/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_find_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:26:13,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:26:13,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:26:13,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:26:13,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:26:13,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:26:13,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:26:13,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:26:13,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:26:13,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:26:13,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:26:13,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:26:13,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:26:13,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:26:13,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:26:13,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:26:13,661 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:26:13,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:26:13,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:26:13,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:26:13,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:26:13,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:26:13,678 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:26:13,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:26:13,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:26:13,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:26:13,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:26:13,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:26:13,694 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 20:26:13,718 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:26:13,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:26:13,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:26:13,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:26:13,722 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:26:13,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:26:13,722 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:26:13,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:26:13,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:26:13,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:26:13,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:26:13,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:26:13,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:26:13,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:26:13,725 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:26:13,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:26:13,725 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:26:13,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:26:13,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:26:13,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:26:13,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:26:13,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:26:13,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:26:13,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:26:13,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:26:13,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:26:13,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:26:13,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:26:13,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:26:13,729 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:26:13,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:26:14,011 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:26:14,015 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:26:14,016 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:26:14,017 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:26:14,017 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_find_ground-1.i [2019-11-23 20:26:14,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8056e8eec/aed953ec9163431b816f008d0b8eb2ab/FLAG00105df24 [2019-11-23 20:26:14,508 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:26:14,509 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_find_ground-1.i [2019-11-23 20:26:14,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8056e8eec/aed953ec9163431b816f008d0b8eb2ab/FLAG00105df24 [2019-11-23 20:26:14,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8056e8eec/aed953ec9163431b816f008d0b8eb2ab [2019-11-23 20:26:14,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:26:14,883 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:26:14,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:26:14,885 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:26:14,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:26:14,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:26:14" (1/1) ... [2019-11-23 20:26:14,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f7578f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:14, skipping insertion in model container [2019-11-23 20:26:14,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:26:14" (1/1) ... [2019-11-23 20:26:14,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:26:14,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:26:15,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:26:15,162 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:26:15,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:26:15,198 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:26:15,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15 WrapperNode [2019-11-23 20:26:15,199 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:26:15,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:26:15,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:26:15,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:26:15,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:26:15,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:26:15,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:26:15,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:26:15,337 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,339 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,351 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (1/1) ... [2019-11-23 20:26:15,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:26:15,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:26:15,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:26:15,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:26:15,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (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 20:26:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:26:15,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:26:15,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:26:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:26:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:26:15,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:26:15,687 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:26:15,687 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:26:15,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:26:15 BoogieIcfgContainer [2019-11-23 20:26:15,689 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:26:15,696 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:26:15,696 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:26:15,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:26:15,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:26:14" (1/3) ... [2019-11-23 20:26:15,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e09e4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:26:15, skipping insertion in model container [2019-11-23 20:26:15,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:26:15" (2/3) ... [2019-11-23 20:26:15,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e09e4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:26:15, skipping insertion in model container [2019-11-23 20:26:15,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:26:15" (3/3) ... [2019-11-23 20:26:15,712 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_find_ground-1.i [2019-11-23 20:26:15,730 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:26:15,736 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:26:15,747 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:26:15,772 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:26:15,774 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:26:15,774 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:26:15,774 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:26:15,774 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:26:15,775 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:26:15,775 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:26:15,775 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:26:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 20:26:15,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:26:15,794 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:15,795 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:15,795 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:15,800 INFO L82 PathProgramCache]: Analyzing trace with hash 227193477, now seen corresponding path program 1 times [2019-11-23 20:26:15,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:15,808 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134140479] [2019-11-23 20:26:15,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:15,922 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 20:26:15,923 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134140479] [2019-11-23 20:26:15,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:26:15,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:26:15,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276079198] [2019-11-23 20:26:15,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:26:15,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:15,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:26:15,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:26:15,943 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-11-23 20:26:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:15,958 INFO L93 Difference]: Finished difference Result 32 states and 44 transitions. [2019-11-23 20:26:15,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:26:15,959 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:26:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:15,968 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:26:15,968 INFO L226 Difference]: Without dead ends: 14 [2019-11-23 20:26:15,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:26:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-23 20:26:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-23 20:26:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-23 20:26:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2019-11-23 20:26:16,007 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2019-11-23 20:26:16,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:16,007 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2019-11-23 20:26:16,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:26:16,008 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2019-11-23 20:26:16,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:26:16,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:16,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:16,009 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:16,010 INFO L82 PathProgramCache]: Analyzing trace with hash 280143166, now seen corresponding path program 1 times [2019-11-23 20:26:16,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:16,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165365211] [2019-11-23 20:26:16,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:16,123 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 20:26:16,124 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165365211] [2019-11-23 20:26:16,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:26:16,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:26:16,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727210512] [2019-11-23 20:26:16,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:26:16,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:16,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:26:16,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:26:16,129 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2019-11-23 20:26:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:16,165 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-11-23 20:26:16,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:26:16,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:26:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:16,168 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:26:16,168 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:26:16,170 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 20:26:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:26:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 20:26:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:26:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:26:16,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2019-11-23 20:26:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:16,179 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:26:16,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:26:16,179 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:26:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:26:16,181 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:16,182 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:16,182 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:16,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:16,182 INFO L82 PathProgramCache]: Analyzing trace with hash -375054400, now seen corresponding path program 1 times [2019-11-23 20:26:16,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:16,184 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846132707] [2019-11-23 20:26:16,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:26:16,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846132707] [2019-11-23 20:26:16,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318375514] [2019-11-23 20:26:16,312 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 20:26:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:16,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:26:16,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:26:16,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:16,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:26:16,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227226114] [2019-11-23 20:26:16,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:26:16,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:16,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:26:16,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:26:16,428 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2019-11-23 20:26:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:16,460 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 20:26:16,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:26:16,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-23 20:26:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:16,461 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:26:16,462 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:26:16,462 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 20:26:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:26:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-23 20:26:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:26:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:26:16,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2019-11-23 20:26:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:16,467 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:26:16,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:26:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:26:16,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:26:16,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:16,469 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:16,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:16,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:16,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:16,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1340277186, now seen corresponding path program 2 times [2019-11-23 20:26:16,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:16,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694780195] [2019-11-23 20:26:16,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:16,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:26:16,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694780195] [2019-11-23 20:26:16,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942205205] [2019-11-23 20:26:16,739 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 20:26:16,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:26:16,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:16,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:26:16,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:26:16,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:26:16,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-11-23 20:26:16,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923776885] [2019-11-23 20:26:16,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:26:16,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:26:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:26:16,824 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-11-23 20:26:16,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:16,850 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2019-11-23 20:26:16,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:26:16,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-23 20:26:16,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:16,851 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:26:16,852 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:26:16,852 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:26:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:26:16,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:26:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:26:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-23 20:26:16,857 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2019-11-23 20:26:16,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:16,857 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-23 20:26:16,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:26:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-23 20:26:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:26:16,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:16,859 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:17,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:17,063 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash 356036201, now seen corresponding path program 1 times [2019-11-23 20:26:17,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:17,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464947877] [2019-11-23 20:26:17,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:26:17,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464947877] [2019-11-23 20:26:17,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121688707] [2019-11-23 20:26:17,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:26:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:17,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:26:17,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:26:17,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:17,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:26:17,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400700286] [2019-11-23 20:26:17,220 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:26:17,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:17,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:26:17,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:26:17,220 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2019-11-23 20:26:17,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:17,257 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-11-23 20:26:17,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:26:17,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:26:17,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:17,259 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:26:17,259 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:26:17,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 20:26:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:26:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 20:26:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:26:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-23 20:26:17,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2019-11-23 20:26:17,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:17,269 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-23 20:26:17,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:26:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-23 20:26:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:26:17,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:17,270 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:17,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:17,474 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1212039769, now seen corresponding path program 2 times [2019-11-23 20:26:17,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:17,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135456882] [2019-11-23 20:26:17,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:26:17,578 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135456882] [2019-11-23 20:26:17,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606132119] [2019-11-23 20:26:17,579 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 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 20:26:17,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:17,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:17,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:26:17,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:17,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:26:17,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:17,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:26:17,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308460281] [2019-11-23 20:26:17,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:26:17,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:17,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:26:17,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:26:17,645 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 7 states. [2019-11-23 20:26:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:17,689 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2019-11-23 20:26:17,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:26:17,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 20:26:17,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:17,693 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:26:17,693 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:26:17,693 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:26:17,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:26:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 20:26:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:26:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:26:17,700 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 19 [2019-11-23 20:26:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:17,700 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:26:17,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:26:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:26:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:26:17,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:17,702 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:17,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:17,903 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:17,904 INFO L82 PathProgramCache]: Analyzing trace with hash -599526043, now seen corresponding path program 3 times [2019-11-23 20:26:17,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:17,904 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189302470] [2019-11-23 20:26:17,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:26:17,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189302470] [2019-11-23 20:26:17,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776590519] [2019-11-23 20:26:17,989 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 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 20:26:18,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:26:18,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:18,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:26:18,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:18,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:26:18,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:18,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 20:26:18,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725578319] [2019-11-23 20:26:18,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:26:18,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:26:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:26:18,160 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 12 states. [2019-11-23 20:26:18,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:18,500 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2019-11-23 20:26:18,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:26:18,501 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-23 20:26:18,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:18,502 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:26:18,502 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:26:18,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:26:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:26:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-23 20:26:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:26:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-11-23 20:26:18,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-11-23 20:26:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:18,517 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-11-23 20:26:18,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:26:18,518 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-11-23 20:26:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:26:18,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:18,518 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:18,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:18,722 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:18,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:18,722 INFO L82 PathProgramCache]: Analyzing trace with hash 295703461, now seen corresponding path program 1 times [2019-11-23 20:26:18,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:18,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303766355] [2019-11-23 20:26:18,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:26:18,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303766355] [2019-11-23 20:26:18,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:26:18,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:26:18,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121972163] [2019-11-23 20:26:18,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:26:18,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:18,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:26:18,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:26:18,764 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-11-23 20:26:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:18,778 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 20:26:18,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:26:18,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:26:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:18,782 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:26:18,782 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:26:18,782 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 20:26:18,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:26:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:26:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:26:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-23 20:26:18,787 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2019-11-23 20:26:18,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:18,787 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-23 20:26:18,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:26:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-23 20:26:18,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:26:18,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:18,788 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:18,789 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2108322791, now seen corresponding path program 1 times [2019-11-23 20:26:18,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:18,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784318783] [2019-11-23 20:26:18,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:26:18,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784318783] [2019-11-23 20:26:18,898 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959717611] [2019-11-23 20:26:18,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:26:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:18,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:26:18,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:26:18,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:18,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:26:18,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314407694] [2019-11-23 20:26:18,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:26:18,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:18,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:26:18,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:26:18,970 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-11-23 20:26:19,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:19,005 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-11-23 20:26:19,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:26:19,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-23 20:26:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:19,006 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:26:19,006 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:26:19,007 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:26:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:26:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-23 20:26:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:26:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-23 20:26:19,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2019-11-23 20:26:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:19,013 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-23 20:26:19,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:26:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-23 20:26:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:26:19,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:19,014 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:19,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:19,218 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:19,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:19,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1015339561, now seen corresponding path program 2 times [2019-11-23 20:26:19,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:19,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806595635] [2019-11-23 20:26:19,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:26:19,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806595635] [2019-11-23 20:26:19,320 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548758693] [2019-11-23 20:26:19,320 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 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 20:26:19,376 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:19,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:19,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:26:19,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:26:19,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:19,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:26:19,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060413502] [2019-11-23 20:26:19,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:26:19,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:19,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:26:19,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:26:19,397 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2019-11-23 20:26:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:19,440 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-11-23 20:26:19,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:26:19,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-23 20:26:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:19,441 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:26:19,441 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:26:19,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:26:19,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:26:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-11-23 20:26:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:26:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-11-23 20:26:19,448 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2019-11-23 20:26:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:19,450 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-11-23 20:26:19,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:26:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-11-23 20:26:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 20:26:19,452 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:19,452 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:19,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:19,653 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:19,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:19,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1369524245, now seen corresponding path program 3 times [2019-11-23 20:26:19,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:19,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093276929] [2019-11-23 20:26:19,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:26:19,734 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093276929] [2019-11-23 20:26:19,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448700084] [2019-11-23 20:26:19,735 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 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 20:26:19,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:26:19,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:19,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:26:19,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:26:19,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:19,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-23 20:26:19,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621898968] [2019-11-23 20:26:19,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:26:19,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:19,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:26:19,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:19,830 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 14 states. [2019-11-23 20:26:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:20,015 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-23 20:26:20,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:26:20,016 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-23 20:26:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:20,017 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:26:20,017 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 20:26:20,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:26:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 20:26:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 20:26:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:26:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-23 20:26:20,022 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2019-11-23 20:26:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:20,023 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-23 20:26:20,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:26:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-23 20:26:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:26:20,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:20,024 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:20,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:20,234 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:20,234 INFO L82 PathProgramCache]: Analyzing trace with hash -277178908, now seen corresponding path program 4 times [2019-11-23 20:26:20,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:20,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939696668] [2019-11-23 20:26:20,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:26:20,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939696668] [2019-11-23 20:26:20,333 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595942905] [2019-11-23 20:26:20,333 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 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 20:26:20,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:20,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:20,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:26:20,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:26:20,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:20,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:26:20,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490349370] [2019-11-23 20:26:20,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:26:20,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:26:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:26:20,399 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-11-23 20:26:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:20,442 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2019-11-23 20:26:20,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:26:20,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-23 20:26:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:20,443 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:26:20,443 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:26:20,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 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 20:26:20,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:26:20,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-11-23 20:26:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:26:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-11-23 20:26:20,448 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2019-11-23 20:26:20,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:20,448 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-11-23 20:26:20,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:26:20,449 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-11-23 20:26:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:26:20,449 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:20,449 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:20,652 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:20,653 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1527976422, now seen corresponding path program 5 times [2019-11-23 20:26:20,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:20,654 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294485909] [2019-11-23 20:26:20,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:26:20,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294485909] [2019-11-23 20:26:20,805 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932688201] [2019-11-23 20:26:20,806 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 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 20:26:20,895 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-23 20:26:20,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:20,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:26:20,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:26:20,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:20,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:26:20,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905796287] [2019-11-23 20:26:20,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:26:20,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:20,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:26:20,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:26:20,917 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 13 states. [2019-11-23 20:26:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:20,962 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2019-11-23 20:26:20,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:26:20,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-11-23 20:26:20,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:20,963 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:26:20,963 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:26:20,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:26:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:26:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-23 20:26:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 20:26:20,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-23 20:26:20,968 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 38 [2019-11-23 20:26:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:20,969 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-23 20:26:20,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:26:20,969 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-23 20:26:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:26:20,970 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:20,970 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:21,170 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:21,171 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1115460968, now seen corresponding path program 6 times [2019-11-23 20:26:21,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:21,172 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219681983] [2019-11-23 20:26:21,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:26:21,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219681983] [2019-11-23 20:26:21,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349626472] [2019-11-23 20:26:21,307 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 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 20:26:21,361 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:26:21,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:21,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:26:21,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:21,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:26:21,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:21,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2019-11-23 20:26:21,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485132310] [2019-11-23 20:26:21,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:26:21,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:26:21,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:26:21,626 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 22 states. [2019-11-23 20:26:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:22,091 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2019-11-23 20:26:22,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:26:22,092 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2019-11-23 20:26:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:22,093 INFO L225 Difference]: With dead ends: 71 [2019-11-23 20:26:22,093 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:26:22,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:26:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:26:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48. [2019-11-23 20:26:22,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:26:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-11-23 20:26:22,099 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 40 [2019-11-23 20:26:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:22,100 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-11-23 20:26:22,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:26:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-11-23 20:26:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:26:22,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:22,101 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:22,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:22,305 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:22,306 INFO L82 PathProgramCache]: Analyzing trace with hash -2001675424, now seen corresponding path program 7 times [2019-11-23 20:26:22,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:22,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140509401] [2019-11-23 20:26:22,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:26:22,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140509401] [2019-11-23 20:26:22,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832166393] [2019-11-23 20:26:22,424 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 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 20:26:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:22,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:26:22,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:26:22,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:22,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:26:22,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609587855] [2019-11-23 20:26:22,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:26:22,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:22,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:26:22,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:22,486 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 15 states. [2019-11-23 20:26:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:22,531 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2019-11-23 20:26:22,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:26:22,535 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2019-11-23 20:26:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:22,536 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:26:22,536 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:26:22,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:26:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:26:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-11-23 20:26:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:26:22,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-11-23 20:26:22,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 46 [2019-11-23 20:26:22,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:22,542 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-11-23 20:26:22,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:26:22,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-11-23 20:26:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:26:22,543 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:22,544 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:22,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:22,748 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:22,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:22,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1185397986, now seen corresponding path program 8 times [2019-11-23 20:26:22,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:22,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472213834] [2019-11-23 20:26:22,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:26:22,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472213834] [2019-11-23 20:26:22,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644197720] [2019-11-23 20:26:22,877 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 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 20:26:22,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:22,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:22,930 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:26:22,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:26:22,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:22,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:26:22,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065723989] [2019-11-23 20:26:22,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:26:22,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:22,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:26:22,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:22,982 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2019-11-23 20:26:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:23,040 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2019-11-23 20:26:23,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:26:23,042 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2019-11-23 20:26:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:23,043 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:26:23,043 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:26:23,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:26:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:26:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-11-23 20:26:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:26:23,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-23 20:26:23,049 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 48 [2019-11-23 20:26:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:23,049 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-23 20:26:23,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:26:23,049 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-23 20:26:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:26:23,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:23,050 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:23,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:23,254 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:23,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262948, now seen corresponding path program 9 times [2019-11-23 20:26:23,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:23,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100919104] [2019-11-23 20:26:23,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:26:23,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100919104] [2019-11-23 20:26:23,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705343783] [2019-11-23 20:26:23,436 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 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 20:26:23,487 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:26:23,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:23,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:26:23,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-11-23 20:26:23,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:23,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 22 [2019-11-23 20:26:23,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400979290] [2019-11-23 20:26:23,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:26:23,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:23,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:26:23,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:26:23,612 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 22 states. [2019-11-23 20:26:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:24,015 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2019-11-23 20:26:24,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:26:24,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 50 [2019-11-23 20:26:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:24,017 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:26:24,017 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:26:24,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:26:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:26:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:26:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:26:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-23 20:26:24,023 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2019-11-23 20:26:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:24,023 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-23 20:26:24,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:26:24,023 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-23 20:26:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:26:24,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:24,024 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:24,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:24,235 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:24,236 INFO L82 PathProgramCache]: Analyzing trace with hash 54619549, now seen corresponding path program 10 times [2019-11-23 20:26:24,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:24,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518809155] [2019-11-23 20:26:24,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:24,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518809155] [2019-11-23 20:26:24,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164927095] [2019-11-23 20:26:24,424 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 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 20:26:24,477 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:24,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:24,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:26:24,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:24,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:24,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:26:24,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100154333] [2019-11-23 20:26:24,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:26:24,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:26:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:24,513 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 18 states. [2019-11-23 20:26:24,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:24,569 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2019-11-23 20:26:24,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:26:24,569 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-11-23 20:26:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:24,570 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:26:24,570 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:26:24,571 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:26:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:26:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2019-11-23 20:26:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:26:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:26:24,575 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2019-11-23 20:26:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:24,576 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:26:24,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:26:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:26:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:26:24,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:24,577 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:24,780 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:24,781 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash 868425307, now seen corresponding path program 11 times [2019-11-23 20:26:24,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:24,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903849615] [2019-11-23 20:26:24,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:24,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903849615] [2019-11-23 20:26:24,986 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620819142] [2019-11-23 20:26:24,986 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 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 20:26:25,213 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:26:25,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:25,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:26:25,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:25,234 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:25,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:25,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:26:25,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916387569] [2019-11-23 20:26:25,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:26:25,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:26:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:25,237 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2019-11-23 20:26:25,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:25,291 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2019-11-23 20:26:25,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:26:25,292 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2019-11-23 20:26:25,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:25,292 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:26:25,292 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:26:25,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:26:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2019-11-23 20:26:25,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:26:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2019-11-23 20:26:25,297 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2019-11-23 20:26:25,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:25,297 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2019-11-23 20:26:25,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:26:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2019-11-23 20:26:25,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:26:25,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:25,298 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:25,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:25,503 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1251710873, now seen corresponding path program 12 times [2019-11-23 20:26:25,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:25,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416103290] [2019-11-23 20:26:25,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:25,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416103290] [2019-11-23 20:26:25,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851939666] [2019-11-23 20:26:25,699 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 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 20:26:25,770 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:26:25,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:25,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:26:25,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:26,706 WARN L192 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-23 20:26:27,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-11-23 20:26:27,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:27,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2019-11-23 20:26:27,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170146213] [2019-11-23 20:26:27,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:26:27,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:26:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=778, Unknown=1, NotChecked=0, Total=992 [2019-11-23 20:26:27,132 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 32 states. [2019-11-23 20:26:29,077 WARN L192 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2019-11-23 20:26:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:29,321 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2019-11-23 20:26:29,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:26:29,322 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 59 [2019-11-23 20:26:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:29,323 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:26:29,323 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 20:26:29,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=565, Invalid=1984, Unknown=1, NotChecked=0, Total=2550 [2019-11-23 20:26:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 20:26:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2019-11-23 20:26:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:26:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:26:29,330 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2019-11-23 20:26:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:29,330 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:26:29,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:26:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:26:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:26:29,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:29,331 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:29,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:29,534 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash -789164907, now seen corresponding path program 1 times [2019-11-23 20:26:29,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:29,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711472043] [2019-11-23 20:26:29,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:29,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711472043] [2019-11-23 20:26:29,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061026305] [2019-11-23 20:26:29,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:26:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:29,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:26:29,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:29,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:29,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:26:29,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208661163] [2019-11-23 20:26:29,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:26:29,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:29,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:26:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:26:29,799 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 21 states. [2019-11-23 20:26:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:29,863 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-23 20:26:29,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:26:29,864 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2019-11-23 20:26:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:29,864 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:26:29,865 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:26:29,865 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 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 20:26:29,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:26:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-11-23 20:26:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:26:29,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2019-11-23 20:26:29,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 61 [2019-11-23 20:26:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:29,869 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2019-11-23 20:26:29,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:26:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2019-11-23 20:26:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:26:29,870 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:29,870 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:30,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:30,073 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:30,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:30,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1750333139, now seen corresponding path program 2 times [2019-11-23 20:26:30,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:30,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788940988] [2019-11-23 20:26:30,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:30,312 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:30,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788940988] [2019-11-23 20:26:30,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943675000] [2019-11-23 20:26:30,313 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 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 20:26:30,363 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:30,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:30,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:26:30,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:30,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:30,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 20:26:30,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244864432] [2019-11-23 20:26:30,393 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:26:30,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:26:30,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:26:30,393 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 22 states. [2019-11-23 20:26:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:30,453 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2019-11-23 20:26:30,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:26:30,455 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2019-11-23 20:26:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:30,455 INFO L225 Difference]: With dead ends: 100 [2019-11-23 20:26:30,455 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:26:30,456 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:26:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:26:30,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-11-23 20:26:30,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:26:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2019-11-23 20:26:30,460 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 63 [2019-11-23 20:26:30,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:30,460 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2019-11-23 20:26:30,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:26:30,460 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2019-11-23 20:26:30,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:26:30,461 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:30,461 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:30,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:30,665 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:30,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:30,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1628436079, now seen corresponding path program 3 times [2019-11-23 20:26:30,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:30,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297221545] [2019-11-23 20:26:30,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 20:26:30,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297221545] [2019-11-23 20:26:30,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817179136] [2019-11-23 20:26:30,893 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 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 20:26:30,943 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:26:30,943 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:30,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:26:30,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:31,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2019-11-23 20:26:31,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:31,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2019-11-23 20:26:31,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081885759] [2019-11-23 20:26:31,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:26:31,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:26:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:26:31,025 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 27 states. [2019-11-23 20:26:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:31,536 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2019-11-23 20:26:31,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:26:31,537 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 65 [2019-11-23 20:26:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:31,538 INFO L225 Difference]: With dead ends: 102 [2019-11-23 20:26:31,538 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:26:31,539 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=795, Invalid=1755, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:26:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:26:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:26:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:26:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-11-23 20:26:31,544 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2019-11-23 20:26:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:31,545 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-11-23 20:26:31,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:26:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-11-23 20:26:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:26:31,546 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:31,546 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:31,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:31,755 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:31,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:31,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1480401262, now seen corresponding path program 13 times [2019-11-23 20:26:31,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:31,757 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951329957] [2019-11-23 20:26:31,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:26:31,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951329957] [2019-11-23 20:26:31,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137968487] [2019-11-23 20:26:32,000 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 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 20:26:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:32,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:26:32,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:26:32,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:32,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:26:32,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111841669] [2019-11-23 20:26:32,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:26:32,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:32,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:26:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:26:32,072 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 24 states. [2019-11-23 20:26:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:32,135 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2019-11-23 20:26:32,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:26:32,136 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 70 [2019-11-23 20:26:32,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:32,137 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:26:32,137 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:26:32,137 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:26:32,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:26:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 20:26:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:26:32,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-23 20:26:32,141 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 70 [2019-11-23 20:26:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:32,142 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-23 20:26:32,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:26:32,142 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-23 20:26:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 20:26:32,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:32,143 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:32,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:32,346 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:32,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:32,346 INFO L82 PathProgramCache]: Analyzing trace with hash -135407084, now seen corresponding path program 14 times [2019-11-23 20:26:32,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:32,347 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841073386] [2019-11-23 20:26:32,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:32,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:26:32,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841073386] [2019-11-23 20:26:32,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866888348] [2019-11-23 20:26:32,673 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 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 20:26:32,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:32,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:32,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:26:32,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:26:32,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:32,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 20:26:32,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143966735] [2019-11-23 20:26:32,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:26:32,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:26:32,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:26:32,748 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 25 states. [2019-11-23 20:26:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:32,834 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2019-11-23 20:26:32,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 20:26:32,835 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2019-11-23 20:26:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:32,836 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:26:32,836 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:26:32,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:26:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:26:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 20:26:32,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:26:32,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2019-11-23 20:26:32,840 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 72 [2019-11-23 20:26:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:32,840 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2019-11-23 20:26:32,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:26:32,840 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2019-11-23 20:26:32,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:26:32,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:32,841 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:33,044 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:33,044 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:33,045 INFO L82 PathProgramCache]: Analyzing trace with hash -381158122, now seen corresponding path program 15 times [2019-11-23 20:26:33,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:33,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414620559] [2019-11-23 20:26:33,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 20:26:33,387 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414620559] [2019-11-23 20:26:33,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658731101] [2019-11-23 20:26:33,390 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 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 20:26:33,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:26:33,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:33,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:26:33,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:33,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2019-11-23 20:26:33,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:33,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 36 [2019-11-23 20:26:33,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746973202] [2019-11-23 20:26:33,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:26:33,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:26:33,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:26:33,881 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 36 states. [2019-11-23 20:26:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:34,867 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2019-11-23 20:26:34,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:26:34,868 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2019-11-23 20:26:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:34,868 INFO L225 Difference]: With dead ends: 115 [2019-11-23 20:26:34,869 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:26:34,870 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=942, Invalid=2840, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:26:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:26:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2019-11-23 20:26:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:26:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-11-23 20:26:34,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 74 [2019-11-23 20:26:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:34,876 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-11-23 20:26:34,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:26:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-11-23 20:26:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:26:34,877 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:34,877 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:35,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:35,081 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:35,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:35,081 INFO L82 PathProgramCache]: Analyzing trace with hash -824198258, now seen corresponding path program 16 times [2019-11-23 20:26:35,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:35,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73877129] [2019-11-23 20:26:35,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:35,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73877129] [2019-11-23 20:26:35,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738658404] [2019-11-23 20:26:35,401 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 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 20:26:35,482 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:35,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:35,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 20:26:35,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:35,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:35,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-11-23 20:26:35,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228184399] [2019-11-23 20:26:35,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:26:35,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:35,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:26:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:26:35,529 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 27 states. [2019-11-23 20:26:35,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:35,615 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2019-11-23 20:26:35,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:26:35,615 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 80 [2019-11-23 20:26:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:35,616 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:26:35,616 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:26:35,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 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 20:26:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:26:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-23 20:26:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:26:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2019-11-23 20:26:35,620 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 80 [2019-11-23 20:26:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:35,621 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2019-11-23 20:26:35,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:26:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2019-11-23 20:26:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:26:35,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:35,622 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:35,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:35,825 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1240448144, now seen corresponding path program 17 times [2019-11-23 20:26:35,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:35,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300523074] [2019-11-23 20:26:35,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:36,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300523074] [2019-11-23 20:26:36,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064436821] [2019-11-23 20:26:36,160 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 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 20:26:36,482 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-11-23 20:26:36,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:36,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:26:36,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:36,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:36,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 20:26:36,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551578288] [2019-11-23 20:26:36,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:26:36,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:36,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:26:36,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:26:36,509 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 28 states. [2019-11-23 20:26:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:36,595 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2019-11-23 20:26:36,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:26:36,595 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2019-11-23 20:26:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:36,596 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:26:36,596 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:26:36,597 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:26:36,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:26:36,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2019-11-23 20:26:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:26:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2019-11-23 20:26:36,600 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2019-11-23 20:26:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:36,601 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2019-11-23 20:26:36,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:26:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2019-11-23 20:26:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:26:36,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:36,602 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:36,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:36,802 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:36,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1090749714, now seen corresponding path program 18 times [2019-11-23 20:26:36,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:36,803 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116680511] [2019-11-23 20:26:36,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:37,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116680511] [2019-11-23 20:26:37,294 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367983385] [2019-11-23 20:26:37,295 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 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 20:26:37,387 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:26:37,388 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:37,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 20:26:37,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:38,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-11-23 20:26:38,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:38,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17] total 43 [2019-11-23 20:26:38,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384789360] [2019-11-23 20:26:38,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:26:38,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:38,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:26:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1379, Unknown=1, NotChecked=0, Total=1806 [2019-11-23 20:26:38,581 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 43 states. [2019-11-23 20:26:40,462 WARN L192 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2019-11-23 20:26:41,425 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2019-11-23 20:26:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:41,872 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2019-11-23 20:26:41,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:26:41,873 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2019-11-23 20:26:41,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:41,874 INFO L225 Difference]: With dead ends: 161 [2019-11-23 20:26:41,874 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:26:41,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1219, Invalid=4328, Unknown=3, NotChecked=0, Total=5550 [2019-11-23 20:26:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:26:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2019-11-23 20:26:41,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-23 20:26:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-23 20:26:41,881 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2019-11-23 20:26:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:41,881 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-23 20:26:41,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:26:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-23 20:26:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-23 20:26:41,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:41,882 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:42,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:42,084 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1265301842, now seen corresponding path program 4 times [2019-11-23 20:26:42,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:42,085 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165429307] [2019-11-23 20:26:42,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:42,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165429307] [2019-11-23 20:26:42,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270284393] [2019-11-23 20:26:42,439 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 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 20:26:42,500 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:42,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:42,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:26:42,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 724 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:42,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:42,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:26:42,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552939719] [2019-11-23 20:26:42,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:26:42,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:26:42,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:26:42,521 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 30 states. [2019-11-23 20:26:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:42,632 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2019-11-23 20:26:42,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:26:42,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 86 [2019-11-23 20:26:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:42,633 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:26:42,633 INFO L226 Difference]: Without dead ends: 94 [2019-11-23 20:26:42,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:26:42,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-23 20:26:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-11-23 20:26:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 20:26:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-11-23 20:26:42,640 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 86 [2019-11-23 20:26:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:42,640 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-11-23 20:26:42,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:26:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-11-23 20:26:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:26:42,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:42,641 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:42,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:42,845 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1971146540, now seen corresponding path program 5 times [2019-11-23 20:26:42,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:42,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681796641] [2019-11-23 20:26:42,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:26:43,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681796641] [2019-11-23 20:26:43,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092034521] [2019-11-23 20:26:43,205 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 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 20:26:44,216 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-11-23 20:26:44,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:44,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:26:44,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:44,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2019-11-23 20:26:44,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:44,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 8] total 36 [2019-11-23 20:26:44,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768263052] [2019-11-23 20:26:44,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:26:44,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:44,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:26:44,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=803, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:26:44,316 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 36 states. [2019-11-23 20:26:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:45,081 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-23 20:26:45,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:26:45,086 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 88 [2019-11-23 20:26:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:45,087 INFO L225 Difference]: With dead ends: 132 [2019-11-23 20:26:45,087 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:26:45,089 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1477, Invalid=3215, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:26:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:26:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-11-23 20:26:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:26:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2019-11-23 20:26:45,093 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2019-11-23 20:26:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:45,093 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2019-11-23 20:26:45,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:26:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2019-11-23 20:26:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:26:45,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:45,094 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:45,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:45,298 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:45,299 INFO L82 PathProgramCache]: Analyzing trace with hash -711097001, now seen corresponding path program 19 times [2019-11-23 20:26:45,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:45,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497837078] [2019-11-23 20:26:45,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:26:45,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497837078] [2019-11-23 20:26:45,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224669154] [2019-11-23 20:26:45,814 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 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 20:26:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:45,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:26:45,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:26:45,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:45,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:26:45,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835493035] [2019-11-23 20:26:45,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:26:45,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:45,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:26:45,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:26:45,957 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 32 states. [2019-11-23 20:26:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:46,104 INFO L93 Difference]: Finished difference Result 134 states and 140 transitions. [2019-11-23 20:26:46,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:26:46,105 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 93 [2019-11-23 20:26:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:46,106 INFO L225 Difference]: With dead ends: 134 [2019-11-23 20:26:46,106 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:26:46,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:26:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:26:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-23 20:26:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:26:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2019-11-23 20:26:46,117 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 93 [2019-11-23 20:26:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:46,118 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2019-11-23 20:26:46,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:26:46,118 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2019-11-23 20:26:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:26:46,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:46,119 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:46,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:46,324 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:46,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1980938133, now seen corresponding path program 20 times [2019-11-23 20:26:46,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:46,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104693078] [2019-11-23 20:26:46,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:26:46,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104693078] [2019-11-23 20:26:46,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510757496] [2019-11-23 20:26:46,897 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 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 20:26:46,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:46,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:46,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:26:46,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:26:46,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:46,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:26:46,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924922785] [2019-11-23 20:26:46,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:26:46,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:26:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:26:46,992 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 33 states. [2019-11-23 20:26:47,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:47,093 INFO L93 Difference]: Finished difference Result 136 states and 142 transitions. [2019-11-23 20:26:47,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:26:47,094 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 95 [2019-11-23 20:26:47,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:47,095 INFO L225 Difference]: With dead ends: 136 [2019-11-23 20:26:47,095 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:26:47,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:26:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:26:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-23 20:26:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:26:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2019-11-23 20:26:47,099 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 95 [2019-11-23 20:26:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:47,100 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2019-11-23 20:26:47,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:26:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2019-11-23 20:26:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:26:47,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:47,101 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:47,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:47,304 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:47,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:47,305 INFO L82 PathProgramCache]: Analyzing trace with hash -838577581, now seen corresponding path program 21 times [2019-11-23 20:26:47,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:47,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895240388] [2019-11-23 20:26:47,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-11-23 20:26:47,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895240388] [2019-11-23 20:26:47,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933115305] [2019-11-23 20:26:47,822 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 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 20:26:47,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:26:47,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:47,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:26:47,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:48,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2019-11-23 20:26:48,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:48,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 15] total 46 [2019-11-23 20:26:48,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732949446] [2019-11-23 20:26:48,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:26:48,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:48,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:26:48,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:26:48,404 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 46 states. [2019-11-23 20:26:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:49,820 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2019-11-23 20:26:49,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:26:49,821 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 97 [2019-11-23 20:26:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:49,821 INFO L225 Difference]: With dead ends: 145 [2019-11-23 20:26:49,822 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:26:49,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1637, Invalid=4843, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 20:26:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:26:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2019-11-23 20:26:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 20:26:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2019-11-23 20:26:49,827 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 97 [2019-11-23 20:26:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:49,827 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2019-11-23 20:26:49,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:26:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2019-11-23 20:26:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:26:49,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:49,828 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:50,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:50,032 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:50,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1589306631, now seen corresponding path program 22 times [2019-11-23 20:26:50,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:50,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654850031] [2019-11-23 20:26:50,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:50,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:26:50,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654850031] [2019-11-23 20:26:50,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158302492] [2019-11-23 20:26:50,495 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 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 20:26:50,567 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:50,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:50,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:26:50,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:26:50,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:50,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:26:50,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415817285] [2019-11-23 20:26:50,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:26:50,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:50,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:26:50,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:26:50,596 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 35 states. [2019-11-23 20:26:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:50,730 INFO L93 Difference]: Finished difference Result 148 states and 154 transitions. [2019-11-23 20:26:50,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:26:50,731 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2019-11-23 20:26:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:50,732 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:26:50,732 INFO L226 Difference]: Without dead ends: 108 [2019-11-23 20:26:50,734 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:26:50,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-23 20:26:50,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-23 20:26:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-23 20:26:50,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2019-11-23 20:26:50,741 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2019-11-23 20:26:50,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:50,742 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2019-11-23 20:26:50,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:26:50,742 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2019-11-23 20:26:50,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:26:50,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:50,743 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:50,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:50,947 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1799152069, now seen corresponding path program 23 times [2019-11-23 20:26:50,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:50,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015046766] [2019-11-23 20:26:50,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:26:51,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015046766] [2019-11-23 20:26:51,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150010598] [2019-11-23 20:26:51,606 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 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 20:26:52,756 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-11-23 20:26:52,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:52,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:26:52,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:52,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:26:52,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:52,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:26:52,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968306801] [2019-11-23 20:26:52,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:26:52,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:52,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:26:52,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:26:52,784 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 36 states. [2019-11-23 20:26:52,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:52,874 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2019-11-23 20:26:52,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:26:52,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 105 [2019-11-23 20:26:52,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:52,876 INFO L225 Difference]: With dead ends: 150 [2019-11-23 20:26:52,876 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:26:52,877 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:26:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:26:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-23 20:26:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-23 20:26:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2019-11-23 20:26:52,882 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 105 [2019-11-23 20:26:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:52,882 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2019-11-23 20:26:52,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:26:52,883 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2019-11-23 20:26:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-11-23 20:26:52,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:52,884 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:53,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:53,090 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1597155075, now seen corresponding path program 24 times [2019-11-23 20:26:53,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:53,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892711764] [2019-11-23 20:26:53,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 20:26:53,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892711764] [2019-11-23 20:26:53,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38327764] [2019-11-23 20:26:53,876 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:26:53,978 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:26:53,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:53,979 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:26:53,983 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:54,539 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:26:54,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1166 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 20:26:54,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:54,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 15] total 49 [2019-11-23 20:26:54,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37263098] [2019-11-23 20:26:54,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:26:54,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:26:54,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=1670, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:26:54,644 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 49 states. [2019-11-23 20:26:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:57,588 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2019-11-23 20:26:57,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:26:57,588 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 107 [2019-11-23 20:26:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:57,589 INFO L225 Difference]: With dead ends: 178 [2019-11-23 20:26:57,589 INFO L226 Difference]: Without dead ends: 115 [2019-11-23 20:26:57,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 20:26:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-23 20:26:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-11-23 20:26:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-23 20:26:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2019-11-23 20:26:57,595 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2019-11-23 20:26:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:57,596 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2019-11-23 20:26:57,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:26:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2019-11-23 20:26:57,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 20:26:57,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:57,597 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:57,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:57,797 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1266746438, now seen corresponding path program 25 times [2019-11-23 20:26:57,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:57,798 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490675083] [2019-11-23 20:26:57,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:26:58,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490675083] [2019-11-23 20:26:58,505 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556993556] [2019-11-23 20:26:58,505 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 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 20:26:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:58,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:26:58,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:26:58,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:58,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:26:58,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796521696] [2019-11-23 20:26:58,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:26:58,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:26:58,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:26:58,625 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand 38 states. [2019-11-23 20:26:58,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:58,737 INFO L93 Difference]: Finished difference Result 160 states and 166 transitions. [2019-11-23 20:26:58,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:26:58,738 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 112 [2019-11-23 20:26:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:58,738 INFO L225 Difference]: With dead ends: 160 [2019-11-23 20:26:58,739 INFO L226 Difference]: Without dead ends: 117 [2019-11-23 20:26:58,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:26:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-23 20:26:58,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2019-11-23 20:26:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 20:26:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2019-11-23 20:26:58,744 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 112 [2019-11-23 20:26:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:58,744 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2019-11-23 20:26:58,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:26:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2019-11-23 20:26:58,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-11-23 20:26:58,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:58,745 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:58,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:58,949 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1023773508, now seen corresponding path program 26 times [2019-11-23 20:26:58,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:58,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8185694] [2019-11-23 20:26:58,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:26:59,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8185694] [2019-11-23 20:26:59,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414032192] [2019-11-23 20:26:59,508 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 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 20:26:59,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:59,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:59,597 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:26:59,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1320 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:26:59,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:59,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-11-23 20:26:59,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024292175] [2019-11-23 20:26:59,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 20:26:59,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:59,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 20:26:59,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:26:59,630 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 39 states. [2019-11-23 20:26:59,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:59,763 INFO L93 Difference]: Finished difference Result 162 states and 168 transitions. [2019-11-23 20:26:59,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:26:59,764 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 114 [2019-11-23 20:26:59,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:59,764 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:26:59,765 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:26:59,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 20:26:59,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:26:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2019-11-23 20:26:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:26:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2019-11-23 20:26:59,770 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 114 [2019-11-23 20:26:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:59,770 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2019-11-23 20:26:59,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 20:26:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2019-11-23 20:26:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-23 20:26:59,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:59,771 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:59,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:59,976 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:59,976 INFO L82 PathProgramCache]: Analyzing trace with hash 544978238, now seen corresponding path program 27 times [2019-11-23 20:26:59,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:59,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730781872] [2019-11-23 20:26:59,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:27:00,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730781872] [2019-11-23 20:27:00,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810561514] [2019-11-23 20:27:00,558 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 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 20:27:00,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:27:00,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:00,618 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:27:00,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:01,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:27:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1391 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 1298 trivial. 0 not checked. [2019-11-23 20:27:01,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:01,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 19] total 56 [2019-11-23 20:27:01,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003412738] [2019-11-23 20:27:01,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:27:01,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:27:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=2281, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:27:01,590 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 56 states. [2019-11-23 20:27:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:04,144 INFO L93 Difference]: Finished difference Result 192 states and 199 transitions. [2019-11-23 20:27:04,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:27:04,145 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2019-11-23 20:27:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:04,146 INFO L225 Difference]: With dead ends: 192 [2019-11-23 20:27:04,146 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:27:04,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2306, Invalid=7006, Unknown=0, NotChecked=0, Total=9312 [2019-11-23 20:27:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:27:04,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 125. [2019-11-23 20:27:04,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:27:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2019-11-23 20:27:04,153 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 116 [2019-11-23 20:27:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:04,153 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2019-11-23 20:27:04,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:27:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2019-11-23 20:27:04,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-23 20:27:04,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:04,155 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:04,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:04,359 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash 800739966, now seen corresponding path program 6 times [2019-11-23 20:27:04,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:04,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966432655] [2019-11-23 20:27:04,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 20:27:04,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966432655] [2019-11-23 20:27:04,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084952445] [2019-11-23 20:27:04,970 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 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 20:27:05,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:27:05,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:05,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:27:05,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:05,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:27:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2019-11-23 20:27:05,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:05,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 10] total 48 [2019-11-23 20:27:05,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608425724] [2019-11-23 20:27:05,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:27:05,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:05,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:27:05,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=817, Invalid=1439, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:27:05,296 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 48 states. [2019-11-23 20:27:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:06,517 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:27:06,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-23 20:27:06,517 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 118 [2019-11-23 20:27:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:06,518 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:27:06,518 INFO L226 Difference]: Without dead ends: 156 [2019-11-23 20:27:06,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1292 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2673, Invalid=5883, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 20:27:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-23 20:27:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 129. [2019-11-23 20:27:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:27:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2019-11-23 20:27:06,525 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 118 [2019-11-23 20:27:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:06,525 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2019-11-23 20:27:06,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:27:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2019-11-23 20:27:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:27:06,526 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:06,526 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:06,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:06,727 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:06,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:06,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1853615447, now seen corresponding path program 7 times [2019-11-23 20:27:06,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:06,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219642018] [2019-11-23 20:27:06,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 20:27:07,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219642018] [2019-11-23 20:27:07,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330437805] [2019-11-23 20:27:07,374 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 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 20:27:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:07,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:27:07,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 20:27:07,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:07,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:27:07,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684663461] [2019-11-23 20:27:07,498 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:27:07,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:07,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:27:07,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:27:07,499 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 42 states. [2019-11-23 20:27:07,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:07,636 INFO L93 Difference]: Finished difference Result 182 states and 188 transitions. [2019-11-23 20:27:07,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:27:07,637 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 123 [2019-11-23 20:27:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:07,637 INFO L225 Difference]: With dead ends: 182 [2019-11-23 20:27:07,637 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 20:27:07,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:27:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 20:27:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-11-23 20:27:07,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-11-23 20:27:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2019-11-23 20:27:07,644 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 123 [2019-11-23 20:27:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:07,644 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2019-11-23 20:27:07,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:27:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2019-11-23 20:27:07,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 20:27:07,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:07,645 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:07,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:07,848 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:07,849 INFO L82 PathProgramCache]: Analyzing trace with hash 464396053, now seen corresponding path program 8 times [2019-11-23 20:27:07,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:07,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472242021] [2019-11-23 20:27:07,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:07,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 20:27:08,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472242021] [2019-11-23 20:27:08,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290686746] [2019-11-23 20:27:08,520 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 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 20:27:08,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:08,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:08,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:27:08,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 20:27:08,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:08,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 20:27:08,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616875613] [2019-11-23 20:27:08,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:27:08,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:08,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:27:08,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:27:08,646 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 43 states. [2019-11-23 20:27:08,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:08,771 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2019-11-23 20:27:08,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:27:08,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 125 [2019-11-23 20:27:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:08,773 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:27:08,773 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:27:08,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:27:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:27:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-11-23 20:27:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-23 20:27:08,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2019-11-23 20:27:08,780 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 125 [2019-11-23 20:27:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:08,782 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2019-11-23 20:27:08,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:27:08,782 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2019-11-23 20:27:08,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:27:08,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:08,783 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:08,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:08,987 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1159387475, now seen corresponding path program 9 times [2019-11-23 20:27:08,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:08,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015548238] [2019-11-23 20:27:08,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-11-23 20:27:09,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015548238] [2019-11-23 20:27:09,678 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666275390] [2019-11-23 20:27:09,678 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 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 20:27:09,743 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:27:09,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:09,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:27:09,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:09,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:27:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1716 backedges. 86 proven. 77 refuted. 0 times theorem prover too weak. 1553 trivial. 0 not checked. [2019-11-23 20:27:10,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:10,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 13] total 54 [2019-11-23 20:27:10,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819405451] [2019-11-23 20:27:10,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-11-23 20:27:10,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:10,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-11-23 20:27:10,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=1892, Unknown=0, NotChecked=0, Total=2862 [2019-11-23 20:27:10,025 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 54 states. [2019-11-23 20:27:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:11,761 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2019-11-23 20:27:11,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-11-23 20:27:11,762 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 127 [2019-11-23 20:27:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:11,763 INFO L225 Difference]: With dead ends: 241 [2019-11-23 20:27:11,763 INFO L226 Difference]: Without dead ends: 191 [2019-11-23 20:27:11,764 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3232, Invalid=7274, Unknown=0, NotChecked=0, Total=10506 [2019-11-23 20:27:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-23 20:27:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 140. [2019-11-23 20:27:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-23 20:27:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2019-11-23 20:27:11,771 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 127 [2019-11-23 20:27:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:11,771 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2019-11-23 20:27:11,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-11-23 20:27:11,772 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2019-11-23 20:27:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-23 20:27:11,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:11,772 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:11,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:11,983 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:11,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:11,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1336377536, now seen corresponding path program 28 times [2019-11-23 20:27:11,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:11,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284730279] [2019-11-23 20:27:11,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:27:12,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284730279] [2019-11-23 20:27:12,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596161051] [2019-11-23 20:27:12,878 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 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 20:27:12,969 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:12,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:12,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 20:27:12,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1877 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:27:12,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:12,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-11-23 20:27:12,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202749402] [2019-11-23 20:27:12,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:27:12,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:12,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:27:12,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:27:13,000 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand 46 states. [2019-11-23 20:27:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:13,175 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2019-11-23 20:27:13,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:27:13,179 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 132 [2019-11-23 20:27:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:13,180 INFO L225 Difference]: With dead ends: 196 [2019-11-23 20:27:13,180 INFO L226 Difference]: Without dead ends: 143 [2019-11-23 20:27:13,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:27:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2019-11-23 20:27:13,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2019-11-23 20:27:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 20:27:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2019-11-23 20:27:13,187 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 132 [2019-11-23 20:27:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:13,187 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2019-11-23 20:27:13,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:27:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2019-11-23 20:27:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-23 20:27:13,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:13,188 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:13,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:13,392 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:13,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1210161982, now seen corresponding path program 29 times [2019-11-23 20:27:13,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:13,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421315218] [2019-11-23 20:27:13,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:27:14,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421315218] [2019-11-23 20:27:14,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966642264] [2019-11-23 20:27:14,219 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 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 20:27:25,012 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2019-11-23 20:27:25,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:25,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:27:25,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:27:25,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:25,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-11-23 20:27:25,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129988838] [2019-11-23 20:27:25,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:27:25,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:25,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:27:25,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:27:25,054 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 47 states. [2019-11-23 20:27:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:25,226 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2019-11-23 20:27:25,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:27:25,226 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 134 [2019-11-23 20:27:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:25,227 INFO L225 Difference]: With dead ends: 198 [2019-11-23 20:27:25,227 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 20:27:25,228 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:27:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 20:27:25,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-11-23 20:27:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 20:27:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2019-11-23 20:27:25,234 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 134 [2019-11-23 20:27:25,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:25,234 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2019-11-23 20:27:25,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:27:25,234 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2019-11-23 20:27:25,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-23 20:27:25,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:25,235 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:25,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:25,446 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:25,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:25,447 INFO L82 PathProgramCache]: Analyzing trace with hash -303280060, now seen corresponding path program 30 times [2019-11-23 20:27:25,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:25,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356646477] [2019-11-23 20:27:25,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-11-23 20:27:26,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356646477] [2019-11-23 20:27:26,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977151819] [2019-11-23 20:27:26,293 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 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 20:27:26,445 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:27:26,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:26,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-23 20:27:26,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:27,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:27:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2049 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 1936 trivial. 0 not checked. [2019-11-23 20:27:27,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:27,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 19] total 64 [2019-11-23 20:27:27,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144340720] [2019-11-23 20:27:27,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:27:27,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:27:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=2904, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:27:27,409 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 64 states. [2019-11-23 20:27:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:30,201 INFO L93 Difference]: Finished difference Result 225 states and 234 transitions. [2019-11-23 20:27:30,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-23 20:27:30,202 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 136 [2019-11-23 20:27:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:30,203 INFO L225 Difference]: With dead ends: 225 [2019-11-23 20:27:30,203 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 20:27:30,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3293, Invalid=8697, Unknown=0, NotChecked=0, Total=11990 [2019-11-23 20:27:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 20:27:30,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2019-11-23 20:27:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 20:27:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2019-11-23 20:27:30,210 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 136 [2019-11-23 20:27:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:30,211 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2019-11-23 20:27:30,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 20:27:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2019-11-23 20:27:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-11-23 20:27:30,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:30,212 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 9, 8, 8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:30,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:30,416 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:30,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:30,416 INFO L82 PathProgramCache]: Analyzing trace with hash -7787858, now seen corresponding path program 10 times [2019-11-23 20:27:30,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:30,417 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458489626] [2019-11-23 20:27:30,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:27:31,909 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458489626] [2019-11-23 20:27:31,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478097973] [2019-11-23 20:27:31,910 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 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 20:27:32,006 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:32,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:32,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 20:27:32,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2165 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:27:32,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:32,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-11-23 20:27:32,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086325643] [2019-11-23 20:27:32,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:27:32,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:27:32,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:27:32,040 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand 49 states. [2019-11-23 20:27:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:32,228 INFO L93 Difference]: Finished difference Result 202 states and 208 transitions. [2019-11-23 20:27:32,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-11-23 20:27:32,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 140 [2019-11-23 20:27:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:32,229 INFO L225 Difference]: With dead ends: 202 [2019-11-23 20:27:32,229 INFO L226 Difference]: Without dead ends: 149 [2019-11-23 20:27:32,230 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:27:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-23 20:27:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2019-11-23 20:27:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-11-23 20:27:32,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2019-11-23 20:27:32,236 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 140 [2019-11-23 20:27:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:32,236 INFO L462 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2019-11-23 20:27:32,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:27:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2019-11-23 20:27:32,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-23 20:27:32,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:32,238 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 9, 8, 8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:32,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:32,441 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:32,442 INFO L82 PathProgramCache]: Analyzing trace with hash -316347216, now seen corresponding path program 11 times [2019-11-23 20:27:32,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:32,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599306124] [2019-11-23 20:27:32,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:27:33,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599306124] [2019-11-23 20:27:33,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197573389] [2019-11-23 20:27:33,462 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 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