/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_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:38:44,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:38:44,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:38:44,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:38:44,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:38:44,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:38:44,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:38:44,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:38:44,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:38:44,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:38:44,590 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:38:44,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:38:44,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:38:44,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:38:44,593 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:38:44,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:38:44,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:38:44,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:38:44,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:38:44,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:38:44,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:38:44,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:38:44,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:38:44,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:38:44,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:38:44,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:38:44,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:38:44,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:38:44,616 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 20:38:44,629 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:38:44,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:38:44,631 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:38:44,631 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:38:44,631 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:38:44,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:38:44,632 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:38:44,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:38:44,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:38:44,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:38:44,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:38:44,633 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:38:44,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:38:44,633 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:38:44,633 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:38:44,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:38:44,633 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:38:44,634 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:38:44,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:38:44,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:38:44,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:38:44,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:38:44,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:38:44,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:38:44,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:38:44,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:38:44,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:38:44,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:38:44,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:38:44,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:38:44,910 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:38:44,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:38:44,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:38:44,931 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:38:44,932 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:38:44,932 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2019-11-23 20:38:45,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7f7fd2c/45ca22dedffd47ccb5aae6b97de67cea/FLAG287047235 [2019-11-23 20:38:45,452 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:38:45,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2019-11-23 20:38:45,458 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7f7fd2c/45ca22dedffd47ccb5aae6b97de67cea/FLAG287047235 [2019-11-23 20:38:45,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de7f7fd2c/45ca22dedffd47ccb5aae6b97de67cea [2019-11-23 20:38:45,853 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:38:45,855 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:38:45,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:45,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:38:45,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:38:45,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:45" (1/1) ... [2019-11-23 20:38:45,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@544fd863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:45, skipping insertion in model container [2019-11-23 20:38:45,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:45" (1/1) ... [2019-11-23 20:38:45,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:38:45,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:38:46,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:46,063 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:38:46,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:38:46,102 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:38:46,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46 WrapperNode [2019-11-23 20:38:46,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:38:46,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:46,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:38:46,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:38:46,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,233 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:38:46,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:38:46,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:38:46,234 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:38:46,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,255 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (1/1) ... [2019-11-23 20:38:46,258 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:38:46,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:38:46,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:38:46,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:38:46,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (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 20:38:46,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:38:46,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:38:46,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:38:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:38:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:38:46,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:38:46,575 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:38:46,576 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:38:46,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:46 BoogieIcfgContainer [2019-11-23 20:38:46,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:38:46,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:38:46,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:38:46,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:38:46,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:45" (1/3) ... [2019-11-23 20:38:46,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1f33fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:46, skipping insertion in model container [2019-11-23 20:38:46,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:46" (2/3) ... [2019-11-23 20:38:46,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1f33fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:46, skipping insertion in model container [2019-11-23 20:38:46,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:46" (3/3) ... [2019-11-23 20:38:46,606 INFO L109 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2019-11-23 20:38:46,626 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:38:46,643 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:38:46,655 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:38:46,679 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:38:46,680 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:38:46,680 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:38:46,680 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:38:46,680 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:38:46,680 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:38:46,680 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:38:46,681 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:38:46,695 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-23 20:38:46,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:38:46,701 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:46,702 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:46,703 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:46,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:46,709 INFO L82 PathProgramCache]: Analyzing trace with hash 916381450, now seen corresponding path program 1 times [2019-11-23 20:38:46,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:46,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631992431] [2019-11-23 20:38:46,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:46,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:46,849 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 20:38:46,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631992431] [2019-11-23 20:38:46,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:46,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:38:46,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483454767] [2019-11-23 20:38:46,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:38:46,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:46,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:38:46,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:38:46,867 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-23 20:38:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:46,881 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2019-11-23 20:38:46,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:38:46,882 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:38:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:46,890 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:38:46,890 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:38:46,892 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 20:38:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:38:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-23 20:38:46,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:38:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2019-11-23 20:38:46,927 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 8 [2019-11-23 20:38:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:46,928 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2019-11-23 20:38:46,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:38:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2019-11-23 20:38:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:38:46,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:46,929 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:46,929 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:46,930 INFO L82 PathProgramCache]: Analyzing trace with hash 229281826, now seen corresponding path program 1 times [2019-11-23 20:38:46,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:46,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566513796] [2019-11-23 20:38:46,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:46,986 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 20:38:46,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566513796] [2019-11-23 20:38:46,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:38:46,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:38:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482610815] [2019-11-23 20:38:46,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:38:46,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:38:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:38:46,991 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand 3 states. [2019-11-23 20:38:47,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:47,115 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2019-11-23 20:38:47,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:38:47,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:38:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:47,119 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:38:47,119 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:38:47,121 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 20:38:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:38:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2019-11-23 20:38:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:38:47,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:38:47,131 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2019-11-23 20:38:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:47,131 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:38:47,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:38:47,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:38:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:38:47,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:47,133 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:47,133 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash -528137142, now seen corresponding path program 1 times [2019-11-23 20:38:47,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:47,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267069708] [2019-11-23 20:38:47,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:38:47,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267069708] [2019-11-23 20:38:47,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348313158] [2019-11-23 20:38:47,277 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 20:38:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:47,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:38:47,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:38:47,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:47,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:38:47,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95678830] [2019-11-23 20:38:47,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:38:47,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:38:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:38:47,393 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-11-23 20:38:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:47,477 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-11-23 20:38:47,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:38:47,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-11-23 20:38:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:47,479 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:38:47,479 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:38:47,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:38:47,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:38:47,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2019-11-23 20:38:47,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:38:47,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2019-11-23 20:38:47,486 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2019-11-23 20:38:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:47,486 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2019-11-23 20:38:47,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:38:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2019-11-23 20:38:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:38:47,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:47,488 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:47,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:47,696 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:47,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1069426978, now seen corresponding path program 2 times [2019-11-23 20:38:47,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:47,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711838150] [2019-11-23 20:38:47,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:38:47,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711838150] [2019-11-23 20:38:47,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347244167] [2019-11-23 20:38:47,814 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 20:38:47,880 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:47,880 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:47,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:38:47,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:38:47,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:47,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:38:47,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491093803] [2019-11-23 20:38:47,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:38:47,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:38:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:38:47,904 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 6 states. [2019-11-23 20:38:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:48,009 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2019-11-23 20:38:48,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:38:48,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-23 20:38:48,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:48,010 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:38:48,010 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:38:48,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 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 20:38:48,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:38:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2019-11-23 20:38:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:38:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-11-23 20:38:48,018 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 24 [2019-11-23 20:38:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:48,018 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-11-23 20:38:48,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:38:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-11-23 20:38:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:38:48,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:48,019 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:48,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:48,223 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash 879812426, now seen corresponding path program 3 times [2019-11-23 20:38:48,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:48,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604456549] [2019-11-23 20:38:48,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:38:48,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604456549] [2019-11-23 20:38:48,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584588440] [2019-11-23 20:38:48,306 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:38:48,354 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:38:48,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:48,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:38:48,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:48,405 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:38:48,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,409 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:48,409 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,409 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:8, output treesize:4 [2019-11-23 20:38:48,442 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:38:48,452 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 40 [2019-11-23 20:38:48,453 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,516 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:48,534 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2019-11-23 20:38:48,535 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,550 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 33 [2019-11-23 20:38:48,550 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,593 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:48,596 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 3 xjuncts. [2019-11-23 20:38:48,597 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:159, output treesize:108 [2019-11-23 20:38:48,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 20:38:48,685 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2019-11-23 20:38:48,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,693 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 21 [2019-11-23 20:38:48,694 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,705 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 27 [2019-11-23 20:38:48,706 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,740 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:38:48,744 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:38:48,744 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 10 variables, input treesize:140, output treesize:3 [2019-11-23 20:38:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:38:48,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:48,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-11-23 20:38:48,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678176043] [2019-11-23 20:38:48,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:38:48,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:38:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:38:48,764 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 9 states. [2019-11-23 20:38:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:49,671 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2019-11-23 20:38:49,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:38:49,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-23 20:38:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:49,674 INFO L225 Difference]: With dead ends: 97 [2019-11-23 20:38:49,674 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:38:49,675 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:38:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:38:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2019-11-23 20:38:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:38:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2019-11-23 20:38:49,683 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 32 [2019-11-23 20:38:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:49,683 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2019-11-23 20:38:49,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:38:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2019-11-23 20:38:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:38:49,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:49,685 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:49,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:49,889 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2046541918, now seen corresponding path program 1 times [2019-11-23 20:38:49,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:49,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112550066] [2019-11-23 20:38:49,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:38:49,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112550066] [2019-11-23 20:38:49,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990109685] [2019-11-23 20:38:49,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:50,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:38:50,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:38:50,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:50,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:38:50,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272191591] [2019-11-23 20:38:50,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:38:50,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:50,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:38:50,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:38:50,045 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 8 states. [2019-11-23 20:38:50,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:50,158 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2019-11-23 20:38:50,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:38:50,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-11-23 20:38:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:50,160 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:38:50,160 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:38:50,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 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 20:38:50,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:38:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2019-11-23 20:38:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:38:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2019-11-23 20:38:50,168 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 40 [2019-11-23 20:38:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:50,168 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2019-11-23 20:38:50,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:38:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2019-11-23 20:38:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:38:50,169 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:50,170 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:50,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,373 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:50,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:50,373 INFO L82 PathProgramCache]: Analyzing trace with hash 118526412, now seen corresponding path program 2 times [2019-11-23 20:38:50,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:50,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573035742] [2019-11-23 20:38:50,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:38:50,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573035742] [2019-11-23 20:38:50,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913821311] [2019-11-23 20:38:50,497 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:50,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:50,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:38:50,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-23 20:38:50,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:50,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:38:50,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841931587] [2019-11-23 20:38:50,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:38:50,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:50,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:38:50,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:38:50,573 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 9 states. [2019-11-23 20:38:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:50,713 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2019-11-23 20:38:50,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:38:50,714 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2019-11-23 20:38:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:50,717 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:38:50,717 INFO L226 Difference]: Without dead ends: 84 [2019-11-23 20:38:50,718 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 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 20:38:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-23 20:38:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2019-11-23 20:38:50,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:38:50,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2019-11-23 20:38:50,729 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 48 [2019-11-23 20:38:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:50,731 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2019-11-23 20:38:50,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:38:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2019-11-23 20:38:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:38:50,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:50,736 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:50,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:50,947 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:50,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1453858974, now seen corresponding path program 3 times [2019-11-23 20:38:50,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:50,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738955690] [2019-11-23 20:38:50,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:38:51,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738955690] [2019-11-23 20:38:51,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466155115] [2019-11-23 20:38:51,078 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:51,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:38:51,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:51,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:38:51,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:38:51,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:51,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:38:51,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940903571] [2019-11-23 20:38:51,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:38:51,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:51,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:38:51,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:38:51,158 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand 10 states. [2019-11-23 20:38:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:51,286 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2019-11-23 20:38:51,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:38:51,287 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2019-11-23 20:38:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:51,288 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:38:51,288 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:38:51,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 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 20:38:51,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:38:51,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2019-11-23 20:38:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:38:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2019-11-23 20:38:51,297 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 56 [2019-11-23 20:38:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:51,297 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2019-11-23 20:38:51,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:38:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2019-11-23 20:38:51,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:38:51,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:51,298 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:51,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:51,510 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1210542604, now seen corresponding path program 4 times [2019-11-23 20:38:51,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:51,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676785957] [2019-11-23 20:38:51,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 20:38:51,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676785957] [2019-11-23 20:38:51,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605001908] [2019-11-23 20:38:51,614 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:51,662 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:51,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:51,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:38:51,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:38:51,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:51,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:38:51,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426536587] [2019-11-23 20:38:51,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:38:51,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:51,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:38:51,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:38:51,696 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 11 states. [2019-11-23 20:38:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:51,817 INFO L93 Difference]: Finished difference Result 134 states and 166 transitions. [2019-11-23 20:38:51,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:38:51,817 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-11-23 20:38:51,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:51,818 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:38:51,818 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:38:51,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 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 20:38:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:38:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 98. [2019-11-23 20:38:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:38:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2019-11-23 20:38:51,826 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 64 [2019-11-23 20:38:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:51,827 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2019-11-23 20:38:51,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:38:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2019-11-23 20:38:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:38:51,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:51,829 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:52,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:52,032 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 250261282, now seen corresponding path program 5 times [2019-11-23 20:38:52,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:52,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578308825] [2019-11-23 20:38:52,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 20:38:52,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578308825] [2019-11-23 20:38:52,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667381153] [2019-11-23 20:38:52,165 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:52,234 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-11-23 20:38:52,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:52,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:38:52,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-11-23 20:38:52,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:52,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:38:52,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285630647] [2019-11-23 20:38:52,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:38:52,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:52,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:38:52,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:38:52,259 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 12 states. [2019-11-23 20:38:52,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:52,427 INFO L93 Difference]: Finished difference Result 148 states and 183 transitions. [2019-11-23 20:38:52,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:38:52,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-11-23 20:38:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:52,429 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:38:52,429 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:38:52,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 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 20:38:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:38:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2019-11-23 20:38:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-23 20:38:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 138 transitions. [2019-11-23 20:38:52,437 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 138 transitions. Word has length 72 [2019-11-23 20:38:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:52,437 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 138 transitions. [2019-11-23 20:38:52,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:38:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 138 transitions. [2019-11-23 20:38:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:38:52,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:52,439 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:52,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:52,643 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1756294580, now seen corresponding path program 6 times [2019-11-23 20:38:52,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:52,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718178809] [2019-11-23 20:38:52,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 20:38:52,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718178809] [2019-11-23 20:38:52,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998116941] [2019-11-23 20:38:52,787 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:52,889 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-11-23 20:38:52,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:52,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:38:52,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-11-23 20:38:52,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:52,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:38:52,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15494338] [2019-11-23 20:38:52,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:38:52,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:38:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:38:52,927 INFO L87 Difference]: Start difference. First operand 109 states and 138 transitions. Second operand 13 states. [2019-11-23 20:38:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:53,086 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2019-11-23 20:38:53,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:38:53,087 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-11-23 20:38:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:53,088 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:38:53,088 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:38:53,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 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 20:38:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:38:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2019-11-23 20:38:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:38:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 152 transitions. [2019-11-23 20:38:53,095 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 152 transitions. Word has length 80 [2019-11-23 20:38:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:53,095 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 152 transitions. [2019-11-23 20:38:53,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:38:53,096 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 152 transitions. [2019-11-23 20:38:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:38:53,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:53,097 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:53,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,308 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:53,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash 714649314, now seen corresponding path program 7 times [2019-11-23 20:38:53,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:53,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458334062] [2019-11-23 20:38:53,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:53,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2019-11-23 20:38:53,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458334062] [2019-11-23 20:38:53,440 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582811401] [2019-11-23 20:38:53,440 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:53,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:38:53,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 20:38:53,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:53,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:38:53,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925987006] [2019-11-23 20:38:53,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:38:53,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:53,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:38:53,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:38:53,526 INFO L87 Difference]: Start difference. First operand 120 states and 152 transitions. Second operand 14 states. [2019-11-23 20:38:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:53,708 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2019-11-23 20:38:53,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:38:53,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2019-11-23 20:38:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:53,710 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:38:53,710 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:38:53,712 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 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 20:38:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:38:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2019-11-23 20:38:53,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:38:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 166 transitions. [2019-11-23 20:38:53,719 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 166 transitions. Word has length 88 [2019-11-23 20:38:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:53,719 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 166 transitions. [2019-11-23 20:38:53,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:38:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 166 transitions. [2019-11-23 20:38:53,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:38:53,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:53,721 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:53,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:53,925 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:53,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:53,925 INFO L82 PathProgramCache]: Analyzing trace with hash -483292532, now seen corresponding path program 8 times [2019-11-23 20:38:53,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:53,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603263138] [2019-11-23 20:38:53,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-11-23 20:38:54,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603263138] [2019-11-23 20:38:54,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954728573] [2019-11-23 20:38:54,066 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:54,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:54,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:54,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:38:54,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:54,200 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 20:38:54,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:54,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:38:54,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201433369] [2019-11-23 20:38:54,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:38:54,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:38:54,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:38:54,206 INFO L87 Difference]: Start difference. First operand 131 states and 166 transitions. Second operand 15 states. [2019-11-23 20:38:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:54,401 INFO L93 Difference]: Finished difference Result 190 states and 234 transitions. [2019-11-23 20:38:54,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:38:54,401 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2019-11-23 20:38:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:54,402 INFO L225 Difference]: With dead ends: 190 [2019-11-23 20:38:54,402 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:38:54,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:38:54,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:38:54,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 142. [2019-11-23 20:38:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:38:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 180 transitions. [2019-11-23 20:38:54,412 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 180 transitions. Word has length 96 [2019-11-23 20:38:54,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:54,413 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 180 transitions. [2019-11-23 20:38:54,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:38:54,413 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 180 transitions. [2019-11-23 20:38:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-23 20:38:54,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:54,415 INFO L410 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:54,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:54,619 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:54,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:54,619 INFO L82 PathProgramCache]: Analyzing trace with hash 457039522, now seen corresponding path program 9 times [2019-11-23 20:38:54,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:54,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618978944] [2019-11-23 20:38:54,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-11-23 20:38:54,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618978944] [2019-11-23 20:38:54,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453161474] [2019-11-23 20:38:54,806 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:55,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-11-23 20:38:55,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:55,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:38:55,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 20:38:55,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:55,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:38:55,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711950524] [2019-11-23 20:38:55,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:38:55,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:38:55,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:38:55,060 INFO L87 Difference]: Start difference. First operand 142 states and 180 transitions. Second operand 16 states. [2019-11-23 20:38:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:55,255 INFO L93 Difference]: Finished difference Result 204 states and 251 transitions. [2019-11-23 20:38:55,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:38:55,256 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2019-11-23 20:38:55,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:55,257 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:38:55,257 INFO L226 Difference]: Without dead ends: 161 [2019-11-23 20:38:55,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 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 20:38:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-23 20:38:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 153. [2019-11-23 20:38:55,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-11-23 20:38:55,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 194 transitions. [2019-11-23 20:38:55,263 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 194 transitions. Word has length 104 [2019-11-23 20:38:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:55,263 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 194 transitions. [2019-11-23 20:38:55,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:38:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 194 transitions. [2019-11-23 20:38:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 20:38:55,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:55,265 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:55,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:55,469 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1888693556, now seen corresponding path program 10 times [2019-11-23 20:38:55,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:55,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118724118] [2019-11-23 20:38:55,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:55,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2019-11-23 20:38:55,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118724118] [2019-11-23 20:38:55,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185872135] [2019-11-23 20:38:55,623 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:55,701 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:38:55,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:55,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:38:55,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-23 20:38:55,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:55,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:38:55,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867621922] [2019-11-23 20:38:55,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:38:55,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:55,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:38:55,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:38:55,750 INFO L87 Difference]: Start difference. First operand 153 states and 194 transitions. Second operand 17 states. [2019-11-23 20:38:55,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:55,972 INFO L93 Difference]: Finished difference Result 218 states and 268 transitions. [2019-11-23 20:38:55,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:38:55,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2019-11-23 20:38:55,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:55,974 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:38:55,974 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 20:38:55,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 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 20:38:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 20:38:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2019-11-23 20:38:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-11-23 20:38:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 208 transitions. [2019-11-23 20:38:55,980 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 208 transitions. Word has length 112 [2019-11-23 20:38:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:55,981 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 208 transitions. [2019-11-23 20:38:55,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:38:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 208 transitions. [2019-11-23 20:38:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-23 20:38:55,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:55,982 INFO L410 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:56,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:56,186 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:56,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1790328418, now seen corresponding path program 11 times [2019-11-23 20:38:56,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:56,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377377705] [2019-11-23 20:38:56,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-23 20:38:56,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377377705] [2019-11-23 20:38:56,380 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522337238] [2019-11-23 20:38:56,380 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:56,487 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-11-23 20:38:56,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:56,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:38:56,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2019-11-23 20:38:56,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:56,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:38:56,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442910127] [2019-11-23 20:38:56,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:38:56,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:56,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:38:56,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:38:56,536 INFO L87 Difference]: Start difference. First operand 164 states and 208 transitions. Second operand 18 states. [2019-11-23 20:38:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:56,811 INFO L93 Difference]: Finished difference Result 232 states and 285 transitions. [2019-11-23 20:38:56,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:38:56,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2019-11-23 20:38:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:56,813 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:38:56,814 INFO L226 Difference]: Without dead ends: 183 [2019-11-23 20:38:56,814 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 120 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 20:38:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-23 20:38:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 175. [2019-11-23 20:38:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 20:38:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 222 transitions. [2019-11-23 20:38:56,821 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 222 transitions. Word has length 120 [2019-11-23 20:38:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:56,821 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 222 transitions. [2019-11-23 20:38:56,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:38:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 222 transitions. [2019-11-23 20:38:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-23 20:38:56,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:56,823 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:57,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:57,027 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1264129268, now seen corresponding path program 12 times [2019-11-23 20:38:57,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:57,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421589484] [2019-11-23 20:38:57,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:57,205 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 20:38:57,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421589484] [2019-11-23 20:38:57,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418127097] [2019-11-23 20:38:57,206 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:57,593 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-11-23 20:38:57,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:57,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:38:57,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 20:38:57,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:57,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:38:57,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883094638] [2019-11-23 20:38:57,621 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:38:57,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:57,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:38:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:38:57,622 INFO L87 Difference]: Start difference. First operand 175 states and 222 transitions. Second operand 19 states. [2019-11-23 20:38:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:57,906 INFO L93 Difference]: Finished difference Result 246 states and 302 transitions. [2019-11-23 20:38:57,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:38:57,907 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2019-11-23 20:38:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:57,908 INFO L225 Difference]: With dead ends: 246 [2019-11-23 20:38:57,908 INFO L226 Difference]: Without dead ends: 194 [2019-11-23 20:38:57,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 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 20:38:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-11-23 20:38:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 186. [2019-11-23 20:38:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-23 20:38:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 236 transitions. [2019-11-23 20:38:57,915 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 236 transitions. Word has length 128 [2019-11-23 20:38:57,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:57,916 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 236 transitions. [2019-11-23 20:38:57,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:38:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 236 transitions. [2019-11-23 20:38:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 20:38:57,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:57,917 INFO L410 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:58,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:58,122 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:58,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:58,122 INFO L82 PathProgramCache]: Analyzing trace with hash -841101790, now seen corresponding path program 13 times [2019-11-23 20:38:58,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:58,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075197767] [2019-11-23 20:38:58,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-11-23 20:38:58,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075197767] [2019-11-23 20:38:58,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977627163] [2019-11-23 20:38:58,350 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:58,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:38:58,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-23 20:38:58,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:58,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:38:58,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773538535] [2019-11-23 20:38:58,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:38:58,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:58,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:38:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:38:58,451 INFO L87 Difference]: Start difference. First operand 186 states and 236 transitions. Second operand 20 states. [2019-11-23 20:38:58,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:58,700 INFO L93 Difference]: Finished difference Result 260 states and 319 transitions. [2019-11-23 20:38:58,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:38:58,700 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2019-11-23 20:38:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:58,702 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:38:58,702 INFO L226 Difference]: Without dead ends: 205 [2019-11-23 20:38:58,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 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 20:38:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-23 20:38:58,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 197. [2019-11-23 20:38:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 20:38:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 250 transitions. [2019-11-23 20:38:58,710 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 250 transitions. Word has length 136 [2019-11-23 20:38:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:58,710 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 250 transitions. [2019-11-23 20:38:58,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:38:58,710 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 250 transitions. [2019-11-23 20:38:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 20:38:58,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:58,711 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:58,911 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:58,912 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1619252044, now seen corresponding path program 14 times [2019-11-23 20:38:58,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:58,913 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552181845] [2019-11-23 20:38:58,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:38:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2019-11-23 20:38:59,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552181845] [2019-11-23 20:38:59,193 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334218544] [2019-11-23 20:38:59,193 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:59,287 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:38:59,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:38:59,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:38:59,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:38:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-23 20:38:59,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:38:59,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:38:59,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939479931] [2019-11-23 20:38:59,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:38:59,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:38:59,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:38:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:38:59,343 INFO L87 Difference]: Start difference. First operand 197 states and 250 transitions. Second operand 21 states. [2019-11-23 20:38:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:38:59,639 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2019-11-23 20:38:59,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:38:59,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2019-11-23 20:38:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:38:59,641 INFO L225 Difference]: With dead ends: 274 [2019-11-23 20:38:59,641 INFO L226 Difference]: Without dead ends: 216 [2019-11-23 20:38:59,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:38:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-23 20:38:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2019-11-23 20:38:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 20:38:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2019-11-23 20:38:59,651 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 144 [2019-11-23 20:38:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:38:59,652 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2019-11-23 20:38:59,652 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:38:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2019-11-23 20:38:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-23 20:38:59,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:38:59,654 INFO L410 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:38:59,859 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:38:59,859 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:38:59,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:38:59,860 INFO L82 PathProgramCache]: Analyzing trace with hash -460288542, now seen corresponding path program 15 times [2019-11-23 20:38:59,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:38:59,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305730068] [2019-11-23 20:38:59,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:38:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:39:00,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305730068] [2019-11-23 20:39:00,225 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426596379] [2019-11-23 20:39:00,225 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:00,555 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-23 20:39:00,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:00,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:39:00,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-23 20:39:00,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:00,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:39:00,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271790203] [2019-11-23 20:39:00,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:39:00,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:00,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:39:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:39:00,611 INFO L87 Difference]: Start difference. First operand 208 states and 264 transitions. Second operand 22 states. [2019-11-23 20:39:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:00,927 INFO L93 Difference]: Finished difference Result 288 states and 353 transitions. [2019-11-23 20:39:00,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:39:00,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2019-11-23 20:39:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:00,930 INFO L225 Difference]: With dead ends: 288 [2019-11-23 20:39:00,930 INFO L226 Difference]: Without dead ends: 227 [2019-11-23 20:39:00,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:39:00,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-11-23 20:39:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 219. [2019-11-23 20:39:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-11-23 20:39:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 278 transitions. [2019-11-23 20:39:00,937 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 278 transitions. Word has length 152 [2019-11-23 20:39:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:00,937 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 278 transitions. [2019-11-23 20:39:00,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:39:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 278 transitions. [2019-11-23 20:39:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-23 20:39:00,938 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:00,938 INFO L410 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:01,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,142 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:01,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:01,143 INFO L82 PathProgramCache]: Analyzing trace with hash -710440052, now seen corresponding path program 16 times [2019-11-23 20:39:01,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:01,144 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952769573] [2019-11-23 20:39:01,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2019-11-23 20:39:01,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952769573] [2019-11-23 20:39:01,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586023931] [2019-11-23 20:39:01,446 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:01,556 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:01,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:01,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:39:01,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:01,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-23 20:39:01,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:01,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:39:01,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143439565] [2019-11-23 20:39:01,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:39:01,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:39:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:39:01,618 INFO L87 Difference]: Start difference. First operand 219 states and 278 transitions. Second operand 23 states. [2019-11-23 20:39:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:01,940 INFO L93 Difference]: Finished difference Result 302 states and 370 transitions. [2019-11-23 20:39:01,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:39:01,941 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2019-11-23 20:39:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:01,942 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:39:01,943 INFO L226 Difference]: Without dead ends: 238 [2019-11-23 20:39:01,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 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 20:39:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-23 20:39:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2019-11-23 20:39:01,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-11-23 20:39:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 292 transitions. [2019-11-23 20:39:01,950 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 292 transitions. Word has length 160 [2019-11-23 20:39:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:01,950 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 292 transitions. [2019-11-23 20:39:01,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:39:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 292 transitions. [2019-11-23 20:39:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:39:01,951 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:01,951 INFO L410 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:02,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,163 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -106267230, now seen corresponding path program 17 times [2019-11-23 20:39:02,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:02,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733138378] [2019-11-23 20:39:02,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:02,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-11-23 20:39:02,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733138378] [2019-11-23 20:39:02,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726240778] [2019-11-23 20:39:02,438 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:02,645 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-11-23 20:39:02,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:02,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:39:02,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2019-11-23 20:39:02,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:02,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:39:02,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423759135] [2019-11-23 20:39:02,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:39:02,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:02,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:39:02,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:39:02,690 INFO L87 Difference]: Start difference. First operand 230 states and 292 transitions. Second operand 24 states. [2019-11-23 20:39:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:03,049 INFO L93 Difference]: Finished difference Result 316 states and 387 transitions. [2019-11-23 20:39:03,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:39:03,051 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2019-11-23 20:39:03,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:03,052 INFO L225 Difference]: With dead ends: 316 [2019-11-23 20:39:03,052 INFO L226 Difference]: Without dead ends: 249 [2019-11-23 20:39:03,053 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:39:03,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2019-11-23 20:39:03,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 241. [2019-11-23 20:39:03,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-11-23 20:39:03,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 306 transitions. [2019-11-23 20:39:03,063 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 306 transitions. Word has length 168 [2019-11-23 20:39:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:03,064 INFO L462 AbstractCegarLoop]: Abstraction has 241 states and 306 transitions. [2019-11-23 20:39:03,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:39:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 306 transitions. [2019-11-23 20:39:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-11-23 20:39:03,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:03,065 INFO L410 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:03,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:03,268 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:03,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:03,269 INFO L82 PathProgramCache]: Analyzing trace with hash -877259828, now seen corresponding path program 18 times [2019-11-23 20:39:03,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:03,269 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880763926] [2019-11-23 20:39:03,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2019-11-23 20:39:03,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880763926] [2019-11-23 20:39:03,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567479308] [2019-11-23 20:39:03,579 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:04,869 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-11-23 20:39:04,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:04,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:39:04,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-23 20:39:04,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:04,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:39:04,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313087313] [2019-11-23 20:39:04,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:39:04,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:39:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:39:04,923 INFO L87 Difference]: Start difference. First operand 241 states and 306 transitions. Second operand 25 states. [2019-11-23 20:39:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:05,231 INFO L93 Difference]: Finished difference Result 330 states and 404 transitions. [2019-11-23 20:39:05,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:39:05,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 176 [2019-11-23 20:39:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:05,239 INFO L225 Difference]: With dead ends: 330 [2019-11-23 20:39:05,240 INFO L226 Difference]: Without dead ends: 260 [2019-11-23 20:39:05,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:39:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-11-23 20:39:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 252. [2019-11-23 20:39:05,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-11-23 20:39:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 320 transitions. [2019-11-23 20:39:05,255 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 320 transitions. Word has length 176 [2019-11-23 20:39:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:05,255 INFO L462 AbstractCegarLoop]: Abstraction has 252 states and 320 transitions. [2019-11-23 20:39:05,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:39:05,256 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 320 transitions. [2019-11-23 20:39:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 20:39:05,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:05,258 INFO L410 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:05,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,466 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1022911134, now seen corresponding path program 19 times [2019-11-23 20:39:05,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:05,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916666840] [2019-11-23 20:39:05,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:05,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-11-23 20:39:05,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916666840] [2019-11-23 20:39:05,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866889413] [2019-11-23 20:39:05,779 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:05,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:39:05,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-11-23 20:39:05,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:05,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:39:05,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017820210] [2019-11-23 20:39:05,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:39:05,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:05,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:39:05,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:39:05,900 INFO L87 Difference]: Start difference. First operand 252 states and 320 transitions. Second operand 26 states. [2019-11-23 20:39:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:06,273 INFO L93 Difference]: Finished difference Result 344 states and 421 transitions. [2019-11-23 20:39:06,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:39:06,274 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 184 [2019-11-23 20:39:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:06,276 INFO L225 Difference]: With dead ends: 344 [2019-11-23 20:39:06,276 INFO L226 Difference]: Without dead ends: 271 [2019-11-23 20:39:06,277 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 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 20:39:06,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-11-23 20:39:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 263. [2019-11-23 20:39:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2019-11-23 20:39:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 334 transitions. [2019-11-23 20:39:06,285 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 334 transitions. Word has length 184 [2019-11-23 20:39:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:06,286 INFO L462 AbstractCegarLoop]: Abstraction has 263 states and 334 transitions. [2019-11-23 20:39:06,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:39:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 334 transitions. [2019-11-23 20:39:06,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-23 20:39:06,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:06,288 INFO L410 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:06,492 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:06,492 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:06,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:06,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1353487348, now seen corresponding path program 20 times [2019-11-23 20:39:06,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:06,493 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610629500] [2019-11-23 20:39:06,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2019-11-23 20:39:07,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610629500] [2019-11-23 20:39:07,028 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397433431] [2019-11-23 20:39:07,029 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:07,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:07,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:07,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:39:07,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-11-23 20:39:07,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:07,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:39:07,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697646875] [2019-11-23 20:39:07,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:39:07,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:07,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:39:07,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:39:07,204 INFO L87 Difference]: Start difference. First operand 263 states and 334 transitions. Second operand 27 states. [2019-11-23 20:39:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:07,601 INFO L93 Difference]: Finished difference Result 358 states and 438 transitions. [2019-11-23 20:39:07,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:39:07,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 192 [2019-11-23 20:39:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:07,604 INFO L225 Difference]: With dead ends: 358 [2019-11-23 20:39:07,604 INFO L226 Difference]: Without dead ends: 282 [2019-11-23 20:39:07,605 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:39:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-11-23 20:39:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 274. [2019-11-23 20:39:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2019-11-23 20:39:07,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 348 transitions. [2019-11-23 20:39:07,612 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 348 transitions. Word has length 192 [2019-11-23 20:39:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:07,612 INFO L462 AbstractCegarLoop]: Abstraction has 274 states and 348 transitions. [2019-11-23 20:39:07,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:39:07,613 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 348 transitions. [2019-11-23 20:39:07,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-23 20:39:07,614 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:07,614 INFO L410 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:07,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:07,818 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:07,818 INFO L82 PathProgramCache]: Analyzing trace with hash 562294050, now seen corresponding path program 21 times [2019-11-23 20:39:07,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:07,819 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519358128] [2019-11-23 20:39:07,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-11-23 20:39:08,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519358128] [2019-11-23 20:39:08,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768274038] [2019-11-23 20:39:08,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:09,903 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-11-23 20:39:09,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:09,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:39:09,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2019-11-23 20:39:09,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:09,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:39:09,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970731315] [2019-11-23 20:39:09,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:39:09,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:39:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:39:09,967 INFO L87 Difference]: Start difference. First operand 274 states and 348 transitions. Second operand 28 states. [2019-11-23 20:39:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:10,468 INFO L93 Difference]: Finished difference Result 372 states and 455 transitions. [2019-11-23 20:39:10,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:39:10,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 200 [2019-11-23 20:39:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:10,471 INFO L225 Difference]: With dead ends: 372 [2019-11-23 20:39:10,471 INFO L226 Difference]: Without dead ends: 293 [2019-11-23 20:39:10,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:39:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2019-11-23 20:39:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 285. [2019-11-23 20:39:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2019-11-23 20:39:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 362 transitions. [2019-11-23 20:39:10,482 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 362 transitions. Word has length 200 [2019-11-23 20:39:10,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:10,483 INFO L462 AbstractCegarLoop]: Abstraction has 285 states and 362 transitions. [2019-11-23 20:39:10,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:39:10,483 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 362 transitions. [2019-11-23 20:39:10,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-11-23 20:39:10,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:10,486 INFO L410 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:10,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:10,687 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:10,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:10,688 INFO L82 PathProgramCache]: Analyzing trace with hash -500984756, now seen corresponding path program 22 times [2019-11-23 20:39:10,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:10,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232237725] [2019-11-23 20:39:10,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2019-11-23 20:39:11,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232237725] [2019-11-23 20:39:11,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233008446] [2019-11-23 20:39:11,202 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:11,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:11,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:11,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:39:11,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-11-23 20:39:11,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:11,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:39:11,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230336423] [2019-11-23 20:39:11,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:39:11,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:11,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:39:11,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:39:11,342 INFO L87 Difference]: Start difference. First operand 285 states and 362 transitions. Second operand 29 states. [2019-11-23 20:39:11,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:11,742 INFO L93 Difference]: Finished difference Result 386 states and 472 transitions. [2019-11-23 20:39:11,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:39:11,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2019-11-23 20:39:11,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:11,745 INFO L225 Difference]: With dead ends: 386 [2019-11-23 20:39:11,745 INFO L226 Difference]: Without dead ends: 304 [2019-11-23 20:39:11,746 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:39:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2019-11-23 20:39:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 296. [2019-11-23 20:39:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-23 20:39:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 376 transitions. [2019-11-23 20:39:11,753 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 376 transitions. Word has length 208 [2019-11-23 20:39:11,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:11,753 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 376 transitions. [2019-11-23 20:39:11,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:39:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 376 transitions. [2019-11-23 20:39:11,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-11-23 20:39:11,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:11,755 INFO L410 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:11,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:11,958 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:11,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:11,959 INFO L82 PathProgramCache]: Analyzing trace with hash -520393502, now seen corresponding path program 23 times [2019-11-23 20:39:11,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:11,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836606210] [2019-11-23 20:39:11,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2019-11-23 20:39:12,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836606210] [2019-11-23 20:39:12,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466559722] [2019-11-23 20:39:12,504 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:12,940 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-11-23 20:39:12,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:12,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:39:12,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-11-23 20:39:13,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:13,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:39:13,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902504047] [2019-11-23 20:39:13,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:39:13,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:13,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:39:13,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:39:13,014 INFO L87 Difference]: Start difference. First operand 296 states and 376 transitions. Second operand 30 states. [2019-11-23 20:39:13,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:13,415 INFO L93 Difference]: Finished difference Result 400 states and 489 transitions. [2019-11-23 20:39:13,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:39:13,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 216 [2019-11-23 20:39:13,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:13,418 INFO L225 Difference]: With dead ends: 400 [2019-11-23 20:39:13,418 INFO L226 Difference]: Without dead ends: 315 [2019-11-23 20:39:13,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:39:13,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2019-11-23 20:39:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 307. [2019-11-23 20:39:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2019-11-23 20:39:13,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 390 transitions. [2019-11-23 20:39:13,426 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 390 transitions. Word has length 216 [2019-11-23 20:39:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:13,426 INFO L462 AbstractCegarLoop]: Abstraction has 307 states and 390 transitions. [2019-11-23 20:39:13,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:39:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 390 transitions. [2019-11-23 20:39:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-23 20:39:13,429 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:13,429 INFO L410 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:13,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:13,635 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:13,636 INFO L82 PathProgramCache]: Analyzing trace with hash -87389044, now seen corresponding path program 24 times [2019-11-23 20:39:13,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:13,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098464787] [2019-11-23 20:39:13,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-11-23 20:39:14,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098464787] [2019-11-23 20:39:14,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995427] [2019-11-23 20:39:14,189 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:21,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-11-23 20:39:21,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:21,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 20:39:21,497 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2019-11-23 20:39:21,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:21,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 20:39:21,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545446851] [2019-11-23 20:39:21,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:39:21,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:39:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:39:21,550 INFO L87 Difference]: Start difference. First operand 307 states and 390 transitions. Second operand 31 states. [2019-11-23 20:39:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:22,008 INFO L93 Difference]: Finished difference Result 414 states and 506 transitions. [2019-11-23 20:39:22,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:39:22,009 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 224 [2019-11-23 20:39:22,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:22,010 INFO L225 Difference]: With dead ends: 414 [2019-11-23 20:39:22,010 INFO L226 Difference]: Without dead ends: 326 [2019-11-23 20:39:22,011 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:39:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-11-23 20:39:22,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2019-11-23 20:39:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2019-11-23 20:39:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 404 transitions. [2019-11-23 20:39:22,018 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 404 transitions. Word has length 224 [2019-11-23 20:39:22,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:22,019 INFO L462 AbstractCegarLoop]: Abstraction has 318 states and 404 transitions. [2019-11-23 20:39:22,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:39:22,019 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 404 transitions. [2019-11-23 20:39:22,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-23 20:39:22,020 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:22,020 INFO L410 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:22,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:22,228 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2018122914, now seen corresponding path program 25 times [2019-11-23 20:39:22,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:22,228 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250383160] [2019-11-23 20:39:22,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:22,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2019-11-23 20:39:22,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250383160] [2019-11-23 20:39:22,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800979768] [2019-11-23 20:39:22,729 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:22,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:39:22,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-11-23 20:39:22,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:22,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:39:22,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137621279] [2019-11-23 20:39:22,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:39:22,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:22,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:39:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:39:22,869 INFO L87 Difference]: Start difference. First operand 318 states and 404 transitions. Second operand 32 states. [2019-11-23 20:39:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:23,469 INFO L93 Difference]: Finished difference Result 428 states and 523 transitions. [2019-11-23 20:39:23,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:39:23,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 232 [2019-11-23 20:39:23,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:23,472 INFO L225 Difference]: With dead ends: 428 [2019-11-23 20:39:23,472 INFO L226 Difference]: Without dead ends: 337 [2019-11-23 20:39:23,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:39:23,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2019-11-23 20:39:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 329. [2019-11-23 20:39:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2019-11-23 20:39:23,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 418 transitions. [2019-11-23 20:39:23,483 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 418 transitions. Word has length 232 [2019-11-23 20:39:23,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:23,483 INFO L462 AbstractCegarLoop]: Abstraction has 329 states and 418 transitions. [2019-11-23 20:39:23,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:39:23,484 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 418 transitions. [2019-11-23 20:39:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-23 20:39:23,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:23,485 INFO L410 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:23,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:23,689 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:23,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:23,690 INFO L82 PathProgramCache]: Analyzing trace with hash 82597068, now seen corresponding path program 26 times [2019-11-23 20:39:23,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:23,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847950466] [2019-11-23 20:39:23,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2019-11-23 20:39:24,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847950466] [2019-11-23 20:39:24,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869955313] [2019-11-23 20:39:24,201 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:24,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:24,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:24,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:39:24,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2019-11-23 20:39:24,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:24,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:39:24,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666335183] [2019-11-23 20:39:24,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:39:24,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:39:24,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:39:24,377 INFO L87 Difference]: Start difference. First operand 329 states and 418 transitions. Second operand 33 states. [2019-11-23 20:39:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:24,839 INFO L93 Difference]: Finished difference Result 442 states and 540 transitions. [2019-11-23 20:39:24,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:39:24,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 240 [2019-11-23 20:39:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:24,842 INFO L225 Difference]: With dead ends: 442 [2019-11-23 20:39:24,842 INFO L226 Difference]: Without dead ends: 348 [2019-11-23 20:39:24,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:39:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2019-11-23 20:39:24,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 340. [2019-11-23 20:39:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2019-11-23 20:39:24,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 432 transitions. [2019-11-23 20:39:24,850 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 432 transitions. Word has length 240 [2019-11-23 20:39:24,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:24,851 INFO L462 AbstractCegarLoop]: Abstraction has 340 states and 432 transitions. [2019-11-23 20:39:24,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:39:24,851 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 432 transitions. [2019-11-23 20:39:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-11-23 20:39:24,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:24,852 INFO L410 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:25,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:25,056 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:25,057 INFO L82 PathProgramCache]: Analyzing trace with hash -917767070, now seen corresponding path program 27 times [2019-11-23 20:39:25,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:25,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778606930] [2019-11-23 20:39:25,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2019-11-23 20:39:25,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778606930] [2019-11-23 20:39:25,544 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860988579] [2019-11-23 20:39:25,544 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:28,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2019-11-23 20:39:28,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:28,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:39:28,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2019-11-23 20:39:29,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:29,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 20:39:29,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776844285] [2019-11-23 20:39:29,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:39:29,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:29,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:39:29,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:39:29,002 INFO L87 Difference]: Start difference. First operand 340 states and 432 transitions. Second operand 34 states. [2019-11-23 20:39:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:29,576 INFO L93 Difference]: Finished difference Result 456 states and 557 transitions. [2019-11-23 20:39:29,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:39:29,576 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 248 [2019-11-23 20:39:29,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:29,578 INFO L225 Difference]: With dead ends: 456 [2019-11-23 20:39:29,578 INFO L226 Difference]: Without dead ends: 359 [2019-11-23 20:39:29,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:39:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2019-11-23 20:39:29,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 351. [2019-11-23 20:39:29,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-23 20:39:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 446 transitions. [2019-11-23 20:39:29,586 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 446 transitions. Word has length 248 [2019-11-23 20:39:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:29,586 INFO L462 AbstractCegarLoop]: Abstraction has 351 states and 446 transitions. [2019-11-23 20:39:29,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:39:29,586 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 446 transitions. [2019-11-23 20:39:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-23 20:39:29,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:29,588 INFO L410 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:29,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:29,795 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:29,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:29,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1054020340, now seen corresponding path program 28 times [2019-11-23 20:39:29,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:29,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730830610] [2019-11-23 20:39:29,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2019-11-23 20:39:30,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730830610] [2019-11-23 20:39:30,437 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258369341] [2019-11-23 20:39:30,437 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:30,564 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:39:30,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:30,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:39:30,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 2356 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2019-11-23 20:39:30,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:30,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:39:30,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697274635] [2019-11-23 20:39:30,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:39:30,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:39:30,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:39:30,696 INFO L87 Difference]: Start difference. First operand 351 states and 446 transitions. Second operand 35 states. [2019-11-23 20:39:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:31,236 INFO L93 Difference]: Finished difference Result 470 states and 574 transitions. [2019-11-23 20:39:31,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:39:31,237 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 256 [2019-11-23 20:39:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:31,240 INFO L225 Difference]: With dead ends: 470 [2019-11-23 20:39:31,240 INFO L226 Difference]: Without dead ends: 370 [2019-11-23 20:39:31,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:39:31,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2019-11-23 20:39:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 362. [2019-11-23 20:39:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2019-11-23 20:39:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 460 transitions. [2019-11-23 20:39:31,248 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 460 transitions. Word has length 256 [2019-11-23 20:39:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:31,249 INFO L462 AbstractCegarLoop]: Abstraction has 362 states and 460 transitions. [2019-11-23 20:39:31,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:39:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 460 transitions. [2019-11-23 20:39:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-11-23 20:39:31,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:31,250 INFO L410 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:31,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:31,454 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:31,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:31,454 INFO L82 PathProgramCache]: Analyzing trace with hash -522384350, now seen corresponding path program 29 times [2019-11-23 20:39:31,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:31,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190961043] [2019-11-23 20:39:31,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2019-11-23 20:39:32,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190961043] [2019-11-23 20:39:32,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697732512] [2019-11-23 20:39:32,007 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:32,901 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-23 20:39:32,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:32,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:39:32,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2019-11-23 20:39:32,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:32,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:39:32,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026093256] [2019-11-23 20:39:32,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:39:32,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:32,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:39:32,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:39:32,966 INFO L87 Difference]: Start difference. First operand 362 states and 460 transitions. Second operand 36 states. [2019-11-23 20:39:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:33,562 INFO L93 Difference]: Finished difference Result 484 states and 591 transitions. [2019-11-23 20:39:33,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:39:33,562 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 264 [2019-11-23 20:39:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:33,565 INFO L225 Difference]: With dead ends: 484 [2019-11-23 20:39:33,567 INFO L226 Difference]: Without dead ends: 381 [2019-11-23 20:39:33,568 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:39:33,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2019-11-23 20:39:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 373. [2019-11-23 20:39:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-11-23 20:39:33,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 474 transitions. [2019-11-23 20:39:33,574 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 474 transitions. Word has length 264 [2019-11-23 20:39:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:33,575 INFO L462 AbstractCegarLoop]: Abstraction has 373 states and 474 transitions. [2019-11-23 20:39:33,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:39:33,575 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 474 transitions. [2019-11-23 20:39:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-11-23 20:39:33,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:33,577 INFO L410 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:33,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:33,782 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:33,783 INFO L82 PathProgramCache]: Analyzing trace with hash -449817268, now seen corresponding path program 30 times [2019-11-23 20:39:33,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:33,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527959800] [2019-11-23 20:39:33,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2673 trivial. 0 not checked. [2019-11-23 20:39:34,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527959800] [2019-11-23 20:39:34,382 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735171837] [2019-11-23 20:39:34,382 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:41,702 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-11-23 20:39:41,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:41,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:39:41,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2019-11-23 20:39:41,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:41,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 20:39:41,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542538919] [2019-11-23 20:39:41,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:39:41,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:39:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:39:41,793 INFO L87 Difference]: Start difference. First operand 373 states and 474 transitions. Second operand 37 states. [2019-11-23 20:39:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:42,382 INFO L93 Difference]: Finished difference Result 498 states and 608 transitions. [2019-11-23 20:39:42,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:39:42,382 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 272 [2019-11-23 20:39:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:42,384 INFO L225 Difference]: With dead ends: 498 [2019-11-23 20:39:42,384 INFO L226 Difference]: Without dead ends: 392 [2019-11-23 20:39:42,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:39:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2019-11-23 20:39:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 384. [2019-11-23 20:39:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2019-11-23 20:39:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 488 transitions. [2019-11-23 20:39:42,392 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 488 transitions. Word has length 272 [2019-11-23 20:39:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:42,392 INFO L462 AbstractCegarLoop]: Abstraction has 384 states and 488 transitions. [2019-11-23 20:39:42,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:39:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 488 transitions. [2019-11-23 20:39:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-23 20:39:42,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:42,394 INFO L410 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:42,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:42,602 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1227273246, now seen corresponding path program 31 times [2019-11-23 20:39:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:42,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148352774] [2019-11-23 20:39:42,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2019-11-23 20:39:43,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148352774] [2019-11-23 20:39:43,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483434675] [2019-11-23 20:39:43,502 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:43,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:39:43,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:43,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2019-11-23 20:39:43,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:43,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:39:43,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475221618] [2019-11-23 20:39:43,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:39:43,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:43,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:39:43,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:39:43,742 INFO L87 Difference]: Start difference. First operand 384 states and 488 transitions. Second operand 38 states. [2019-11-23 20:39:44,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:44,313 INFO L93 Difference]: Finished difference Result 512 states and 625 transitions. [2019-11-23 20:39:44,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:39:44,313 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2019-11-23 20:39:44,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:44,316 INFO L225 Difference]: With dead ends: 512 [2019-11-23 20:39:44,316 INFO L226 Difference]: Without dead ends: 403 [2019-11-23 20:39:44,317 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:39:44,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2019-11-23 20:39:44,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2019-11-23 20:39:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2019-11-23 20:39:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 502 transitions. [2019-11-23 20:39:44,324 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 502 transitions. Word has length 280 [2019-11-23 20:39:44,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:44,324 INFO L462 AbstractCegarLoop]: Abstraction has 395 states and 502 transitions. [2019-11-23 20:39:44,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:39:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 502 transitions. [2019-11-23 20:39:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-11-23 20:39:44,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:44,326 INFO L410 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:44,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:44,530 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:44,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1536855436, now seen corresponding path program 32 times [2019-11-23 20:39:44,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:44,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167786473] [2019-11-23 20:39:44,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:44,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3010 trivial. 0 not checked. [2019-11-23 20:39:45,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167786473] [2019-11-23 20:39:45,260 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008477813] [2019-11-23 20:39:45,260 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:45,380 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:39:45,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:39:45,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:39:45,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:39:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2019-11-23 20:39:45,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:39:45,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:39:45,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240466373] [2019-11-23 20:39:45,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:39:45,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:39:45,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:39:45,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:39:45,450 INFO L87 Difference]: Start difference. First operand 395 states and 502 transitions. Second operand 39 states. [2019-11-23 20:39:46,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:39:46,042 INFO L93 Difference]: Finished difference Result 526 states and 642 transitions. [2019-11-23 20:39:46,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:39:46,043 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 288 [2019-11-23 20:39:46,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:39:46,045 INFO L225 Difference]: With dead ends: 526 [2019-11-23 20:39:46,045 INFO L226 Difference]: Without dead ends: 414 [2019-11-23 20:39:46,046 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:39:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2019-11-23 20:39:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 406. [2019-11-23 20:39:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2019-11-23 20:39:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 516 transitions. [2019-11-23 20:39:46,053 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 516 transitions. Word has length 288 [2019-11-23 20:39:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:39:46,053 INFO L462 AbstractCegarLoop]: Abstraction has 406 states and 516 transitions. [2019-11-23 20:39:46,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:39:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 516 transitions. [2019-11-23 20:39:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-11-23 20:39:46,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:39:46,055 INFO L410 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:39:46,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:39:46,259 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:39:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:39:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash -300106846, now seen corresponding path program 33 times [2019-11-23 20:39:46,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:39:46,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077250337] [2019-11-23 20:39:46,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:39:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:39:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2019-11-23 20:39:47,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077250337] [2019-11-23 20:39:47,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168109218] [2019-11-23 20:39:47,023 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:03,785 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2019-11-23 20:40:03,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:03,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:40:03,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2019-11-23 20:40:03,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:40:03,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 20:40:03,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94835522] [2019-11-23 20:40:03,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:40:03,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:03,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:40:03,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:40:03,896 INFO L87 Difference]: Start difference. First operand 406 states and 516 transitions. Second operand 40 states. [2019-11-23 20:40:04,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:04,558 INFO L93 Difference]: Finished difference Result 540 states and 659 transitions. [2019-11-23 20:40:04,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:40:04,559 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 296 [2019-11-23 20:40:04,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:04,562 INFO L225 Difference]: With dead ends: 540 [2019-11-23 20:40:04,562 INFO L226 Difference]: Without dead ends: 425 [2019-11-23 20:40:04,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:40:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-11-23 20:40:04,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 417. [2019-11-23 20:40:04,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-11-23 20:40:04,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 530 transitions. [2019-11-23 20:40:04,568 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 530 transitions. Word has length 296 [2019-11-23 20:40:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:04,568 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 530 transitions. [2019-11-23 20:40:04,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:40:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 530 transitions. [2019-11-23 20:40:04,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-11-23 20:40:04,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:04,570 INFO L410 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:04,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:04,771 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2079353396, now seen corresponding path program 34 times [2019-11-23 20:40:04,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:04,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514974603] [2019-11-23 20:40:04,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2019-11-23 20:40:05,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514974603] [2019-11-23 20:40:05,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298005083] [2019-11-23 20:40:05,554 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:05,678 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:05,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:05,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:40:05,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 3367 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2019-11-23 20:40:05,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:40:05,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:40:05,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633400844] [2019-11-23 20:40:05,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:40:05,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:40:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:40:05,748 INFO L87 Difference]: Start difference. First operand 417 states and 530 transitions. Second operand 41 states. [2019-11-23 20:40:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:06,342 INFO L93 Difference]: Finished difference Result 554 states and 676 transitions. [2019-11-23 20:40:06,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:40:06,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 304 [2019-11-23 20:40:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:06,345 INFO L225 Difference]: With dead ends: 554 [2019-11-23 20:40:06,345 INFO L226 Difference]: Without dead ends: 436 [2019-11-23 20:40:06,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:40:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2019-11-23 20:40:06,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 428. [2019-11-23 20:40:06,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2019-11-23 20:40:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 544 transitions. [2019-11-23 20:40:06,352 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 544 transitions. Word has length 304 [2019-11-23 20:40:06,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:06,353 INFO L462 AbstractCegarLoop]: Abstraction has 428 states and 544 transitions. [2019-11-23 20:40:06,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:40:06,353 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 544 transitions. [2019-11-23 20:40:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-11-23 20:40:06,355 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:06,355 INFO L410 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:06,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:06,559 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:06,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1803330718, now seen corresponding path program 35 times [2019-11-23 20:40:06,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:06,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639461124] [2019-11-23 20:40:06,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:07,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2019-11-23 20:40:07,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639461124] [2019-11-23 20:40:07,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823271907] [2019-11-23 20:40:07,250 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:08,720 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2019-11-23 20:40:08,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:08,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:40:08,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 3553 trivial. 0 not checked. [2019-11-23 20:40:08,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:40:08,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:40:08,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098239857] [2019-11-23 20:40:08,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:40:08,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:08,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:40:08,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:40:08,825 INFO L87 Difference]: Start difference. First operand 428 states and 544 transitions. Second operand 42 states. [2019-11-23 20:40:09,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:09,523 INFO L93 Difference]: Finished difference Result 568 states and 693 transitions. [2019-11-23 20:40:09,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:40:09,524 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 312 [2019-11-23 20:40:09,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:09,527 INFO L225 Difference]: With dead ends: 568 [2019-11-23 20:40:09,527 INFO L226 Difference]: Without dead ends: 447 [2019-11-23 20:40:09,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:40:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-23 20:40:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 439. [2019-11-23 20:40:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2019-11-23 20:40:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 558 transitions. [2019-11-23 20:40:09,535 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 558 transitions. Word has length 312 [2019-11-23 20:40:09,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:09,535 INFO L462 AbstractCegarLoop]: Abstraction has 439 states and 558 transitions. [2019-11-23 20:40:09,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:40:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 558 transitions. [2019-11-23 20:40:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-11-23 20:40:09,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:09,537 INFO L410 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:09,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:09,743 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:09,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1932750348, now seen corresponding path program 36 times [2019-11-23 20:40:09,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:09,744 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484170701] [2019-11-23 20:40:09,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 3744 trivial. 0 not checked. [2019-11-23 20:40:10,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484170701] [2019-11-23 20:40:10,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949783565] [2019-11-23 20:40:10,950 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true