/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-tiling/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:46:08,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:46:08,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:46:08,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:46:08,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:46:08,963 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:46:08,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:46:08,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:46:08,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:46:08,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:46:08,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:46:08,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:46:08,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:46:08,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:46:08,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:46:08,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:46:08,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:46:08,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:46:08,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:46:08,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:46:08,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:46:08,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:46:08,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:46:08,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:46:08,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:46:08,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:46:08,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:46:08,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:46:08,999 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 20:46:09,013 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:46:09,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:46:09,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:46:09,015 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:46:09,015 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:46:09,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:46:09,015 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:46:09,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:46:09,016 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:46:09,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:46:09,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:46:09,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:46:09,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:46:09,017 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:46:09,017 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:46:09,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:46:09,017 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:46:09,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:46:09,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:46:09,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:46:09,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:46:09,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:46:09,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:46:09,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:46:09,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:46:09,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:46:09,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:46:09,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:46:09,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:46:09,020 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:46:09,301 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:46:09,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:46:09,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:46:09,320 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:46:09,320 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:46:09,321 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2019-11-23 20:46:09,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a817c080/7f8ab839b2154b5ebdfbaf726aec2d83/FLAGddd40ca0a [2019-11-23 20:46:09,924 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:46:09,925 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2019-11-23 20:46:09,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a817c080/7f8ab839b2154b5ebdfbaf726aec2d83/FLAGddd40ca0a [2019-11-23 20:46:10,263 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a817c080/7f8ab839b2154b5ebdfbaf726aec2d83 [2019-11-23 20:46:10,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:46:10,275 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:46:10,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:46:10,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:46:10,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:46:10,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba3616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10, skipping insertion in model container [2019-11-23 20:46:10,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:46:10,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:46:10,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:46:10,513 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:46:10,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:46:10,543 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:46:10,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10 WrapperNode [2019-11-23 20:46:10,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:46:10,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:46:10,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:46:10,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:46:10,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:46:10,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:46:10,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:46:10,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:46:10,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (1/1) ... [2019-11-23 20:46:10,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:46:10,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:46:10,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:46:10,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:46:10,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (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 20:46:10,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:46:10,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:46:10,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:46:10,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:46:10,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:46:11,004 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:46:11,004 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-23 20:46:11,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:46:11 BoogieIcfgContainer [2019-11-23 20:46:11,006 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:46:11,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:46:11,013 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:46:11,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:46:11,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:46:10" (1/3) ... [2019-11-23 20:46:11,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35872d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:46:11, skipping insertion in model container [2019-11-23 20:46:11,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:46:10" (2/3) ... [2019-11-23 20:46:11,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35872d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:46:11, skipping insertion in model container [2019-11-23 20:46:11,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:46:11" (3/3) ... [2019-11-23 20:46:11,028 INFO L109 eAbstractionObserver]: Analyzing ICFG mlceu.c [2019-11-23 20:46:11,051 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:46:11,065 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:46:11,077 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:46:11,105 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:46:11,105 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:46:11,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:46:11,105 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:46:11,106 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:46:11,106 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:46:11,106 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:46:11,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:46:11,119 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-23 20:46:11,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:46:11,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:11,126 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:11,127 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:11,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:11,132 INFO L82 PathProgramCache]: Analyzing trace with hash 190929886, now seen corresponding path program 1 times [2019-11-23 20:46:11,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:11,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754872947] [2019-11-23 20:46:11,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:11,267 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 20:46:11,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754872947] [2019-11-23 20:46:11,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:46:11,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:46:11,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706885554] [2019-11-23 20:46:11,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:46:11,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:11,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:46:11,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:46:11,295 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-23 20:46:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:11,315 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2019-11-23 20:46:11,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:46:11,317 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-23 20:46:11,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:11,330 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:46:11,331 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 20:46:11,336 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 20:46:11,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 20:46:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 20:46:11,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:46:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:46:11,379 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2019-11-23 20:46:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:11,380 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:46:11,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:46:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:46:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 20:46:11,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:11,381 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:11,382 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:11,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:11,382 INFO L82 PathProgramCache]: Analyzing trace with hash 180771155, now seen corresponding path program 1 times [2019-11-23 20:46:11,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:11,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035902120] [2019-11-23 20:46:11,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:11,534 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 20:46:11,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035902120] [2019-11-23 20:46:11,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:46:11,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:46:11,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446514736] [2019-11-23 20:46:11,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:46:11,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:46:11,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:46:11,539 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-23 20:46:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:11,617 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2019-11-23 20:46:11,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:46:11,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-23 20:46:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:11,620 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:46:11,620 INFO L226 Difference]: Without dead ends: 16 [2019-11-23 20:46:11,621 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 20:46:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-23 20:46:11,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-11-23 20:46:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:46:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 20:46:11,630 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2019-11-23 20:46:11,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:11,631 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 20:46:11,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:46:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 20:46:11,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:46:11,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:11,633 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:11,634 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:11,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1553987562, now seen corresponding path program 1 times [2019-11-23 20:46:11,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:11,636 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674306835] [2019-11-23 20:46:11,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:11,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:11,881 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 20:46:11,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674306835] [2019-11-23 20:46:11,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938758400] [2019-11-23 20:46:11,883 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 20:46:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:11,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:46:11,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:12,004 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-23 20:46:12,004 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:12,008 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:12,008 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:12,009 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-23 20:46:12,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:12,065 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 20:46:12,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:12,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-23 20:46:12,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910033349] [2019-11-23 20:46:12,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:46:12,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:46:12,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:46:12,068 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 10 states. [2019-11-23 20:46:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:12,200 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-11-23 20:46:12,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:46:12,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2019-11-23 20:46:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:12,202 INFO L225 Difference]: With dead ends: 23 [2019-11-23 20:46:12,202 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:46:12,203 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:46:12,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:46:12,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2019-11-23 20:46:12,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:46:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 20:46:12,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2019-11-23 20:46:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:12,209 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 20:46:12,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:46:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 20:46:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:46:12,210 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:12,210 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:12,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:12,412 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:12,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:12,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1550708512, now seen corresponding path program 1 times [2019-11-23 20:46:12,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:12,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634549541] [2019-11-23 20:46:12,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:12,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634549541] [2019-11-23 20:46:12,494 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364342643] [2019-11-23 20:46:12,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:46:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:12,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:46:12,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:12,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:12,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-23 20:46:12,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158317011] [2019-11-23 20:46:12,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:46:12,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:46:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:46:12,620 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 10 states. [2019-11-23 20:46:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:12,749 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-11-23 20:46:12,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:46:12,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-23 20:46:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:12,750 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:46:12,751 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:46:12,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:46:12,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:46:12,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2019-11-23 20:46:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:46:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:46:12,756 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-23 20:46:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:12,757 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:46:12,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:46:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:46:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:46:12,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:12,758 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:12,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:12,962 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash 2065443433, now seen corresponding path program 2 times [2019-11-23 20:46:12,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:12,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747152347] [2019-11-23 20:46:12,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:13,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:13,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747152347] [2019-11-23 20:46:13,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316777128] [2019-11-23 20:46:13,140 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 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 20:46:13,197 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:46:13,197 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:13,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:46:13,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:13,254 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:46:13,255 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:13,262 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:13,263 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:13,263 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:46:13,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:13,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:13,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:46:13,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315643266] [2019-11-23 20:46:13,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:46:13,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:13,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:46:13,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:46:13,354 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 15 states. [2019-11-23 20:46:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:13,587 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-23 20:46:13,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:46:13,587 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2019-11-23 20:46:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:13,588 INFO L225 Difference]: With dead ends: 31 [2019-11-23 20:46:13,588 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:46:13,590 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:46:13,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:46:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2019-11-23 20:46:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:46:13,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-23 20:46:13,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2019-11-23 20:46:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:13,598 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-23 20:46:13,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:46:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-23 20:46:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 20:46:13,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:13,599 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:13,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:13,803 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash -341644321, now seen corresponding path program 3 times [2019-11-23 20:46:13,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:13,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770011718] [2019-11-23 20:46:13,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:13,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770011718] [2019-11-23 20:46:13,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579342038] [2019-11-23 20:46:13,911 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 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 20:46:13,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:46:13,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:13,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:46:13,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:14,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:14,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:46:14,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87174940] [2019-11-23 20:46:14,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:46:14,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:14,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:46:14,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:46:14,030 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 13 states. [2019-11-23 20:46:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:14,199 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2019-11-23 20:46:14,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:46:14,199 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2019-11-23 20:46:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:14,200 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:46:14,200 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:46:14,201 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:46:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:46:14,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-11-23 20:46:14,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 20:46:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-23 20:46:14,206 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2019-11-23 20:46:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:14,207 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-23 20:46:14,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:46:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-23 20:46:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:46:14,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:14,208 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:14,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:14,412 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:14,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash -105138634, now seen corresponding path program 4 times [2019-11-23 20:46:14,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:14,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99442613] [2019-11-23 20:46:14,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:14,593 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99442613] [2019-11-23 20:46:14,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826804267] [2019-11-23 20:46:14,594 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 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 20:46:14,640 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:46:14,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:14,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:46:14,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:14,707 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:46:14,707 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:14,714 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:14,715 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:14,715 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:46:14,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:14,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:14,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-23 20:46:14,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294227621] [2019-11-23 20:46:14,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:46:14,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:14,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:46:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:46:14,818 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2019-11-23 20:46:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:15,116 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2019-11-23 20:46:15,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:46:15,116 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 25 [2019-11-23 20:46:15,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:15,117 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:46:15,117 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:46:15,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:46:15,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:46:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2019-11-23 20:46:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:46:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-23 20:46:15,124 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2019-11-23 20:46:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:15,125 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-23 20:46:15,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:46:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-23 20:46:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:46:15,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:15,126 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:15,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:15,335 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:15,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1261582036, now seen corresponding path program 5 times [2019-11-23 20:46:15,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:15,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989435308] [2019-11-23 20:46:15,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:15,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989435308] [2019-11-23 20:46:15,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630967856] [2019-11-23 20:46:15,447 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 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 20:46:15,490 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:46:15,490 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:15,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:46:15,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:15,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:15,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:46:15,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12830518] [2019-11-23 20:46:15,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:46:15,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:15,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:46:15,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:46:15,568 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 16 states. [2019-11-23 20:46:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:15,726 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2019-11-23 20:46:15,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:46:15,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2019-11-23 20:46:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:15,728 INFO L225 Difference]: With dead ends: 77 [2019-11-23 20:46:15,728 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 20:46:15,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:46:15,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 20:46:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-11-23 20:46:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:46:15,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-23 20:46:15,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-23 20:46:15,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:15,735 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-23 20:46:15,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:46:15,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-23 20:46:15,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:46:15,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:15,736 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:15,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:15,946 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash 379846389, now seen corresponding path program 6 times [2019-11-23 20:46:15,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:15,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418031581] [2019-11-23 20:46:15,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:16,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418031581] [2019-11-23 20:46:16,159 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203368387] [2019-11-23 20:46:16,159 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 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 20:46:16,207 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:46:16,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:16,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:46:16,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:16,284 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:16,285 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:16,290 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:16,290 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:16,291 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-23 20:46:16,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:16,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:16,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-11-23 20:46:16,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702010312] [2019-11-23 20:46:16,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:46:16,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:46:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:46:16,645 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 25 states. [2019-11-23 20:46:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:18,120 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2019-11-23 20:46:18,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:46:18,121 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-11-23 20:46:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:18,122 INFO L225 Difference]: With dead ends: 84 [2019-11-23 20:46:18,122 INFO L226 Difference]: Without dead ends: 46 [2019-11-23 20:46:18,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:46:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-23 20:46:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-11-23 20:46:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:46:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-23 20:46:18,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2019-11-23 20:46:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:18,146 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-23 20:46:18,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:46:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-23 20:46:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:46:18,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:18,147 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:18,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:18,351 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1314259074, now seen corresponding path program 7 times [2019-11-23 20:46:18,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:18,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619995609] [2019-11-23 20:46:18,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:18,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619995609] [2019-11-23 20:46:18,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356945126] [2019-11-23 20:46:18,531 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 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 20:46:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:18,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:46:18,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:18,587 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:18,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:18,594 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:18,595 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:46:18,595 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 20:46:18,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:18,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:18,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2019-11-23 20:46:18,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475795876] [2019-11-23 20:46:18,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:46:18,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:18,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:46:18,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:46:18,733 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 19 states. [2019-11-23 20:46:19,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:19,231 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2019-11-23 20:46:19,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:46:19,231 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-11-23 20:46:19,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:19,233 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:46:19,233 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:46:19,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:46:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:46:19,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2019-11-23 20:46:19,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:46:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-23 20:46:19,241 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2019-11-23 20:46:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:19,242 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-23 20:46:19,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:46:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-23 20:46:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:46:19,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:19,243 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:19,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:19,448 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1130499448, now seen corresponding path program 8 times [2019-11-23 20:46:19,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:19,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244136069] [2019-11-23 20:46:19,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:19,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244136069] [2019-11-23 20:46:19,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615341950] [2019-11-23 20:46:19,598 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 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 20:46:19,677 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:46:19,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:19,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:46:19,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 50 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:19,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:19,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:46:19,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597904300] [2019-11-23 20:46:19,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:46:19,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:19,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:46:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:46:19,810 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 22 states. [2019-11-23 20:46:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:19,974 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2019-11-23 20:46:19,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:46:19,974 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2019-11-23 20:46:19,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:19,975 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:46:19,975 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:46:19,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:46:19,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:46:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2019-11-23 20:46:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:46:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:46:19,991 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2019-11-23 20:46:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:19,992 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:46:19,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:46:19,992 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:46:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 20:46:19,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:19,995 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:20,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:20,200 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1325535359, now seen corresponding path program 9 times [2019-11-23 20:46:20,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:20,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023448037] [2019-11-23 20:46:20,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:20,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023448037] [2019-11-23 20:46:20,482 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799769210] [2019-11-23 20:46:20,482 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 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 20:46:20,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:46:20,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:20,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:46:20,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:20,662 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:20,662 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:20,668 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:20,668 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:20,669 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:46:21,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:21,112 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:21,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:21,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-11-23 20:46:21,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957791179] [2019-11-23 20:46:21,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:46:21,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:46:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:46:21,115 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 33 states. [2019-11-23 20:46:23,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:23,176 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2019-11-23 20:46:23,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:46:23,177 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 46 [2019-11-23 20:46:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:23,178 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:46:23,178 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:46:23,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=707, Invalid=4695, Unknown=0, NotChecked=0, Total=5402 [2019-11-23 20:46:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:46:23,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2019-11-23 20:46:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:46:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2019-11-23 20:46:23,187 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2019-11-23 20:46:23,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:23,188 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2019-11-23 20:46:23,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:46:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2019-11-23 20:46:23,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:46:23,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:23,189 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:23,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:23,393 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1325869362, now seen corresponding path program 10 times [2019-11-23 20:46:23,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:23,395 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661199039] [2019-11-23 20:46:23,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:23,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661199039] [2019-11-23 20:46:23,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641957058] [2019-11-23 20:46:23,647 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 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 20:46:23,695 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:46:23,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:23,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 20:46:23,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:23,858 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:46:23,858 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:23,862 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:23,863 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:23,863 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:46:24,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:24,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:24,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2019-11-23 20:46:24,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114595570] [2019-11-23 20:46:24,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:46:24,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:24,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:46:24,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:46:24,143 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 35 states. [2019-11-23 20:46:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:25,079 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2019-11-23 20:46:25,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:46:25,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 53 [2019-11-23 20:46:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:25,080 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:46:25,080 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:46:25,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:46:25,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:46:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2019-11-23 20:46:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:46:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2019-11-23 20:46:25,089 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2019-11-23 20:46:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:25,089 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2019-11-23 20:46:25,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:46:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2019-11-23 20:46:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:46:25,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:25,092 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:25,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:25,293 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:25,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1356389828, now seen corresponding path program 11 times [2019-11-23 20:46:25,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:25,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436036573] [2019-11-23 20:46:25,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 73 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:25,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436036573] [2019-11-23 20:46:25,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357917284] [2019-11-23 20:46:25,471 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 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 20:46:25,530 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-11-23 20:46:25,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:25,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:46:25,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:25,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:25,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2019-11-23 20:46:25,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932777365] [2019-11-23 20:46:25,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:46:25,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:25,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:46:25,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:46:25,696 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 28 states. [2019-11-23 20:46:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:25,957 INFO L93 Difference]: Finished difference Result 137 states and 143 transitions. [2019-11-23 20:46:25,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:46:25,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 57 [2019-11-23 20:46:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:25,958 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:46:25,958 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:46:25,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:46:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:46:25,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2019-11-23 20:46:25,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:46:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:46:25,966 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2019-11-23 20:46:25,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:25,967 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:46:25,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:46:25,967 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:46:25,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:46:25,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:25,968 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:26,171 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:26,172 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:26,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash 800586765, now seen corresponding path program 12 times [2019-11-23 20:46:26,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:26,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784509380] [2019-11-23 20:46:26,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:26,573 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:26,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784509380] [2019-11-23 20:46:26,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334194158] [2019-11-23 20:46:26,578 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 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 20:46:26,695 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 20:46:26,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:26,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:46:26,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:26,962 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:26,962 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:26,967 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:26,968 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:26,968 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-23 20:46:27,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 91 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:27,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:27,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2019-11-23 20:46:27,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711496230] [2019-11-23 20:46:27,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:46:27,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:46:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:46:27,508 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 41 states. [2019-11-23 20:46:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:30,471 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2019-11-23 20:46:30,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 20:46:30,471 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 60 [2019-11-23 20:46:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:30,472 INFO L225 Difference]: With dead ends: 147 [2019-11-23 20:46:30,472 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:46:30,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2403 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=747, Invalid=8183, Unknown=0, NotChecked=0, Total=8930 [2019-11-23 20:46:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:46:30,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2019-11-23 20:46:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:46:30,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-11-23 20:46:30,483 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2019-11-23 20:46:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:30,483 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-11-23 20:46:30,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:46:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-11-23 20:46:30,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:46:30,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:30,484 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:30,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:30,688 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash -542230246, now seen corresponding path program 13 times [2019-11-23 20:46:30,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:30,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881485454] [2019-11-23 20:46:30,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:31,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881485454] [2019-11-23 20:46:31,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929158775] [2019-11-23 20:46:31,032 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 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 20:46:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:31,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:46:31,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:31,097 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:31,098 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:31,105 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:31,106 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:46:31,106 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 20:46:31,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:31,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:31,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 31 [2019-11-23 20:46:31,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443457429] [2019-11-23 20:46:31,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:46:31,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:31,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:46:31,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:46:31,365 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 31 states. [2019-11-23 20:46:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:32,492 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2019-11-23 20:46:32,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:46:32,493 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2019-11-23 20:46:32,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:32,494 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:46:32,494 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:46:32,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=2435, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:46:32,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:46:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2019-11-23 20:46:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:46:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2019-11-23 20:46:32,502 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2019-11-23 20:46:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:32,502 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2019-11-23 20:46:32,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:46:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2019-11-23 20:46:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:46:32,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:32,503 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:32,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:32,707 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:32,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:32,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2042873328, now seen corresponding path program 14 times [2019-11-23 20:46:32,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:32,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057928544] [2019-11-23 20:46:32,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 129 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:32,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057928544] [2019-11-23 20:46:32,982 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437625898] [2019-11-23 20:46:32,982 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 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 20:46:33,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:46:33,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:33,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:46:33,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 162 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:33,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:33,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2019-11-23 20:46:33,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256608196] [2019-11-23 20:46:33,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 20:46:33,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 20:46:33,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:46:33,377 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 34 states. [2019-11-23 20:46:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:33,695 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2019-11-23 20:46:33,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:46:33,700 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 71 [2019-11-23 20:46:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:33,701 INFO L225 Difference]: With dead ends: 167 [2019-11-23 20:46:33,701 INFO L226 Difference]: Without dead ends: 85 [2019-11-23 20:46:33,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:46:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-23 20:46:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2019-11-23 20:46:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:46:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-11-23 20:46:33,709 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2019-11-23 20:46:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:33,710 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-11-23 20:46:33,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 20:46:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-11-23 20:46:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:46:33,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:33,711 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:33,914 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:33,915 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:33,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:33,915 INFO L82 PathProgramCache]: Analyzing trace with hash -924834663, now seen corresponding path program 15 times [2019-11-23 20:46:33,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:33,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124663014] [2019-11-23 20:46:33,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:34,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124663014] [2019-11-23 20:46:34,319 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39641309] [2019-11-23 20:46:34,319 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 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 20:46:34,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-11-23 20:46:34,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:34,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:46:34,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:34,693 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:34,694 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:34,699 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:34,699 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:34,700 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:46:35,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:35,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:35,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 49 [2019-11-23 20:46:35,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031307063] [2019-11-23 20:46:35,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:46:35,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:35,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:46:35,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:46:35,483 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 49 states. [2019-11-23 20:46:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:39,477 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2019-11-23 20:46:39,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-23 20:46:39,478 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 74 [2019-11-23 20:46:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:39,478 INFO L225 Difference]: With dead ends: 179 [2019-11-23 20:46:39,478 INFO L226 Difference]: Without dead ends: 93 [2019-11-23 20:46:39,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1341, Invalid=11541, Unknown=0, NotChecked=0, Total=12882 [2019-11-23 20:46:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-23 20:46:39,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2019-11-23 20:46:39,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:46:39,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2019-11-23 20:46:39,489 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2019-11-23 20:46:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:39,489 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2019-11-23 20:46:39,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:46:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2019-11-23 20:46:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-23 20:46:39,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:39,490 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:39,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:39,691 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:39,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:39,692 INFO L82 PathProgramCache]: Analyzing trace with hash -536860826, now seen corresponding path program 16 times [2019-11-23 20:46:39,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:39,692 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995105374] [2019-11-23 20:46:39,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:40,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995105374] [2019-11-23 20:46:40,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668477852] [2019-11-23 20:46:40,269 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 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 20:46:40,348 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:46:40,349 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:40,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 58 conjunts are in the unsatisfiable core [2019-11-23 20:46:40,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:40,712 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-23 20:46:40,713 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:40,717 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:40,717 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:40,717 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-11-23 20:46:41,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:41,239 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:41,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:41,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2019-11-23 20:46:41,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124907580] [2019-11-23 20:46:41,240 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 20:46:41,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:41,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 20:46:41,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2377, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 20:46:41,242 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 51 states. [2019-11-23 20:46:43,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:43,046 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2019-11-23 20:46:43,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 20:46:43,047 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 81 [2019-11-23 20:46:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:43,048 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:46:43,048 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:46:43,050 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=368, Invalid=5332, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 20:46:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:46:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2019-11-23 20:46:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:46:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2019-11-23 20:46:43,056 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2019-11-23 20:46:43,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:43,056 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2019-11-23 20:46:43,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 20:46:43,056 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2019-11-23 20:46:43,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:46:43,057 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:43,057 INFO L410 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:43,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:43,261 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:43,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash 336994908, now seen corresponding path program 17 times [2019-11-23 20:46:43,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:43,262 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060162574] [2019-11-23 20:46:43,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 201 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:43,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060162574] [2019-11-23 20:46:43,572 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344559945] [2019-11-23 20:46:43,573 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 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 20:46:43,687 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:46:43,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:43,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:46:43,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 242 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:44,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:44,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2019-11-23 20:46:44,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008373560] [2019-11-23 20:46:44,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:46:44,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:44,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:46:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:46:44,186 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 40 states. [2019-11-23 20:46:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:46:44,690 INFO L93 Difference]: Finished difference Result 197 states and 203 transitions. [2019-11-23 20:46:44,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:46:44,690 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2019-11-23 20:46:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:46:44,691 INFO L225 Difference]: With dead ends: 197 [2019-11-23 20:46:44,692 INFO L226 Difference]: Without dead ends: 99 [2019-11-23 20:46:44,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:46:44,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-23 20:46:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2019-11-23 20:46:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-23 20:46:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2019-11-23 20:46:44,702 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 85 [2019-11-23 20:46:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:46:44,702 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2019-11-23 20:46:44,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:46:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2019-11-23 20:46:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-23 20:46:44,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:46:44,703 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:46:44,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:46:44,915 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:46:44,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:46:44,916 INFO L82 PathProgramCache]: Analyzing trace with hash 587491621, now seen corresponding path program 18 times [2019-11-23 20:46:44,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:46:44,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415733839] [2019-11-23 20:46:44,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:46:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:46:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:45,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415733839] [2019-11-23 20:46:45,428 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975526109] [2019-11-23 20:46:45,428 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 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 20:46:45,612 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:46:45,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:46:45,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 20:46:45,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:46:45,965 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:46:45,966 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:45,970 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:45,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:46:45,971 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-23 20:46:46,133 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:46:46,134 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 62 [2019-11-23 20:46:46,134 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:46:46,166 INFO L567 ElimStorePlain]: treesize reduction 36, result has 50.7 percent of original size [2019-11-23 20:46:46,167 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:46:46,167 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2019-11-23 20:46:48,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:46:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 231 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:46:48,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:46:48,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 59 [2019-11-23 20:46:48,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786955624] [2019-11-23 20:46:48,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-23 20:46:48,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:46:48,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-23 20:46:48,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3160, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 20:46:48,133 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 59 states. [2019-11-23 20:46:57,535 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2019-11-23 20:46:58,458 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2019-11-23 20:46:58,943 WARN L192 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-23 20:46:59,107 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2019-11-23 20:47:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:02,944 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2019-11-23 20:47:02,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-11-23 20:47:02,944 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 88 [2019-11-23 20:47:02,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:02,945 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:47:02,945 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:47:02,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6521 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1888, Invalid=22911, Unknown=7, NotChecked=0, Total=24806 [2019-11-23 20:47:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:47:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2019-11-23 20:47:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:47:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2019-11-23 20:47:02,955 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 88 [2019-11-23 20:47:02,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:02,956 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2019-11-23 20:47:02,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-23 20:47:02,956 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2019-11-23 20:47:02,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-23 20:47:02,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:02,957 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:03,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:03,162 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:03,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:03,162 INFO L82 PathProgramCache]: Analyzing trace with hash -554131022, now seen corresponding path program 19 times [2019-11-23 20:47:03,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:03,163 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074528129] [2019-11-23 20:47:03,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:03,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074528129] [2019-11-23 20:47:03,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249878150] [2019-11-23 20:47:03,879 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 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 20:47:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:03,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 62 conjunts are in the unsatisfiable core [2019-11-23 20:47:03,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:03,941 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:47:03,941 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:47:03,948 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:47:03,949 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:47:03,949 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 20:47:04,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:47:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:04,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:04,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 43 [2019-11-23 20:47:04,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454296960] [2019-11-23 20:47:04,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 20:47:04,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:04,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 20:47:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 20:47:04,418 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2019-11-23 20:47:06,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:06,552 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2019-11-23 20:47:06,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:47:06,555 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 95 [2019-11-23 20:47:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:06,555 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:47:06,555 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:47:06,556 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=4811, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:47:06,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:47:06,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2019-11-23 20:47:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:47:06,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2019-11-23 20:47:06,565 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 95 [2019-11-23 20:47:06,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:06,565 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2019-11-23 20:47:06,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 20:47:06,565 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2019-11-23 20:47:06,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-23 20:47:06,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:06,566 INFO L410 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:06,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:06,769 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:06,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1838115160, now seen corresponding path program 20 times [2019-11-23 20:47:06,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:06,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244748914] [2019-11-23 20:47:06,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 289 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:07,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244748914] [2019-11-23 20:47:07,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620494567] [2019-11-23 20:47:07,167 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 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 20:47:07,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:47:07,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:47:07,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:47:07,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 338 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:07,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:07,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2019-11-23 20:47:07,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006277073] [2019-11-23 20:47:07,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:47:07,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:07,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:47:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:47:07,594 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 46 states. [2019-11-23 20:47:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:08,136 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2019-11-23 20:47:08,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:47:08,137 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 99 [2019-11-23 20:47:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:08,138 INFO L225 Difference]: With dead ends: 227 [2019-11-23 20:47:08,138 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:47:08,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2019-11-23 20:47:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:47:08,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2019-11-23 20:47:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:47:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2019-11-23 20:47:08,148 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 99 [2019-11-23 20:47:08,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:08,148 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2019-11-23 20:47:08,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:47:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2019-11-23 20:47:08,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:47:08,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:08,149 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:08,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:08,352 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1966262705, now seen corresponding path program 21 times [2019-11-23 20:47:08,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:08,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549734359] [2019-11-23 20:47:08,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:08,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549734359] [2019-11-23 20:47:08,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602350076] [2019-11-23 20:47:08,997 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 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 20:47:09,206 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:47:09,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:47:09,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:47:09,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:09,634 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:47:09,634 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:47:09,638 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:47:09,638 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:47:09,639 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-23 20:47:10,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:47:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:11,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:11,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 65 [2019-11-23 20:47:11,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373347526] [2019-11-23 20:47:11,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 20:47:11,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 20:47:11,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=3705, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:47:11,023 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 65 states. [2019-11-23 20:47:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:17,387 INFO L93 Difference]: Finished difference Result 239 states and 247 transitions. [2019-11-23 20:47:17,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-11-23 20:47:17,393 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 102 [2019-11-23 20:47:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:17,394 INFO L225 Difference]: With dead ends: 239 [2019-11-23 20:47:17,394 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:47:17,395 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2151, Invalid=21411, Unknown=0, NotChecked=0, Total=23562 [2019-11-23 20:47:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:47:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2019-11-23 20:47:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-23 20:47:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2019-11-23 20:47:17,406 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 102 [2019-11-23 20:47:17,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:17,406 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2019-11-23 20:47:17,406 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 20:47:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2019-11-23 20:47:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:47:17,407 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:17,407 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:17,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:17,611 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash 287418366, now seen corresponding path program 22 times [2019-11-23 20:47:17,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:17,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052699784] [2019-11-23 20:47:17,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:18,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052699784] [2019-11-23 20:47:18,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601548549] [2019-11-23 20:47:18,450 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 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 20:47:18,515 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:47:18,515 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:47:18,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 70 conjunts are in the unsatisfiable core [2019-11-23 20:47:18,519 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:18,533 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:47:18,533 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:47:18,538 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:47:18,538 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:47:18,538 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 20:47:19,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:47:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:19,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:19,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 49 [2019-11-23 20:47:19,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351864745] [2019-11-23 20:47:19,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:47:19,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:19,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:47:19,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:47:19,130 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 49 states. [2019-11-23 20:47:21,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:21,851 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2019-11-23 20:47:21,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-11-23 20:47:21,852 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 109 [2019-11-23 20:47:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:21,853 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:47:21,853 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:47:21,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=343, Invalid=6299, Unknown=0, NotChecked=0, Total=6642 [2019-11-23 20:47:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:47:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2019-11-23 20:47:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:47:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2019-11-23 20:47:21,862 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2019-11-23 20:47:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:21,862 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2019-11-23 20:47:21,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:47:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2019-11-23 20:47:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 20:47:21,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:21,863 INFO L410 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:22,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:22,067 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:22,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash -522873100, now seen corresponding path program 23 times [2019-11-23 20:47:22,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:22,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764305338] [2019-11-23 20:47:22,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 393 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:22,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764305338] [2019-11-23 20:47:22,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59955313] [2019-11-23 20:47:22,535 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 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 20:47:22,692 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:47:22,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:47:22,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:47:22,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 450 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:23,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:23,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2019-11-23 20:47:23,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828457662] [2019-11-23 20:47:23,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-23 20:47:23,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-23 20:47:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=2035, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:47:23,244 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2019-11-23 20:47:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:23,822 INFO L93 Difference]: Finished difference Result 257 states and 263 transitions. [2019-11-23 20:47:23,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:47:23,826 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 113 [2019-11-23 20:47:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:23,827 INFO L225 Difference]: With dead ends: 257 [2019-11-23 20:47:23,827 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:47:23,827 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2019-11-23 20:47:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:47:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2019-11-23 20:47:23,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:47:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2019-11-23 20:47:23,839 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2019-11-23 20:47:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:23,840 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2019-11-23 20:47:23,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-23 20:47:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2019-11-23 20:47:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-23 20:47:23,841 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:23,841 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:24,045 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:24,045 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1493612995, now seen corresponding path program 24 times [2019-11-23 20:47:24,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:24,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583412420] [2019-11-23 20:47:24,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:24,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:24,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583412420] [2019-11-23 20:47:24,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546072061] [2019-11-23 20:47:24,904 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 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 20:47:25,659 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:47:25,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:47:25,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:47:25,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:26,318 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:47:26,318 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:47:26,324 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:47:26,325 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:47:26,325 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-11-23 20:47:27,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:47:27,823 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 435 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:27,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:27,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 73 [2019-11-23 20:47:27,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623310492] [2019-11-23 20:47:27,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-23 20:47:27,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:27,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-23 20:47:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=4848, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 20:47:27,825 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand 73 states. [2019-11-23 20:47:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:36,053 INFO L93 Difference]: Finished difference Result 264 states and 272 transitions. [2019-11-23 20:47:36,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-11-23 20:47:36,054 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 116 [2019-11-23 20:47:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:36,055 INFO L225 Difference]: With dead ends: 264 [2019-11-23 20:47:36,055 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:47:36,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7237 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2102, Invalid=28348, Unknown=0, NotChecked=0, Total=30450 [2019-11-23 20:47:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:47:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2019-11-23 20:47:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:47:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2019-11-23 20:47:36,064 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 116 [2019-11-23 20:47:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:36,064 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2019-11-23 20:47:36,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-23 20:47:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2019-11-23 20:47:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 20:47:36,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:36,065 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:36,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:36,270 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:36,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1836762550, now seen corresponding path program 25 times [2019-11-23 20:47:36,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:36,271 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953051447] [2019-11-23 20:47:36,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:37,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953051447] [2019-11-23 20:47:37,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338076779] [2019-11-23 20:47:37,423 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 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 20:47:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:37,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 78 conjunts are in the unsatisfiable core [2019-11-23 20:47:37,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:37,527 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:47:37,528 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:47:37,533 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:47:37,533 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:47:37,534 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-11-23 20:47:38,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:47:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:38,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:38,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 55 [2019-11-23 20:47:38,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537321058] [2019-11-23 20:47:38,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 20:47:38,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 20:47:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 20:47:38,310 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 55 states. [2019-11-23 20:47:42,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:42,163 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2019-11-23 20:47:42,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-11-23 20:47:42,163 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 123 [2019-11-23 20:47:42,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:42,164 INFO L225 Difference]: With dead ends: 136 [2019-11-23 20:47:42,164 INFO L226 Difference]: Without dead ends: 134 [2019-11-23 20:47:42,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=385, Invalid=7987, Unknown=0, NotChecked=0, Total=8372 [2019-11-23 20:47:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-23 20:47:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2019-11-23 20:47:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-23 20:47:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2019-11-23 20:47:42,174 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 123 [2019-11-23 20:47:42,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:42,174 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2019-11-23 20:47:42,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 20:47:42,175 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2019-11-23 20:47:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-23 20:47:42,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:42,175 INFO L410 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:42,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:42,379 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash 105849664, now seen corresponding path program 26 times [2019-11-23 20:47:42,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:42,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546816175] [2019-11-23 20:47:42,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:47:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 513 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:43,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546816175] [2019-11-23 20:47:43,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411942625] [2019-11-23 20:47:43,098 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 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 20:47:43,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:47:43,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:47:43,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 20:47:43,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:47:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 578 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:47:44,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:47:44,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2019-11-23 20:47:44,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303516152] [2019-11-23 20:47:44,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 20:47:44,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:47:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 20:47:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=2541, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:47:44,042 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 58 states. [2019-11-23 20:47:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:47:44,847 INFO L93 Difference]: Finished difference Result 287 states and 293 transitions. [2019-11-23 20:47:44,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:47:44,847 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 127 [2019-11-23 20:47:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:47:44,849 INFO L225 Difference]: With dead ends: 287 [2019-11-23 20:47:44,849 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:47:44,850 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2019-11-23 20:47:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:47:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-11-23 20:47:44,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-23 20:47:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2019-11-23 20:47:44,872 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 127 [2019-11-23 20:47:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:47:44,873 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2019-11-23 20:47:44,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 20:47:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2019-11-23 20:47:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-23 20:47:44,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:47:44,875 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:47:45,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:47:45,079 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:47:45,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:47:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1885724361, now seen corresponding path program 27 times [2019-11-23 20:47:45,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:47:45,080 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888611086] [2019-11-23 20:47:45,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:47:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat