,824 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:37:39,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:39,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:37:39,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:39,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:39,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:37:39,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921838147] [2019-11-23 20:37:39,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:37:39,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:37:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:37:39,884 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 16 states. [2019-11-23 20:37:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:40,010 INFO L93 Difference]: Finished difference Result 151 states and 182 transitions. [2019-11-23 20:37:40,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:37:40,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2019-11-23 20:37:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:40,012 INFO L225 Difference]: With dead ends: 151 [2019-11-23 20:37:40,012 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:37:40,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:37:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:37:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 50. [2019-11-23 20:37:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:37:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2019-11-23 20:37:40,018 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 44 [2019-11-23 20:37:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:40,018 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2019-11-23 20:37:40,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:37:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2019-11-23 20:37:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:37:40,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:40,019 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:40,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:40,224 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:40,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:40,225 INFO L82 PathProgramCache]: Analyzing trace with hash 738586653, now seen corresponding path program 13 times [2019-11-23 20:37:40,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:40,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021518291] [2019-11-23 20:37:40,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:40,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021518291] [2019-11-23 20:37:40,396 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672804378] [2019-11-23 20:37:40,396 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 20:37:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:40,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:37:40,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:40,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:40,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:37:40,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974347410] [2019-11-23 20:37:40,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:37:40,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:40,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:37:40,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:37:40,471 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand 17 states. [2019-11-23 20:37:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:40,620 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2019-11-23 20:37:40,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:37:40,620 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2019-11-23 20:37:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:40,622 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:37:40,622 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 20:37:40,623 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 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 20:37:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 20:37:40,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 53. [2019-11-23 20:37:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:37:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2019-11-23 20:37:40,628 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 47 [2019-11-23 20:37:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:40,629 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2019-11-23 20:37:40,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:37:40,629 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2019-11-23 20:37:40,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:37:40,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:40,630 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:40,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:40,834 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:40,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:40,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1274622037, now seen corresponding path program 14 times [2019-11-23 20:37:40,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:40,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805650454] [2019-11-23 20:37:40,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:41,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805650454] [2019-11-23 20:37:41,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127937535] [2019-11-23 20:37:41,020 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 20:37:41,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:37:41,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:41,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:37:41,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:41,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:41,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:37:41,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657225633] [2019-11-23 20:37:41,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:37:41,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:41,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:37:41,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:37:41,111 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand 18 states. [2019-11-23 20:37:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:41,258 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2019-11-23 20:37:41,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:37:41,259 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2019-11-23 20:37:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:41,260 INFO L225 Difference]: With dead ends: 171 [2019-11-23 20:37:41,260 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:37:41,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 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 20:37:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:37:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 56. [2019-11-23 20:37:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:37:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2019-11-23 20:37:41,268 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 50 [2019-11-23 20:37:41,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:41,268 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2019-11-23 20:37:41,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:37:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2019-11-23 20:37:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:37:41,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:41,269 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:41,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:41,473 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1616340253, now seen corresponding path program 15 times [2019-11-23 20:37:41,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:41,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243398467] [2019-11-23 20:37:41,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:41,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243398467] [2019-11-23 20:37:41,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321398501] [2019-11-23 20:37:41,657 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 20:37:43,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:37:43,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:43,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:37:43,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:43,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:43,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:37:43,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197736928] [2019-11-23 20:37:43,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:37:43,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:43,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:37:43,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:37:43,171 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand 19 states. [2019-11-23 20:37:43,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:43,361 INFO L93 Difference]: Finished difference Result 181 states and 218 transitions. [2019-11-23 20:37:43,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:37:43,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 53 [2019-11-23 20:37:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:43,363 INFO L225 Difference]: With dead ends: 181 [2019-11-23 20:37:43,363 INFO L226 Difference]: Without dead ends: 173 [2019-11-23 20:37:43,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:37:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-23 20:37:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 59. [2019-11-23 20:37:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:37:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2019-11-23 20:37:43,376 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 53 [2019-11-23 20:37:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:43,377 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2019-11-23 20:37:43,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:37:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2019-11-23 20:37:43,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:37:43,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:43,378 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:43,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:43,580 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1623745707, now seen corresponding path program 16 times [2019-11-23 20:37:43,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:43,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261374011] [2019-11-23 20:37:43,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:43,780 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:43,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261374011] [2019-11-23 20:37:43,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186122932] [2019-11-23 20:37:43,781 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 20:37:43,830 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:37:43,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:43,837 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:37:43,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:43,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:43,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:37:43,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95252506] [2019-11-23 20:37:43,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:37:43,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:43,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:37:43,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:37:43,866 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand 20 states. [2019-11-23 20:37:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:44,084 INFO L93 Difference]: Finished difference Result 191 states and 230 transitions. [2019-11-23 20:37:44,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:37:44,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2019-11-23 20:37:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:44,087 INFO L225 Difference]: With dead ends: 191 [2019-11-23 20:37:44,087 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 20:37:44,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:37:44,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 20:37:44,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 62. [2019-11-23 20:37:44,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:37:44,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2019-11-23 20:37:44,092 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 56 [2019-11-23 20:37:44,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:44,093 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2019-11-23 20:37:44,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:37:44,093 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2019-11-23 20:37:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:37:44,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:44,094 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:44,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:44,301 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1929569763, now seen corresponding path program 17 times [2019-11-23 20:37:44,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:44,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762409062] [2019-11-23 20:37:44,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:44,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762409062] [2019-11-23 20:37:44,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131720006] [2019-11-23 20:37:44,547 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 20:37:55,116 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:37:55,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:55,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:37:55,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:55,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:55,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:37:55,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377437144] [2019-11-23 20:37:55,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:37:55,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:55,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:37:55,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:55,159 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand 21 states. [2019-11-23 20:37:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:55,338 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2019-11-23 20:37:55,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:37:55,338 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2019-11-23 20:37:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:55,339 INFO L225 Difference]: With dead ends: 201 [2019-11-23 20:37:55,339 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 20:37:55,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:37:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 20:37:55,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 65. [2019-11-23 20:37:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:37:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2019-11-23 20:37:55,345 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 59 [2019-11-23 20:37:55,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:55,345 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2019-11-23 20:37:55,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:37:55,345 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2019-11-23 20:37:55,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:37:55,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:55,346 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:55,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:55,546 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:55,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:55,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1186580053, now seen corresponding path program 18 times [2019-11-23 20:37:55,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:55,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211272226] [2019-11-23 20:37:55,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:55,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211272226] [2019-11-23 20:37:55,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223284791] [2019-11-23 20:37:55,768 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 20:37:58,924 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:37:58,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:37:58,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:37:58,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:58,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:58,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:37:58,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881074950] [2019-11-23 20:37:58,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:37:58,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:37:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:37:58,949 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand 22 states. [2019-11-23 20:37:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:59,128 INFO L93 Difference]: Finished difference Result 211 states and 254 transitions. [2019-11-23 20:37:59,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:37:59,128 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 62 [2019-11-23 20:37:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:59,131 INFO L225 Difference]: With dead ends: 211 [2019-11-23 20:37:59,131 INFO L226 Difference]: Without dead ends: 203 [2019-11-23 20:37:59,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:37:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-23 20:37:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 68. [2019-11-23 20:37:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:37:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2019-11-23 20:37:59,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 62 [2019-11-23 20:37:59,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:59,135 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2019-11-23 20:37:59,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:37:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2019-11-23 20:37:59,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:37:59,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:59,136 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:37:59,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:37:59,342 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:37:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:37:59,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1312354531, now seen corresponding path program 19 times [2019-11-23 20:37:59,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:37:59,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578224233] [2019-11-23 20:37:59,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:37:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:59,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578224233] [2019-11-23 20:37:59,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197746100] [2019-11-23 20:37:59,605 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 20:37:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:37:59,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:37:59,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:37:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:37:59,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:37:59,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:37:59,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835662906] [2019-11-23 20:37:59,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:37:59,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:37:59,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:37:59,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:37:59,684 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand 23 states. [2019-11-23 20:37:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:37:59,897 INFO L93 Difference]: Finished difference Result 221 states and 266 transitions. [2019-11-23 20:37:59,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:37:59,897 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 65 [2019-11-23 20:37:59,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:37:59,899 INFO L225 Difference]: With dead ends: 221 [2019-11-23 20:37:59,899 INFO L226 Difference]: Without dead ends: 213 [2019-11-23 20:37:59,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:37:59,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-11-23 20:37:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 71. [2019-11-23 20:37:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 20:37:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2019-11-23 20:37:59,903 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 65 [2019-11-23 20:37:59,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:37:59,904 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2019-11-23 20:37:59,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:37:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2019-11-23 20:37:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:37:59,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:37:59,905 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:00,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:00,105 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:00,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1890562389, now seen corresponding path program 20 times [2019-11-23 20:38:00,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:00,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656061941] [2019-11-23 20:38:00,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:00,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656061941] [2019-11-23 20:38:00,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636396883] [2019-11-23 20:38:00,353 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 20:38:00,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:00,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:00,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:38:00,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:00,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:00,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:38:00,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819221043] [2019-11-23 20:38:00,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:38:00,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:00,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:38:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:38:00,455 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 24 states. [2019-11-23 20:38:00,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:00,648 INFO L93 Difference]: Finished difference Result 231 states and 278 transitions. [2019-11-23 20:38:00,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:38:00,648 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2019-11-23 20:38:00,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:00,651 INFO L225 Difference]: With dead ends: 231 [2019-11-23 20:38:00,651 INFO L226 Difference]: Without dead ends: 223 [2019-11-23 20:38:00,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:38:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-11-23 20:38:00,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 74. [2019-11-23 20:38:00,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:38:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2019-11-23 20:38:00,656 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 68 [2019-11-23 20:38:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:00,656 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2019-11-23 20:38:00,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:38:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2019-11-23 20:38:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:38:00,657 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:00,657 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:00,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:00,861 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1299889123, now seen corresponding path program 21 times [2019-11-23 20:38:00,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:00,863 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510586361] [2019-11-23 20:38:00,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:01,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510586361] [2019-11-23 20:38:01,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914500349] [2019-11-23 20:38:01,230 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 20:38:14,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 20:38:14,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:14,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:38:14,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:14,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:14,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:38:14,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346457977] [2019-11-23 20:38:14,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:38:14,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:14,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:38:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:38:14,259 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand 25 states. [2019-11-23 20:38:14,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:14,495 INFO L93 Difference]: Finished difference Result 241 states and 290 transitions. [2019-11-23 20:38:14,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:38:14,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2019-11-23 20:38:14,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:14,497 INFO L225 Difference]: With dead ends: 241 [2019-11-23 20:38:14,497 INFO L226 Difference]: Without dead ends: 233 [2019-11-23 20:38:14,498 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:38:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2019-11-23 20:38:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 77. [2019-11-23 20:38:14,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:38:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2019-11-23 20:38:14,503 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 71 [2019-11-23 20:38:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:14,503 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2019-11-23 20:38:14,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:38:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2019-11-23 20:38:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:38:14,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:14,504 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:14,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:14,705 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -414622635, now seen corresponding path program 22 times [2019-11-23 20:38:14,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:14,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891907931] [2019-11-23 20:38:14,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:15,012 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:15,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891907931] [2019-11-23 20:38:15,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117214982] [2019-11-23 20:38:15,013 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 20:38:15,077 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:15,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:15,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:38:15,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:15,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:15,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:38:15,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419774592] [2019-11-23 20:38:15,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:38:15,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:38:15,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:38:15,115 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand 26 states. [2019-11-23 20:38:15,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:15,365 INFO L93 Difference]: Finished difference Result 251 states and 302 transitions. [2019-11-23 20:38:15,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:38:15,365 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 74 [2019-11-23 20:38:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:15,366 INFO L225 Difference]: With dead ends: 251 [2019-11-23 20:38:15,366 INFO L226 Difference]: Without dead ends: 243 [2019-11-23 20:38:15,367 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 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 20:38:15,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-11-23 20:38:15,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 80. [2019-11-23 20:38:15,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:38:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2019-11-23 20:38:15,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 74 [2019-11-23 20:38:15,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:15,372 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2019-11-23 20:38:15,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:38:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2019-11-23 20:38:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:38:15,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:15,373 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:15,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:15,576 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1460123933, now seen corresponding path program 23 times [2019-11-23 20:38:15,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:15,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458735698] [2019-11-23 20:38:15,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:38:15,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458735698] [2019-11-23 20:38:15,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415812678] [2019-11-23 20:38:15,922 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 20:39:18,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:39:18,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:18,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:39:18,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:18,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:18,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:39:18,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747238192] [2019-11-23 20:39:18,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:39:18,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:39:18,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:39:18,805 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand 27 states. [2019-11-23 20:39:19,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:19,080 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2019-11-23 20:39:19,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:39:19,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2019-11-23 20:39:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:19,082 INFO L225 Difference]: With dead ends: 261 [2019-11-23 20:39:19,082 INFO L226 Difference]: Without dead ends: 253 [2019-11-23 20:39:19,083 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:39:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2019-11-23 20:39:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 83. [2019-11-23 20:39:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:39:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2019-11-23 20:39:19,087 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 77 [2019-11-23 20:39:19,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:19,087 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2019-11-23 20:39:19,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:39:19,087 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2019-11-23 20:39:19,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:39:19,088 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:19,088 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:19,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:19,298 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 280414037, now seen corresponding path program 24 times [2019-11-23 20:39:19,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:19,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780202116] [2019-11-23 20:39:19,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:39:19,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780202116] [2019-11-23 20:39:19,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190238408] [2019-11-23 20:39:19,769 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