/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:18:54,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:18:54,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:18:54,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:18:54,123 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:18:54,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:18:54,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:18:54,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:18:54,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:18:54,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:18:54,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:18:54,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:18:54,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:18:54,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:18:54,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:18:54,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:18:54,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:18:54,155 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:18:54,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:18:54,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:18:54,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:18:54,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:18:54,172 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:18:54,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:18:54,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:18:54,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:18:54,187 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:18:54,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:18:54,189 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 20:18:54,211 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:18:54,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:18:54,212 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:18:54,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:18:54,213 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:18:54,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:18:54,213 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:18:54,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:18:54,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:18:54,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:18:54,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:18:54,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:18:54,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:18:54,214 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:18:54,215 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:18:54,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:18:54,219 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:18:54,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:18:54,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:18:54,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:18:54,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:18:54,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:18:54,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:18:54,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:18:54,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:18:54,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:18:54,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:18:54,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:18:54,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:18:54,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:18:54,527 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:18:54,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:18:54,554 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:18:54,555 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:18:54,556 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:18:54,556 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-11-23 20:18:54,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea09b6c1/e0959d1ccee647baa3c407e21fe5967e/FLAGfe5b23732 [2019-11-23 20:18:55,054 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:18:55,055 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-1.i [2019-11-23 20:18:55,061 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea09b6c1/e0959d1ccee647baa3c407e21fe5967e/FLAGfe5b23732 [2019-11-23 20:18:55,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ea09b6c1/e0959d1ccee647baa3c407e21fe5967e [2019-11-23 20:18:55,450 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:18:55,452 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:18:55,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:55,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:18:55,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:18:55,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449a522b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55, skipping insertion in model container [2019-11-23 20:18:55,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:18:55,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:18:55,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:55,669 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:18:55,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:18:55,706 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:18:55,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55 WrapperNode [2019-11-23 20:18:55,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:18:55,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:55,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:18:55,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:18:55,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:18:55,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:18:55,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:18:55,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:18:55,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (1/1) ... [2019-11-23 20:18:55,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:18:55,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:18:55,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:18:55,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:18:55,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (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 20:18:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:18:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:18:55,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:18:55,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:18:55,918 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:18:55,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:18:56,147 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:18:56,148 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:18:56,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:56 BoogieIcfgContainer [2019-11-23 20:18:56,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:18:56,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:18:56,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:18:56,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:18:56,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:18:55" (1/3) ... [2019-11-23 20:18:56,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48475772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:56, skipping insertion in model container [2019-11-23 20:18:56,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:18:55" (2/3) ... [2019-11-23 20:18:56,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48475772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:18:56, skipping insertion in model container [2019-11-23 20:18:56,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:18:56" (3/3) ... [2019-11-23 20:18:56,158 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-1.i [2019-11-23 20:18:56,174 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:18:56,184 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:18:56,215 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:18:56,243 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:18:56,243 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:18:56,243 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:18:56,243 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:18:56,243 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:18:56,243 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:18:56,244 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:18:56,244 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:18:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:18:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:18:56,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,269 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,270 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2019-11-23 20:18:56,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,286 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454549994] [2019-11-23 20:18:56,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,430 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 20:18:56,431 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454549994] [2019-11-23 20:18:56,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:56,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:56,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880124851] [2019-11-23 20:18:56,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:56,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:56,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:56,456 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 20:18:56,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:56,492 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2019-11-23 20:18:56,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:56,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:18:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:56,505 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:18:56,505 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:18:56,508 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 20:18:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:18:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:18:56,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:18:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:18:56,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-11-23 20:18:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:56,555 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:18:56,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:56,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:18:56,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:18:56,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,557 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2019-11-23 20:18:56,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496121883] [2019-11-23 20:18:56,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:56,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496121883] [2019-11-23 20:18:56,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:56,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:56,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844419866] [2019-11-23 20:18:56,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:56,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:56,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:56,672 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2019-11-23 20:18:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:56,699 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-11-23 20:18:56,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:56,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:18:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:56,700 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:18:56,701 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:18:56,702 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 20:18:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:18:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:18:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:18:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-23 20:18:56,707 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2019-11-23 20:18:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:56,708 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-23 20:18:56,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-23 20:18:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:18:56,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,709 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,709 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2019-11-23 20:18:56,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51107732] [2019-11-23 20:18:56,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:18:56,761 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51107732] [2019-11-23 20:18:56,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:18:56,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:18:56,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521379904] [2019-11-23 20:18:56,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:18:56,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:18:56,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:18:56,763 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2019-11-23 20:18:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:56,806 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2019-11-23 20:18:56,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:18:56,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:18:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:56,810 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:18:56,810 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:18:56,810 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 20:18:56,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:18:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:18:56,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:18:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 20:18:56,821 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2019-11-23 20:18:56,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:56,822 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 20:18:56,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:18:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 20:18:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:18:56,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:56,823 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:56,823 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2019-11-23 20:18:56,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:56,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069555679] [2019-11-23 20:18:56,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,884 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 20:18:56,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069555679] [2019-11-23 20:18:56,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267653197] [2019-11-23 20:18:56,885 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 20:18:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:56,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:56,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:56,985 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 20:18:56,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:56,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:18:56,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818529536] [2019-11-23 20:18:56,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:18:56,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:56,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:18:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:18:56,988 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-11-23 20:18:57,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,015 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2019-11-23 20:18:57,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:18:57,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-23 20:18:57,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,017 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:18:57,017 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:18:57,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 20:18:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:18:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-23 20:18:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:18:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 20:18:57,023 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2019-11-23 20:18:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,023 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 20:18:57,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:18:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 20:18:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:18:57,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,024 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,239 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,239 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,240 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2019-11-23 20:18:57,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,241 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074463135] [2019-11-23 20:18:57,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:57,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074463135] [2019-11-23 20:18:57,321 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883571045] [2019-11-23 20:18:57,322 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 20:18:57,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:18:57,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,389 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:57,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:57,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:18:57,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942989509] [2019-11-23 20:18:57,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:18:57,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:18:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:57,405 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 6 states. [2019-11-23 20:18:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,433 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2019-11-23 20:18:57,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:18:57,434 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:18:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,435 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:18:57,435 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:18:57,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:18:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:18:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:18:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:18:57,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:18:57,441 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2019-11-23 20:18:57,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,442 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:18:57,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:18:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:18:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:18:57,443 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,443 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:57,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:57,649 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:57,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1396986023, now seen corresponding path program 3 times [2019-11-23 20:18:57,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:57,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524006494] [2019-11-23 20:18:57,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:18:57,770 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524006494] [2019-11-23 20:18:57,771 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845091420] [2019-11-23 20:18:57,771 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 20:18:57,809 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:18:57,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:57,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:18:57,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:18:57,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:57,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:18:57,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35451335] [2019-11-23 20:18:57,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:57,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:57,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:57,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:57,840 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2019-11-23 20:18:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:57,904 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2019-11-23 20:18:57,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:18:57,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:18:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:57,908 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:18:57,908 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:18:57,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:18:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-11-23 20:18:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:18:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-11-23 20:18:57,914 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2019-11-23 20:18:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:57,914 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-11-23 20:18:57,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-11-23 20:18:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:18:57,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:57,916 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,119 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,120 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1870344925, now seen corresponding path program 4 times [2019-11-23 20:18:58,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,121 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003880646] [2019-11-23 20:18:58,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:18:58,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003880646] [2019-11-23 20:18:58,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213228669] [2019-11-23 20:18:58,195 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,244 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:18:58,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:58,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:18:58,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:18:58,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:18:58,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273682331] [2019-11-23 20:18:58,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:18:58,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:18:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:18:58,267 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 8 states. [2019-11-23 20:18:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:58,299 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-11-23 20:18:58,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:18:58,299 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-23 20:18:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:58,300 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:18:58,300 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:18:58,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 20:18:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:18:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 20:18:58,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:18:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-23 20:18:58,312 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 26 [2019-11-23 20:18:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,312 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-23 20:18:58,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:18:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-23 20:18:58,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:18:58,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,313 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:58,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,519 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:58,519 INFO L82 PathProgramCache]: Analyzing trace with hash 243034463, now seen corresponding path program 5 times [2019-11-23 20:18:58,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:58,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899622761] [2019-11-23 20:18:58,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:18:58,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899622761] [2019-11-23 20:18:58,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887111395] [2019-11-23 20:18:58,627 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:58,682 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:18:58,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:58,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:18:58,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:18:58,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:58,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:18:58,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081160169] [2019-11-23 20:18:58,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:58,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:58,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:58,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:58,731 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 11 states. [2019-11-23 20:18:58,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:58,817 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-11-23 20:18:58,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:18:58,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-23 20:18:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:58,819 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:18:58,819 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:18:58,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:58,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:18:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2019-11-23 20:18:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:18:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2019-11-23 20:18:58,830 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 28 [2019-11-23 20:18:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:58,831 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2019-11-23 20:18:58,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2019-11-23 20:18:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:18:58,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:58,833 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:59,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,035 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:59,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:59,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1982159585, now seen corresponding path program 6 times [2019-11-23 20:18:59,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:59,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697786564] [2019-11-23 20:18:59,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:18:59,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697786564] [2019-11-23 20:18:59,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17160464] [2019-11-23 20:18:59,122 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,178 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:18:59,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:18:59,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:18:59,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:18:59,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520201575] [2019-11-23 20:18:59,254 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:18:59,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:18:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:59,255 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 13 states. [2019-11-23 20:18:59,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,352 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2019-11-23 20:18:59,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:18:59,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-23 20:18:59,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,354 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:18:59,354 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:18:59,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:18:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:18:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-11-23 20:18:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:18:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-23 20:18:59,361 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 33 [2019-11-23 20:18:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:59,361 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-23 20:18:59,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:18:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-23 20:18:59,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:18:59,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:59,363 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:18:59,566 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,566 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:18:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:18:59,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1236783971, now seen corresponding path program 7 times [2019-11-23 20:18:59,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:18:59,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272979983] [2019-11-23 20:18:59,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:18:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:59,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272979983] [2019-11-23 20:18:59,681 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097797698] [2019-11-23 20:18:59,681 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:18:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:18:59,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:18:59,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:18:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:18:59,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:18:59,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:18:59,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150511957] [2019-11-23 20:18:59,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:18:59,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:18:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:18:59,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:18:59,757 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 11 states. [2019-11-23 20:18:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:18:59,798 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-11-23 20:18:59,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:18:59,799 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 20:18:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:18:59,799 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:18:59,800 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:18:59,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 20:18:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:18:59,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 20:18:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:18:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2019-11-23 20:18:59,806 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 38 [2019-11-23 20:18:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:18:59,806 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2019-11-23 20:18:59,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:18:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2019-11-23 20:18:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:18:59,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:18:59,808 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,012 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,013 INFO L82 PathProgramCache]: Analyzing trace with hash 824268517, now seen corresponding path program 8 times [2019-11-23 20:19:00,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051023696] [2019-11-23 20:19:00,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:19:00,157 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051023696] [2019-11-23 20:19:00,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319095377] [2019-11-23 20:19:00,158 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,210 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:00,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:00,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:19:00,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:19:00,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194586071] [2019-11-23 20:19:00,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:19:00,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:19:00,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:19:00,245 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 12 states. [2019-11-23 20:19:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:00,287 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2019-11-23 20:19:00,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:19:00,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2019-11-23 20:19:00,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:00,289 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:19:00,289 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:19:00,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 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 20:19:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:19:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:19:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:19:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2019-11-23 20:19:00,295 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 40 [2019-11-23 20:19:00,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:00,295 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2019-11-23 20:19:00,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:19:00,295 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2019-11-23 20:19:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:19:00,296 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:00,296 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:00,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,498 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -466091545, now seen corresponding path program 9 times [2019-11-23 20:19:00,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:00,499 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740487896] [2019-11-23 20:19:00,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:19:00,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740487896] [2019-11-23 20:19:00,631 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979667350] [2019-11-23 20:19:00,631 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:00,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:19:00,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:00,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:19:00,673 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:00,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:19:00,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:00,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-11-23 20:19:00,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625291512] [2019-11-23 20:19:00,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:19:00,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:00,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:19:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:00,874 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 21 states. [2019-11-23 20:19:01,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:01,477 INFO L93 Difference]: Finished difference Result 115 states and 145 transitions. [2019-11-23 20:19:01,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:19:01,477 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2019-11-23 20:19:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:01,478 INFO L225 Difference]: With dead ends: 115 [2019-11-23 20:19:01,478 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:19:01,480 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=1067, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:19:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:19:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2019-11-23 20:19:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:19:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2019-11-23 20:19:01,486 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 42 [2019-11-23 20:19:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:01,487 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2019-11-23 20:19:01,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:19:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2019-11-23 20:19:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:19:01,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:01,488 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:01,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:01,692 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:01,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:01,692 INFO L82 PathProgramCache]: Analyzing trace with hash -370160289, now seen corresponding path program 1 times [2019-11-23 20:19:01,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:01,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682111023] [2019-11-23 20:19:01,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:19:01,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682111023] [2019-11-23 20:19:01,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841415769] [2019-11-23 20:19:01,844 INFO L94 rtionOrderModulation]: Keeping assertion order 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 20:19:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:01,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:19:01,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:19:01,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:01,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:19:01,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577796990] [2019-11-23 20:19:01,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:19:01,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:19:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:19:01,963 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand 14 states. [2019-11-23 20:19:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:02,002 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2019-11-23 20:19:02,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:19:02,003 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2019-11-23 20:19:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:02,004 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:19:02,004 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:19:02,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 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 20:19:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:19:02,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-11-23 20:19:02,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:19:02,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-23 20:19:02,015 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 48 [2019-11-23 20:19:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:02,015 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-23 20:19:02,015 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:19:02,016 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-23 20:19:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:19:02,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:02,022 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:02,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,231 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:02,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:02,231 INFO L82 PathProgramCache]: Analyzing trace with hash 95704673, now seen corresponding path program 2 times [2019-11-23 20:19:02,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:02,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872730090] [2019-11-23 20:19:02,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:19:02,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872730090] [2019-11-23 20:19:02,372 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713357676] [2019-11-23 20:19:02,372 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 20:19:02,419 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:02,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:02,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:19:02,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:19:02,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:02,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:19:02,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875837857] [2019-11-23 20:19:02,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:19:02,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:02,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:19:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:19:02,459 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 15 states. [2019-11-23 20:19:02,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:02,512 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2019-11-23 20:19:02,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:19:02,513 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-11-23 20:19:02,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:02,513 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:19:02,513 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:19:02,514 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:19:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:19:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-11-23 20:19:02,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:19:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2019-11-23 20:19:02,519 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 50 [2019-11-23 20:19:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:02,520 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2019-11-23 20:19:02,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:19:02,520 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2019-11-23 20:19:02,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:19:02,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:02,521 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:02,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:02,725 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:02,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1115334371, now seen corresponding path program 3 times [2019-11-23 20:19:02,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:02,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128432806] [2019-11-23 20:19:02,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:19:02,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128432806] [2019-11-23 20:19:02,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34536792] [2019-11-23 20:19:02,879 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 20:19:02,931 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:19:02,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:02,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:19:02,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:19:03,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:03,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 20:19:03,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284152428] [2019-11-23 20:19:03,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:19:03,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:19:03,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:03,016 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 20 states. [2019-11-23 20:19:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:03,164 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2019-11-23 20:19:03,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:19:03,165 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-11-23 20:19:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:03,166 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:19:03,166 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 20:19:03,167 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 20:19:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2019-11-23 20:19:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:19:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-11-23 20:19:03,174 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 52 [2019-11-23 20:19:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:03,174 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-11-23 20:19:03,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:19:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-11-23 20:19:03,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:19:03,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:03,175 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:03,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:03,387 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash 797198985, now seen corresponding path program 4 times [2019-11-23 20:19:03,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:03,388 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409082446] [2019-11-23 20:19:03,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:19:03,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409082446] [2019-11-23 20:19:03,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137536558] [2019-11-23 20:19:03,563 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 20:19:03,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:03,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:03,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:19:03,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:19:03,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:03,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:19:03,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29986121] [2019-11-23 20:19:03,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:19:03,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:03,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:19:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:19:03,638 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 17 states. [2019-11-23 20:19:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:03,697 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-11-23 20:19:03,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:19:03,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-23 20:19:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:03,699 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:19:03,699 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:19:03,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 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 20:19:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:19:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 20:19:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:19:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2019-11-23 20:19:03,705 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 57 [2019-11-23 20:19:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:03,705 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2019-11-23 20:19:03,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:19:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2019-11-23 20:19:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:19:03,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:03,706 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:03,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:03,910 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:03,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1180484551, now seen corresponding path program 5 times [2019-11-23 20:19:03,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:03,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675464820] [2019-11-23 20:19:03,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:19:04,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675464820] [2019-11-23 20:19:04,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711191530] [2019-11-23 20:19:04,086 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 20:19:04,281 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-11-23 20:19:04,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:04,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:19:04,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-11-23 20:19:04,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:04,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2019-11-23 20:19:04,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492806775] [2019-11-23 20:19:04,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:19:04,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:04,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:19:04,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:04,390 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 23 states. [2019-11-23 20:19:04,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:04,502 INFO L93 Difference]: Finished difference Result 134 states and 168 transitions. [2019-11-23 20:19:04,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:19:04,503 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 59 [2019-11-23 20:19:04,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:04,504 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:19:04,504 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:19:04,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:04,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:19:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2019-11-23 20:19:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:19:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2019-11-23 20:19:04,512 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 59 [2019-11-23 20:19:04,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:04,512 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2019-11-23 20:19:04,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:19:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2019-11-23 20:19:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:19:04,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:04,513 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:04,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:04,719 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:04,719 INFO L82 PathProgramCache]: Analyzing trace with hash 962215913, now seen corresponding path program 6 times [2019-11-23 20:19:04,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:04,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477566108] [2019-11-23 20:19:04,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 20:19:04,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477566108] [2019-11-23 20:19:04,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504249286] [2019-11-23 20:19:04,910 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 20:19:05,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:19:05,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:05,053 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:19:05,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:05,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:05,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:05,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-23 20:19:05,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:05,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-11-23 20:19:05,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335196894] [2019-11-23 20:19:05,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:19:05,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:19:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:19:05,421 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 30 states. [2019-11-23 20:19:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:06,637 INFO L93 Difference]: Finished difference Result 176 states and 220 transitions. [2019-11-23 20:19:06,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:19:06,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2019-11-23 20:19:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:06,640 INFO L225 Difference]: With dead ends: 176 [2019-11-23 20:19:06,640 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:19:06,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=589, Invalid=2833, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:19:06,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:19:06,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2019-11-23 20:19:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:19:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2019-11-23 20:19:06,650 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 64 [2019-11-23 20:19:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:06,650 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2019-11-23 20:19:06,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:19:06,650 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2019-11-23 20:19:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:19:06,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:06,651 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:06,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:06,856 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:06,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:06,856 INFO L82 PathProgramCache]: Analyzing trace with hash 272649441, now seen corresponding path program 7 times [2019-11-23 20:19:06,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:06,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80926984] [2019-11-23 20:19:06,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:19:07,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80926984] [2019-11-23 20:19:07,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14413610] [2019-11-23 20:19:07,041 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 20:19:07,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:07,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:19:07,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:07,152 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:19:07,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:07,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:19:07,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497502968] [2019-11-23 20:19:07,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:19:07,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:07,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:19:07,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:19:07,155 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand 20 states. [2019-11-23 20:19:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:07,218 INFO L93 Difference]: Finished difference Result 148 states and 180 transitions. [2019-11-23 20:19:07,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:19:07,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 70 [2019-11-23 20:19:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:07,219 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:19:07,220 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:19:07,220 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 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 20:19:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:19:07,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-11-23 20:19:07,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:19:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2019-11-23 20:19:07,226 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 70 [2019-11-23 20:19:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:07,226 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2019-11-23 20:19:07,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:19:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2019-11-23 20:19:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:19:07,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:07,227 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:07,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:07,431 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1617643619, now seen corresponding path program 8 times [2019-11-23 20:19:07,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:07,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440273707] [2019-11-23 20:19:07,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:19:07,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440273707] [2019-11-23 20:19:07,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958990961] [2019-11-23 20:19:07,635 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 20:19:07,698 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:07,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:07,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:19:07,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:19:07,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:07,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:19:07,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036140133] [2019-11-23 20:19:07,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:19:07,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:07,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:19:07,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:07,717 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 21 states. [2019-11-23 20:19:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:07,799 INFO L93 Difference]: Finished difference Result 150 states and 182 transitions. [2019-11-23 20:19:07,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:19:07,800 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2019-11-23 20:19:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:07,801 INFO L225 Difference]: With dead ends: 150 [2019-11-23 20:19:07,801 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:19:07,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:19:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:19:07,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2019-11-23 20:19:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:19:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2019-11-23 20:19:07,807 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 72 [2019-11-23 20:19:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:07,807 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2019-11-23 20:19:07,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:19:07,807 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2019-11-23 20:19:07,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:19:07,808 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:07,808 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:08,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:08,012 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1371892581, now seen corresponding path program 9 times [2019-11-23 20:19:08,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:08,013 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137113861] [2019-11-23 20:19:08,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-23 20:19:08,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137113861] [2019-11-23 20:19:08,263 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790904670] [2019-11-23 20:19:08,263 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 20:19:08,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:19:08,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:08,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:19:08,358 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-11-23 20:19:08,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:08,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:19:08,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549691166] [2019-11-23 20:19:08,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:19:08,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:19:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:19:08,503 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 28 states. [2019-11-23 20:19:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:08,633 INFO L93 Difference]: Finished difference Result 162 states and 200 transitions. [2019-11-23 20:19:08,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:19:08,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2019-11-23 20:19:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:08,635 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:19:08,635 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:19:08,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:19:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:19:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2019-11-23 20:19:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 20:19:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2019-11-23 20:19:08,640 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 74 [2019-11-23 20:19:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:08,641 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2019-11-23 20:19:08,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:19:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2019-11-23 20:19:08,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:19:08,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:08,642 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:08,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:08,846 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:08,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2095205363, now seen corresponding path program 10 times [2019-11-23 20:19:08,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:08,847 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841484936] [2019-11-23 20:19:08,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:19:09,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841484936] [2019-11-23 20:19:09,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211848027] [2019-11-23 20:19:09,082 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 20:19:09,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:09,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:09,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:19:09,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:19:09,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:09,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:19:09,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135200631] [2019-11-23 20:19:09,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:19:09,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:19:09,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:09,175 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 23 states. [2019-11-23 20:19:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:09,244 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2019-11-23 20:19:09,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:19:09,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2019-11-23 20:19:09,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:09,247 INFO L225 Difference]: With dead ends: 166 [2019-11-23 20:19:09,247 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 20:19:09,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:19:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 20:19:09,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 20:19:09,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:19:09,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2019-11-23 20:19:09,256 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 79 [2019-11-23 20:19:09,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:09,256 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2019-11-23 20:19:09,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:19:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2019-11-23 20:19:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:19:09,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:09,257 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:09,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:09,460 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:09,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:09,461 INFO L82 PathProgramCache]: Analyzing trace with hash -886234447, now seen corresponding path program 11 times [2019-11-23 20:19:09,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:09,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994242538] [2019-11-23 20:19:09,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:09,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:19:09,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994242538] [2019-11-23 20:19:09,729 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468826049] [2019-11-23 20:19:09,729 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 20:19:09,947 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-11-23 20:19:09,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:09,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:19:09,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:10,101 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-11-23 20:19:10,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:10,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 31 [2019-11-23 20:19:10,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727715444] [2019-11-23 20:19:10,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:19:10,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:10,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:19:10,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:10,103 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand 31 states. [2019-11-23 20:19:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:10,249 INFO L93 Difference]: Finished difference Result 178 states and 220 transitions. [2019-11-23 20:19:10,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:10,249 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2019-11-23 20:19:10,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:10,250 INFO L225 Difference]: With dead ends: 178 [2019-11-23 20:19:10,250 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:19:10,251 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:19:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:19:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2019-11-23 20:19:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:19:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2019-11-23 20:19:10,256 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 81 [2019-11-23 20:19:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:10,257 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2019-11-23 20:19:10,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:19:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2019-11-23 20:19:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:19:10,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:10,258 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:10,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:10,463 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1992557291, now seen corresponding path program 12 times [2019-11-23 20:19:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:10,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472404183] [2019-11-23 20:19:10,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-11-23 20:19:10,730 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472404183] [2019-11-23 20:19:10,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123353324] [2019-11-23 20:19:10,731 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 20:19:11,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:19:11,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:11,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:19:11,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2019-11-23 20:19:11,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:11,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2019-11-23 20:19:11,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945397278] [2019-11-23 20:19:11,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:19:11,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:11,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:19:11,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:11,267 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 33 states. [2019-11-23 20:19:11,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:11,445 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2019-11-23 20:19:11,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:19:11,446 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 86 [2019-11-23 20:19:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:11,447 INFO L225 Difference]: With dead ends: 192 [2019-11-23 20:19:11,447 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:19:11,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=330, Invalid=726, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:19:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2019-11-23 20:19:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:19:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2019-11-23 20:19:11,453 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 86 [2019-11-23 20:19:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:11,453 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2019-11-23 20:19:11,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:19:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2019-11-23 20:19:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:19:11,455 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:11,455 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:11,655 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:11,656 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:11,656 INFO L82 PathProgramCache]: Analyzing trace with hash 688640429, now seen corresponding path program 13 times [2019-11-23 20:19:11,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:11,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557231571] [2019-11-23 20:19:11,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:19:11,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557231571] [2019-11-23 20:19:11,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588554632] [2019-11-23 20:19:11,926 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 20:19:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:11,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:19:11,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:19:12,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:12,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:19:12,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269173985] [2019-11-23 20:19:12,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:19:12,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:19:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:19:12,014 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand 26 states. [2019-11-23 20:19:12,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:12,094 INFO L93 Difference]: Finished difference Result 196 states and 240 transitions. [2019-11-23 20:19:12,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:19:12,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2019-11-23 20:19:12,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:12,095 INFO L225 Difference]: With dead ends: 196 [2019-11-23 20:19:12,095 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:19:12,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 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 20:19:12,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:19:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 20:19:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:19:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2019-11-23 20:19:12,102 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 91 [2019-11-23 20:19:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:12,102 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2019-11-23 20:19:12,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:19:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2019-11-23 20:19:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:19:12,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:12,103 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:12,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:12,306 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:12,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:12,307 INFO L82 PathProgramCache]: Analyzing trace with hash -452691093, now seen corresponding path program 14 times [2019-11-23 20:19:12,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:12,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896042517] [2019-11-23 20:19:12,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:19:12,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896042517] [2019-11-23 20:19:12,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898001875] [2019-11-23 20:19:12,605 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 20:19:12,668 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:12,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:12,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:19:12,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:19:12,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:12,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:19:12,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366153032] [2019-11-23 20:19:12,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:19:12,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:19:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:19:12,704 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 27 states. [2019-11-23 20:19:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:12,779 INFO L93 Difference]: Finished difference Result 198 states and 242 transitions. [2019-11-23 20:19:12,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:19:12,779 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2019-11-23 20:19:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:12,780 INFO L225 Difference]: With dead ends: 198 [2019-11-23 20:19:12,780 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 20:19:12,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:19:12,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 20:19:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-11-23 20:19:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:19:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 146 transitions. [2019-11-23 20:19:12,786 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 146 transitions. Word has length 93 [2019-11-23 20:19:12,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:12,787 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 146 transitions. [2019-11-23 20:19:12,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:19:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2019-11-23 20:19:12,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:19:12,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:12,788 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:12,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:12,991 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2055623255, now seen corresponding path program 15 times [2019-11-23 20:19:12,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:12,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587769950] [2019-11-23 20:19:12,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 20:19:13,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587769950] [2019-11-23 20:19:13,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15624101] [2019-11-23 20:19:13,306 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 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 20:19:13,383 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:19:13,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:13,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:19:13,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:13,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:13,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:13,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2019-11-23 20:19:13,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:13,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 41 [2019-11-23 20:19:13,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322910294] [2019-11-23 20:19:13,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:19:13,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:13,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:19:13,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:19:13,878 INFO L87 Difference]: Start difference. First operand 124 states and 146 transitions. Second operand 41 states. [2019-11-23 20:19:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:15,407 INFO L93 Difference]: Finished difference Result 253 states and 314 transitions. [2019-11-23 20:19:15,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 20:19:15,410 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 95 [2019-11-23 20:19:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:15,411 INFO L225 Difference]: With dead ends: 253 [2019-11-23 20:19:15,411 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:19:15,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1475 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1233, Invalid=5739, Unknown=0, NotChecked=0, Total=6972 [2019-11-23 20:19:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:19:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 130. [2019-11-23 20:19:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-23 20:19:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 152 transitions. [2019-11-23 20:19:15,420 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 152 transitions. Word has length 95 [2019-11-23 20:19:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:15,420 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 152 transitions. [2019-11-23 20:19:15,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:19:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 152 transitions. [2019-11-23 20:19:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:19:15,421 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:15,421 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:15,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:15,625 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:15,626 INFO L82 PathProgramCache]: Analyzing trace with hash 891613789, now seen corresponding path program 16 times [2019-11-23 20:19:15,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:15,627 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629578434] [2019-11-23 20:19:15,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:15,950 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:19:15,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629578434] [2019-11-23 20:19:15,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121582001] [2019-11-23 20:19:15,950 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 20:19:16,024 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:16,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:16,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:19:16,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:16,052 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:19:16,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:16,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:19:16,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380732069] [2019-11-23 20:19:16,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:19:16,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:19:16,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:16,054 INFO L87 Difference]: Start difference. First operand 130 states and 152 transitions. Second operand 29 states. [2019-11-23 20:19:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:16,152 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2019-11-23 20:19:16,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:19:16,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2019-11-23 20:19:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:16,153 INFO L225 Difference]: With dead ends: 210 [2019-11-23 20:19:16,153 INFO L226 Difference]: Without dead ends: 133 [2019-11-23 20:19:16,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:19:16,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-23 20:19:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-11-23 20:19:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-23 20:19:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2019-11-23 20:19:16,159 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 101 [2019-11-23 20:19:16,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:16,160 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2019-11-23 20:19:16,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:19:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2019-11-23 20:19:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:19:16,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:16,161 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:16,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:16,365 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -690288997, now seen corresponding path program 17 times [2019-11-23 20:19:16,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:16,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524421355] [2019-11-23 20:19:16,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:19:16,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524421355] [2019-11-23 20:19:16,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041871620] [2019-11-23 20:19:16,762 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 20:19:17,280 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-11-23 20:19:17,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:17,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:19:17,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2019-11-23 20:19:17,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:17,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 12] total 39 [2019-11-23 20:19:17,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717284599] [2019-11-23 20:19:17,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:19:17,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:19:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=1011, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:17,434 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 39 states. [2019-11-23 20:19:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:17,657 INFO L93 Difference]: Finished difference Result 222 states and 272 transitions. [2019-11-23 20:19:17,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:19:17,658 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 103 [2019-11-23 20:19:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:17,660 INFO L225 Difference]: With dead ends: 222 [2019-11-23 20:19:17,660 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:19:17,663 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=471, Invalid=1011, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:19:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2019-11-23 20:19:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:19:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 164 transitions. [2019-11-23 20:19:17,672 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 164 transitions. Word has length 103 [2019-11-23 20:19:17,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:17,673 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 164 transitions. [2019-11-23 20:19:17,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:19:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 164 transitions. [2019-11-23 20:19:17,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-11-23 20:19:17,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:17,674 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:17,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:17,882 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash -824079635, now seen corresponding path program 18 times [2019-11-23 20:19:17,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:17,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668501893] [2019-11-23 20:19:17,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-11-23 20:19:18,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668501893] [2019-11-23 20:19:18,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113399074] [2019-11-23 20:19:18,337 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 20:19:19,430 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-11-23 20:19:19,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:19,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:19:19,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2019-11-23 20:19:19,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:19,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13] total 41 [2019-11-23 20:19:19,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398395092] [2019-11-23 20:19:19,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:19:19,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:19,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:19:19,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1128, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:19:19,637 INFO L87 Difference]: Start difference. First operand 140 states and 164 transitions. Second operand 41 states. [2019-11-23 20:19:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:19,871 INFO L93 Difference]: Finished difference Result 236 states and 290 transitions. [2019-11-23 20:19:19,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:19:19,873 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 108 [2019-11-23 20:19:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:19,874 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:19:19,875 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 20:19:19,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1128, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:19:19,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 20:19:19,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2019-11-23 20:19:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:19:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 174 transitions. [2019-11-23 20:19:19,881 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 174 transitions. Word has length 108 [2019-11-23 20:19:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:19,882 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 174 transitions. [2019-11-23 20:19:19,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:19:19,882 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 174 transitions. [2019-11-23 20:19:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:19:19,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:19,883 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:20,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:20,092 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:20,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:20,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1508947561, now seen corresponding path program 19 times [2019-11-23 20:19:20,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:20,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647691284] [2019-11-23 20:19:20,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:20,488 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-23 20:19:20,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647691284] [2019-11-23 20:19:20,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950985303] [2019-11-23 20:19:20,489 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 20:19:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:20,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:19:20,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 979 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-23 20:19:20,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:20,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:19:20,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912363668] [2019-11-23 20:19:20,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:19:20,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:20,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:19:20,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:19:20,587 INFO L87 Difference]: Start difference. First operand 148 states and 174 transitions. Second operand 32 states. [2019-11-23 20:19:20,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:20,699 INFO L93 Difference]: Finished difference Result 240 states and 292 transitions. [2019-11-23 20:19:20,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:19:20,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 113 [2019-11-23 20:19:20,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:20,702 INFO L225 Difference]: With dead ends: 240 [2019-11-23 20:19:20,702 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 20:19:20,703 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 113 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 20:19:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 20:19:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2019-11-23 20:19:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 20:19:20,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 176 transitions. [2019-11-23 20:19:20,709 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 176 transitions. Word has length 113 [2019-11-23 20:19:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:20,710 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 176 transitions. [2019-11-23 20:19:20,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:19:20,710 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 176 transitions. [2019-11-23 20:19:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:19:20,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:20,711 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:20,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:20,914 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:20,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:20,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1728245973, now seen corresponding path program 20 times [2019-11-23 20:19:20,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:20,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687165355] [2019-11-23 20:19:20,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-23 20:19:21,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687165355] [2019-11-23 20:19:21,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940312095] [2019-11-23 20:19:21,530 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 20:19:21,604 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:21,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:21,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:19:21,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1036 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-23 20:19:21,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:21,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:19:21,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807676514] [2019-11-23 20:19:21,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:19:21,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:21,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:19:21,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:21,635 INFO L87 Difference]: Start difference. First operand 150 states and 176 transitions. Second operand 33 states. [2019-11-23 20:19:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:21,744 INFO L93 Difference]: Finished difference Result 242 states and 294 transitions. [2019-11-23 20:19:21,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:19:21,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 115 [2019-11-23 20:19:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:21,745 INFO L225 Difference]: With dead ends: 242 [2019-11-23 20:19:21,745 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 20:19:21,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:19:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 20:19:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2019-11-23 20:19:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 20:19:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 178 transitions. [2019-11-23 20:19:21,754 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 178 transitions. Word has length 115 [2019-11-23 20:19:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:21,755 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 178 transitions. [2019-11-23 20:19:21,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:19:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 178 transitions. [2019-11-23 20:19:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:19:21,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:21,756 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 11, 11, 11, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:21,959 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:21,960 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1180057453, now seen corresponding path program 21 times [2019-11-23 20:19:21,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:21,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330856884] [2019-11-23 20:19:21,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2019-11-23 20:19:22,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330856884] [2019-11-23 20:19:22,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595077751] [2019-11-23 20:19:22,679 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 20:19:22,966 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-11-23 20:19:22,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:22,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:19:22,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1095 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 918 trivial. 0 not checked. [2019-11-23 20:19:23,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:23,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 14] total 45 [2019-11-23 20:19:23,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127858202] [2019-11-23 20:19:23,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:19:23,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:23,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:19:23,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=1362, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:19:23,264 INFO L87 Difference]: Start difference. First operand 152 states and 178 transitions. Second operand 45 states. [2019-11-23 20:19:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:23,512 INFO L93 Difference]: Finished difference Result 254 states and 312 transitions. [2019-11-23 20:19:23,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:19:23,513 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 117 [2019-11-23 20:19:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:23,514 INFO L225 Difference]: With dead ends: 254 [2019-11-23 20:19:23,514 INFO L226 Difference]: Without dead ends: 165 [2019-11-23 20:19:23,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1362, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:19:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-11-23 20:19:23,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2019-11-23 20:19:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-23 20:19:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2019-11-23 20:19:23,523 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 117 [2019-11-23 20:19:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:23,523 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2019-11-23 20:19:23,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:19:23,523 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2019-11-23 20:19:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-23 20:19:23,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:23,524 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:23,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:23,729 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:23,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash -6987147, now seen corresponding path program 22 times [2019-11-23 20:19:23,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:23,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456971764] [2019-11-23 20:19:23,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-11-23 20:19:24,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456971764] [2019-11-23 20:19:24,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959249290] [2019-11-23 20:19:24,372 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 20:19:24,490 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:24,491 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:24,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:19:24,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-11-23 20:19:24,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:24,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:19:24,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404065791] [2019-11-23 20:19:24,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:19:24,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:24,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:19:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:19:24,553 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand 35 states. [2019-11-23 20:19:24,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:24,669 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2019-11-23 20:19:24,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:19:24,669 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2019-11-23 20:19:24,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:24,670 INFO L225 Difference]: With dead ends: 258 [2019-11-23 20:19:24,671 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:19:24,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 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 20:19:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:19:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2019-11-23 20:19:24,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-11-23 20:19:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 190 transitions. [2019-11-23 20:19:24,677 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 190 transitions. Word has length 122 [2019-11-23 20:19:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:24,677 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 190 transitions. [2019-11-23 20:19:24,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:19:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 190 transitions. [2019-11-23 20:19:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:19:24,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:24,679 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 12, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:24,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:24,882 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1298726665, now seen corresponding path program 23 times [2019-11-23 20:19:24,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:24,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552395764] [2019-11-23 20:19:24,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-11-23 20:19:25,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552395764] [2019-11-23 20:19:25,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031509431] [2019-11-23 20:19:25,571 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 20:19:27,060 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2019-11-23 20:19:27,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:27,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:19:27,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 1042 trivial. 0 not checked. [2019-11-23 20:19:27,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:27,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15] total 48 [2019-11-23 20:19:27,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180749754] [2019-11-23 20:19:27,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:19:27,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:27,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:19:27,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1557, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:19:27,332 INFO L87 Difference]: Start difference. First operand 162 states and 190 transitions. Second operand 48 states. [2019-11-23 20:19:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:27,628 INFO L93 Difference]: Finished difference Result 270 states and 332 transitions. [2019-11-23 20:19:27,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:19:27,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 124 [2019-11-23 20:19:27,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:27,630 INFO L225 Difference]: With dead ends: 270 [2019-11-23 20:19:27,630 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 20:19:27,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1557, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:19:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 20:19:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2019-11-23 20:19:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 20:19:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 200 transitions. [2019-11-23 20:19:27,638 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 200 transitions. Word has length 124 [2019-11-23 20:19:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:27,638 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 200 transitions. [2019-11-23 20:19:27,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:19:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 200 transitions. [2019-11-23 20:19:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-23 20:19:27,639 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:27,639 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 13, 13, 13, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:27,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:27,845 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2105107277, now seen corresponding path program 24 times [2019-11-23 20:19:27,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:27,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955614574] [2019-11-23 20:19:27,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:27,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1355 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2019-11-23 20:19:28,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955614574] [2019-11-23 20:19:28,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120932983] [2019-11-23 20:19:28,527 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 20:19:29,334 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:19:29,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:29,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:19:29,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:29,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:30,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:30,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:30,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1355 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2019-11-23 20:19:30,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:30,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18] total 52 [2019-11-23 20:19:30,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979997718] [2019-11-23 20:19:30,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:19:30,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:30,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:19:30,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=1961, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:19:30,368 INFO L87 Difference]: Start difference. First operand 170 states and 200 transitions. Second operand 52 states. [2019-11-23 20:19:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:33,511 INFO L93 Difference]: Finished difference Result 342 states and 424 transitions. [2019-11-23 20:19:33,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-23 20:19:33,512 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 129 [2019-11-23 20:19:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:33,514 INFO L225 Difference]: With dead ends: 342 [2019-11-23 20:19:33,514 INFO L226 Difference]: Without dead ends: 241 [2019-11-23 20:19:33,517 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2097, Invalid=9245, Unknown=0, NotChecked=0, Total=11342 [2019-11-23 20:19:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-23 20:19:33,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 176. [2019-11-23 20:19:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-23 20:19:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 206 transitions. [2019-11-23 20:19:33,525 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 206 transitions. Word has length 129 [2019-11-23 20:19:33,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:33,526 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 206 transitions. [2019-11-23 20:19:33,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:19:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 206 transitions. [2019-11-23 20:19:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-23 20:19:33,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:33,527 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:33,732 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:33,732 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:33,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:33,732 INFO L82 PathProgramCache]: Analyzing trace with hash 937739905, now seen corresponding path program 25 times [2019-11-23 20:19:33,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:33,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051476828] [2019-11-23 20:19:33,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-11-23 20:19:34,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051476828] [2019-11-23 20:19:34,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632996413] [2019-11-23 20:19:34,364 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 20:19:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:34,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:19:34,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-11-23 20:19:34,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:34,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:19:34,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54688729] [2019-11-23 20:19:34,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:19:34,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:34,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:19:34,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:34,479 INFO L87 Difference]: Start difference. First operand 176 states and 206 transitions. Second operand 38 states. [2019-11-23 20:19:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:34,599 INFO L93 Difference]: Finished difference Result 284 states and 344 transitions. [2019-11-23 20:19:34,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:19:34,599 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 135 [2019-11-23 20:19:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:34,600 INFO L225 Difference]: With dead ends: 284 [2019-11-23 20:19:34,600 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 20:19:34,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:19:34,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 20:19:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-11-23 20:19:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-23 20:19:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 208 transitions. [2019-11-23 20:19:34,608 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 208 transitions. Word has length 135 [2019-11-23 20:19:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:34,609 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 208 transitions. [2019-11-23 20:19:34,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:19:34,609 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 208 transitions. [2019-11-23 20:19:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-23 20:19:34,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:34,610 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:34,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:34,813 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1013691585, now seen corresponding path program 26 times [2019-11-23 20:19:34,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:34,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117414176] [2019-11-23 20:19:34,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-11-23 20:19:35,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117414176] [2019-11-23 20:19:35,351 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705071314] [2019-11-23 20:19:35,352 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 20:19:35,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:35,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:35,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:19:35,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1505 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-11-23 20:19:35,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:35,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:19:35,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563938219] [2019-11-23 20:19:35,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:19:35,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:19:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:35,466 INFO L87 Difference]: Start difference. First operand 178 states and 208 transitions. Second operand 39 states. [2019-11-23 20:19:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:35,607 INFO L93 Difference]: Finished difference Result 286 states and 346 transitions. [2019-11-23 20:19:35,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:19:35,608 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 137 [2019-11-23 20:19:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:35,609 INFO L225 Difference]: With dead ends: 286 [2019-11-23 20:19:35,609 INFO L226 Difference]: Without dead ends: 181 [2019-11-23 20:19:35,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:19:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-23 20:19:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2019-11-23 20:19:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-23 20:19:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 210 transitions. [2019-11-23 20:19:35,617 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 210 transitions. Word has length 137 [2019-11-23 20:19:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:35,617 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 210 transitions. [2019-11-23 20:19:35,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:19:35,618 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 210 transitions. [2019-11-23 20:19:35,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-23 20:19:35,619 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:35,619 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 13, 13, 13, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:35,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:35,822 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 561354877, now seen corresponding path program 27 times [2019-11-23 20:19:35,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:35,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826577264] [2019-11-23 20:19:35,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-11-23 20:19:36,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826577264] [2019-11-23 20:19:36,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259290069] [2019-11-23 20:19:36,400 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 20:19:36,600 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:19:36,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:36,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:19:36,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2019-11-23 20:19:36,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:36,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 16] total 53 [2019-11-23 20:19:36,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648756387] [2019-11-23 20:19:36,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 20:19:36,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:36,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 20:19:36,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=860, Invalid=1896, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:19:36,913 INFO L87 Difference]: Start difference. First operand 180 states and 210 transitions. Second operand 53 states. [2019-11-23 20:19:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:37,226 INFO L93 Difference]: Finished difference Result 298 states and 364 transitions. [2019-11-23 20:19:37,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:19:37,227 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 139 [2019-11-23 20:19:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:37,228 INFO L225 Difference]: With dead ends: 298 [2019-11-23 20:19:37,228 INFO L226 Difference]: Without dead ends: 193 [2019-11-23 20:19:37,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=860, Invalid=1896, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:19:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-23 20:19:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2019-11-23 20:19:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-23 20:19:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 220 transitions. [2019-11-23 20:19:37,235 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 220 transitions. Word has length 139 [2019-11-23 20:19:37,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:37,235 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 220 transitions. [2019-11-23 20:19:37,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 20:19:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 220 transitions. [2019-11-23 20:19:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-23 20:19:37,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:37,236 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:37,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:37,441 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash -242450313, now seen corresponding path program 28 times [2019-11-23 20:19:37,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:37,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736758879] [2019-11-23 20:19:37,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-11-23 20:19:38,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736758879] [2019-11-23 20:19:38,060 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967958806] [2019-11-23 20:19:38,061 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 20:19:38,151 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:38,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:38,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:19:38,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-11-23 20:19:38,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:38,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:19:38,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605824408] [2019-11-23 20:19:38,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:19:38,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:19:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:19:38,189 INFO L87 Difference]: Start difference. First operand 188 states and 220 transitions. Second operand 41 states. [2019-11-23 20:19:38,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:38,328 INFO L93 Difference]: Finished difference Result 302 states and 366 transitions. [2019-11-23 20:19:38,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:19:38,329 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2019-11-23 20:19:38,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:38,330 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:19:38,330 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 20:19:38,331 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:19:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 20:19:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-23 20:19:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-23 20:19:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 222 transitions. [2019-11-23 20:19:38,340 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 222 transitions. Word has length 144 [2019-11-23 20:19:38,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:38,340 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 222 transitions. [2019-11-23 20:19:38,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:19:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 222 transitions. [2019-11-23 20:19:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-23 20:19:38,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:38,342 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 14, 14, 14, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:38,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:38,547 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:38,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1200845177, now seen corresponding path program 29 times [2019-11-23 20:19:38,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:38,548 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284645304] [2019-11-23 20:19:38,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2019-11-23 20:19:39,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284645304] [2019-11-23 20:19:39,585 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587526103] [2019-11-23 20:19:39,585 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 20:19:41,572 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2019-11-23 20:19:41,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:41,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:19:41,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 1476 trivial. 0 not checked. [2019-11-23 20:19:41,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:41,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 17] total 56 [2019-11-23 20:19:41,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68494229] [2019-11-23 20:19:41,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:19:41,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:41,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:19:41,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=2125, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:19:41,915 INFO L87 Difference]: Start difference. First operand 190 states and 222 transitions. Second operand 56 states. [2019-11-23 20:19:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:42,235 INFO L93 Difference]: Finished difference Result 314 states and 384 transitions. [2019-11-23 20:19:42,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:19:42,235 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2019-11-23 20:19:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:42,236 INFO L225 Difference]: With dead ends: 314 [2019-11-23 20:19:42,236 INFO L226 Difference]: Without dead ends: 203 [2019-11-23 20:19:42,237 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=955, Invalid=2125, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:19:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-23 20:19:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2019-11-23 20:19:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-23 20:19:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 232 transitions. [2019-11-23 20:19:42,244 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 232 transitions. Word has length 146 [2019-11-23 20:19:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:42,245 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 232 transitions. [2019-11-23 20:19:42,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:19:42,245 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 232 transitions. [2019-11-23 20:19:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 20:19:42,246 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:42,246 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 15, 15, 15, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:42,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:42,454 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:42,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:42,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1750092983, now seen corresponding path program 30 times [2019-11-23 20:19:42,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:42,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545748577] [2019-11-23 20:19:42,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1884 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-11-23 20:19:43,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545748577] [2019-11-23 20:19:43,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350305336] [2019-11-23 20:19:43,132 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 [2019-11-23 20:19:46,034 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:19:46,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:46,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:19:46,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:46,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:46,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:46,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:19:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1884 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 1676 trivial. 0 not checked. [2019-11-23 20:19:46,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:46,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 20] total 60 [2019-11-23 20:19:46,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674260284] [2019-11-23 20:19:46,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-11-23 20:19:46,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:46,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-11-23 20:19:46,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:19:46,878 INFO L87 Difference]: Start difference. First operand 198 states and 232 transitions. Second operand 60 states. [2019-11-23 20:19:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:51,008 INFO L93 Difference]: Finished difference Result 395 states and 488 transitions. [2019-11-23 20:19:51,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-11-23 20:19:51,013 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 151 [2019-11-23 20:19:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:51,015 INFO L225 Difference]: With dead ends: 395 [2019-11-23 20:19:51,015 INFO L226 Difference]: Without dead ends: 278 [2019-11-23 20:19:51,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2817, Invalid=12435, Unknown=0, NotChecked=0, Total=15252 [2019-11-23 20:19:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-23 20:19:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 204. [2019-11-23 20:19:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-23 20:19:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 238 transitions. [2019-11-23 20:19:51,025 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 238 transitions. Word has length 151 [2019-11-23 20:19:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:51,025 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 238 transitions. [2019-11-23 20:19:51,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-11-23 20:19:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 238 transitions. [2019-11-23 20:19:51,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:19:51,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:51,027 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:51,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:51,231 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:51,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:51,232 INFO L82 PathProgramCache]: Analyzing trace with hash 412813419, now seen corresponding path program 31 times [2019-11-23 20:19:51,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:51,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694723052] [2019-11-23 20:19:51,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:19:52,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694723052] [2019-11-23 20:19:52,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217566552] [2019-11-23 20:19:52,033 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:52,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:19:52,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:19:52,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:52,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-11-23 20:19:52,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965830055] [2019-11-23 20:19:52,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:19:52,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:19:52,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:19:52,177 INFO L87 Difference]: Start difference. First operand 204 states and 238 transitions. Second operand 44 states. [2019-11-23 20:19:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:52,311 INFO L93 Difference]: Finished difference Result 328 states and 396 transitions. [2019-11-23 20:19:52,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:19:52,316 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 157 [2019-11-23 20:19:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:52,317 INFO L225 Difference]: With dead ends: 328 [2019-11-23 20:19:52,317 INFO L226 Difference]: Without dead ends: 207 [2019-11-23 20:19:52,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:19:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-11-23 20:19:52,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2019-11-23 20:19:52,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-23 20:19:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 240 transitions. [2019-11-23 20:19:52,328 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 240 transitions. Word has length 157 [2019-11-23 20:19:52,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:52,330 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 240 transitions. [2019-11-23 20:19:52,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:19:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 240 transitions. [2019-11-23 20:19:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-23 20:19:52,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:52,331 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:52,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:52,535 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:52,535 INFO L82 PathProgramCache]: Analyzing trace with hash -891336023, now seen corresponding path program 32 times [2019-11-23 20:19:52,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:52,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027875781] [2019-11-23 20:19:52,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:19:53,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027875781] [2019-11-23 20:19:53,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170789095] [2019-11-23 20:19:53,319 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:53,414 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:19:53,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:53,416 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:19:53,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:19:53,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:53,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-11-23 20:19:53,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463562984] [2019-11-23 20:19:53,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 20:19:53,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 20:19:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:19:53,459 INFO L87 Difference]: Start difference. First operand 206 states and 240 transitions. Second operand 45 states. [2019-11-23 20:19:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:53,619 INFO L93 Difference]: Finished difference Result 330 states and 398 transitions. [2019-11-23 20:19:53,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:19:53,619 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 159 [2019-11-23 20:19:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:53,620 INFO L225 Difference]: With dead ends: 330 [2019-11-23 20:19:53,620 INFO L226 Difference]: Without dead ends: 209 [2019-11-23 20:19:53,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 20:19:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-23 20:19:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-11-23 20:19:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-23 20:19:53,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 242 transitions. [2019-11-23 20:19:53,628 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 242 transitions. Word has length 159 [2019-11-23 20:19:53,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:53,628 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 242 transitions. [2019-11-23 20:19:53,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 20:19:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 242 transitions. [2019-11-23 20:19:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-23 20:19:53,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:53,630 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 15, 15, 15, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:53,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:53,834 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash -48499353, now seen corresponding path program 33 times [2019-11-23 20:19:53,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:53,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915117212] [2019-11-23 20:19:53,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2019-11-23 20:19:54,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915117212] [2019-11-23 20:19:54,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826368887] [2019-11-23 20:19:54,594 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:54,842 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-11-23 20:19:54,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:54,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:19:54,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2019-11-23 20:19:55,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:55,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 18] total 61 [2019-11-23 20:19:55,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319009055] [2019-11-23 20:19:55,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-11-23 20:19:55,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:55,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-11-23 20:19:55,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=2518, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 20:19:55,287 INFO L87 Difference]: Start difference. First operand 208 states and 242 transitions. Second operand 61 states. [2019-11-23 20:19:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:55,630 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2019-11-23 20:19:55,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 20:19:55,631 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 161 [2019-11-23 20:19:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:55,632 INFO L225 Difference]: With dead ends: 342 [2019-11-23 20:19:55,632 INFO L226 Difference]: Without dead ends: 221 [2019-11-23 20:19:55,633 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1142, Invalid=2518, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 20:19:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-11-23 20:19:55,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 216. [2019-11-23 20:19:55,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-23 20:19:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 252 transitions. [2019-11-23 20:19:55,641 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 252 transitions. Word has length 161 [2019-11-23 20:19:55,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:55,641 INFO L462 AbstractCegarLoop]: Abstraction has 216 states and 252 transitions. [2019-11-23 20:19:55,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-11-23 20:19:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 252 transitions. [2019-11-23 20:19:55,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:19:55,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:55,643 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:55,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:55,847 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:55,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2146933895, now seen corresponding path program 34 times [2019-11-23 20:19:55,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:55,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989840515] [2019-11-23 20:19:55,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:55,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-23 20:19:56,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989840515] [2019-11-23 20:19:56,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174158349] [2019-11-23 20:19:56,985 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:57,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:19:57,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:19:57,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:19:57,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:19:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-23 20:19:57,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:19:57,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-11-23 20:19:57,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283877160] [2019-11-23 20:19:57,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:19:57,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:19:57,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:19:57,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:19:57,220 INFO L87 Difference]: Start difference. First operand 216 states and 252 transitions. Second operand 47 states. [2019-11-23 20:19:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:19:57,402 INFO L93 Difference]: Finished difference Result 346 states and 418 transitions. [2019-11-23 20:19:57,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:19:57,403 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 166 [2019-11-23 20:19:57,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:19:57,404 INFO L225 Difference]: With dead ends: 346 [2019-11-23 20:19:57,405 INFO L226 Difference]: Without dead ends: 219 [2019-11-23 20:19:57,405 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:19:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-11-23 20:19:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2019-11-23 20:19:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2019-11-23 20:19:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2019-11-23 20:19:57,417 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 166 [2019-11-23 20:19:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:19:57,418 INFO L462 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2019-11-23 20:19:57,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:19:57,418 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2019-11-23 20:19:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:19:57,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:19:57,420 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 16, 16, 16, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:19:57,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:19:57,625 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:19:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:19:57,626 INFO L82 PathProgramCache]: Analyzing trace with hash 859293435, now seen corresponding path program 35 times [2019-11-23 20:19:57,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:19:57,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821322568] [2019-11-23 20:19:57,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:19:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:19:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2019-11-23 20:19:58,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821322568] [2019-11-23 20:19:58,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100343732] [2019-11-23 20:19:58,494 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:01,230 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2019-11-23 20:20:01,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:01,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:20:01,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1986 trivial. 0 not checked. [2019-11-23 20:20:01,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:01,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 19] total 64 [2019-11-23 20:20:01,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865085483] [2019-11-23 20:20:01,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:20:01,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:20:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1251, Invalid=2781, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:20:01,649 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand 64 states. [2019-11-23 20:20:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:02,034 INFO L93 Difference]: Finished difference Result 358 states and 436 transitions. [2019-11-23 20:20:02,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-23 20:20:02,037 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 168 [2019-11-23 20:20:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:02,038 INFO L225 Difference]: With dead ends: 358 [2019-11-23 20:20:02,038 INFO L226 Difference]: Without dead ends: 231 [2019-11-23 20:20:02,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1251, Invalid=2781, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:20:02,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-11-23 20:20:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 226. [2019-11-23 20:20:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-11-23 20:20:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 264 transitions. [2019-11-23 20:20:02,047 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 264 transitions. Word has length 168 [2019-11-23 20:20:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:02,047 INFO L462 AbstractCegarLoop]: Abstraction has 226 states and 264 transitions. [2019-11-23 20:20:02,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 20:20:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 264 transitions. [2019-11-23 20:20:02,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 20:20:02,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:02,048 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 17, 17, 17, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:02,257 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:02,257 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1077388511, now seen corresponding path program 36 times [2019-11-23 20:20:02,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:02,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943549622] [2019-11-23 20:20:02,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-11-23 20:20:03,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943549622] [2019-11-23 20:20:03,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186661711] [2019-11-23 20:20:03,287 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:14,867 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 20:20:14,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:14,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:20:14,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 90 proven. 425 refuted. 0 times theorem prover too weak. 1986 trivial. 0 not checked. [2019-11-23 20:20:15,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:15,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 22] total 68 [2019-11-23 20:20:15,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092727550] [2019-11-23 20:20:15,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-11-23 20:20:15,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-11-23 20:20:15,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1414, Invalid=3142, Unknown=0, NotChecked=0, Total=4556 [2019-11-23 20:20:15,442 INFO L87 Difference]: Start difference. First operand 226 states and 264 transitions. Second operand 68 states. [2019-11-23 20:20:16,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:16,373 INFO L93 Difference]: Finished difference Result 373 states and 456 transitions. [2019-11-23 20:20:16,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-11-23 20:20:16,373 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 173 [2019-11-23 20:20:16,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:16,374 INFO L225 Difference]: With dead ends: 373 [2019-11-23 20:20:16,375 INFO L226 Difference]: Without dead ends: 240 [2019-11-23 20:20:16,375 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1792, Invalid=5518, Unknown=0, NotChecked=0, Total=7310 [2019-11-23 20:20:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-23 20:20:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2019-11-23 20:20:16,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-11-23 20:20:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 276 transitions. [2019-11-23 20:20:16,384 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 276 transitions. Word has length 173 [2019-11-23 20:20:16,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:16,385 INFO L462 AbstractCegarLoop]: Abstraction has 236 states and 276 transitions. [2019-11-23 20:20:16,385 INFO L463 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-11-23 20:20:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 276 transitions. [2019-11-23 20:20:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-23 20:20:16,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:16,386 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:16,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:16,594 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:16,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1389188863, now seen corresponding path program 37 times [2019-11-23 20:20:16,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:16,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071208828] [2019-11-23 20:20:16,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:16,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2737 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:20:17,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071208828] [2019-11-23 20:20:17,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630571198] [2019-11-23 20:20:17,601 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:17,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:20:17,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2737 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:20:17,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:17,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2019-11-23 20:20:17,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636608321] [2019-11-23 20:20:17,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:20:17,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:20:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:20:17,761 INFO L87 Difference]: Start difference. First operand 236 states and 276 transitions. Second operand 51 states. [2019-11-23 20:20:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:17,944 INFO L93 Difference]: Finished difference Result 378 states and 458 transitions. [2019-11-23 20:20:17,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:20:17,944 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 180 [2019-11-23 20:20:17,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:17,945 INFO L225 Difference]: With dead ends: 378 [2019-11-23 20:20:17,945 INFO L226 Difference]: Without dead ends: 239 [2019-11-23 20:20:17,946 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:20:17,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2019-11-23 20:20:17,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2019-11-23 20:20:17,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2019-11-23 20:20:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 278 transitions. [2019-11-23 20:20:17,952 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 278 transitions. Word has length 180 [2019-11-23 20:20:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:17,952 INFO L462 AbstractCegarLoop]: Abstraction has 238 states and 278 transitions. [2019-11-23 20:20:17,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:20:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 278 transitions. [2019-11-23 20:20:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-11-23 20:20:17,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:17,953 INFO L410 BasicCegarLoop]: trace histogram [48, 48, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:18,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:18,155 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:18,156 INFO L82 PathProgramCache]: Analyzing trace with hash 497336579, now seen corresponding path program 38 times [2019-11-23 20:20:18,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:18,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787707954] [2019-11-23 20:20:18,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:19,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:20:19,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787707954] [2019-11-23 20:20:19,234 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494759841] [2019-11-23 20:20:19,234 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:19,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:19,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:19,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 20:20:19,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:20:19,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:19,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2019-11-23 20:20:19,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098129360] [2019-11-23 20:20:19,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:20:19,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:20:19,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:20:19,407 INFO L87 Difference]: Start difference. First operand 238 states and 278 transitions. Second operand 52 states. [2019-11-23 20:20:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:19,570 INFO L93 Difference]: Finished difference Result 380 states and 460 transitions. [2019-11-23 20:20:19,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 20:20:19,570 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 182 [2019-11-23 20:20:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:19,571 INFO L225 Difference]: With dead ends: 380 [2019-11-23 20:20:19,571 INFO L226 Difference]: Without dead ends: 241 [2019-11-23 20:20:19,572 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:20:19,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-23 20:20:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2019-11-23 20:20:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-11-23 20:20:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 280 transitions. [2019-11-23 20:20:19,580 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 280 transitions. Word has length 182 [2019-11-23 20:20:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:19,581 INFO L462 AbstractCegarLoop]: Abstraction has 240 states and 280 transitions. [2019-11-23 20:20:19,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:20:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 280 transitions. [2019-11-23 20:20:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-11-23 20:20:19,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:19,582 INFO L410 BasicCegarLoop]: trace histogram [49, 49, 18, 18, 18, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:19,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:19,786 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash 972087429, now seen corresponding path program 39 times [2019-11-23 20:20:19,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:19,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343993997] [2019-11-23 20:20:19,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-11-23 20:20:20,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343993997] [2019-11-23 20:20:20,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205333836] [2019-11-23 20:20:20,885 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:21,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-11-23 20:20:21,463 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:21,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 20:20:21,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:21,567 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:20:21,574 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:20:21,586 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:20:21,586 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:20:21,586 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-11-23 20:20:22,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:22,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:22,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 2623 trivial. 0 not checked. [2019-11-23 20:20:22,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:22,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 22] total 72 [2019-11-23 20:20:22,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081447997] [2019-11-23 20:20:22,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-23 20:20:22,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:22,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-23 20:20:22,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=3709, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:20:22,555 INFO L87 Difference]: Start difference. First operand 240 states and 280 transitions. Second operand 72 states.