/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/reducercommutativity/max40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:26:28,484 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:26:28,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:26:28,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:26:28,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:26:28,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:26:28,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:26:28,502 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:26:28,504 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:26:28,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:26:28,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:26:28,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:26:28,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:26:28,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:26:28,509 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:26:28,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:26:28,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:26:28,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:26:28,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:26:28,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:26:28,516 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:26:28,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:26:28,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:26:28,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:26:28,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:26:28,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:26:28,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:26:28,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:26:28,539 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 22:26:28,559 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:26:28,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:26:28,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:26:28,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:26:28,561 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:26:28,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:26:28,562 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:26:28,562 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:26:28,562 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:26:28,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:26:28,563 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:26:28,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:26:28,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:26:28,564 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:26:28,564 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:26:28,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:26:28,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:26:28,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:26:28,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:26:28,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:26:28,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:26:28,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:26:28,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:26:28,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:26:28,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:26:28,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:26:28,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:26:28,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:26:28,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:26:28,567 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:26:28,838 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:26:28,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:26:28,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:26:28,853 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:26:28,854 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:26:28,856 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-11-23 22:26:28,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791e5f816/1b9754682be24adbbb15f450bd7e7535/FLAG7d44c9772 [2019-11-23 22:26:29,378 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:26:29,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max40-1.i [2019-11-23 22:26:29,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791e5f816/1b9754682be24adbbb15f450bd7e7535/FLAG7d44c9772 [2019-11-23 22:26:29,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/791e5f816/1b9754682be24adbbb15f450bd7e7535 [2019-11-23 22:26:29,808 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:26:29,810 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:26:29,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:29,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:26:29,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:26:29,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:29" (1/1) ... [2019-11-23 22:26:29,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f31398e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:29, skipping insertion in model container [2019-11-23 22:26:29,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:26:29" (1/1) ... [2019-11-23 22:26:29,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:26:29,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:26:30,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:30,050 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:26:30,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:26:30,086 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:26:30,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30 WrapperNode [2019-11-23 22:26:30,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:26:30,087 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:30,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:26:30,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:26:30,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:26:30,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:26:30,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:26:30,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:26:30,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,257 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,274 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (1/1) ... [2019-11-23 22:26:30,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:26:30,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:26:30,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:26:30,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:26:30,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (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 22:26:30,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:26:30,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:26:30,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:26:30,347 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:26:30,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:26:30,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:26:30,616 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:26:30,616 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 22:26:30,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:30 BoogieIcfgContainer [2019-11-23 22:26:30,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:26:30,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:26:30,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:26:30,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:26:30,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:26:29" (1/3) ... [2019-11-23 22:26:30,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21285a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:30, skipping insertion in model container [2019-11-23 22:26:30,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:26:30" (2/3) ... [2019-11-23 22:26:30,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21285a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:26:30, skipping insertion in model container [2019-11-23 22:26:30,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:26:30" (3/3) ... [2019-11-23 22:26:30,627 INFO L109 eAbstractionObserver]: Analyzing ICFG max40-1.i [2019-11-23 22:26:30,642 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:26:30,652 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:26:30,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:26:30,697 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:26:30,697 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:26:30,697 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:26:30,698 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:26:30,698 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:26:30,698 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:26:30,698 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:26:30,698 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:26:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-23 22:26:30,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:26:30,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:30,724 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:30,725 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1332003061, now seen corresponding path program 1 times [2019-11-23 22:26:30,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:30,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602595928] [2019-11-23 22:26:30,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:30,875 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 22:26:30,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602595928] [2019-11-23 22:26:30,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:30,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:26:30,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306094137] [2019-11-23 22:26:30,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:26:30,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:30,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:26:30,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:26:30,894 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-23 22:26:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:30,912 INFO L93 Difference]: Finished difference Result 62 states and 86 transitions. [2019-11-23 22:26:30,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:26:30,914 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-23 22:26:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:30,923 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:26:30,923 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:26:30,926 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 22:26:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:26:30,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:26:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:26:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 22:26:30,959 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-23 22:26:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:30,960 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 22:26:30,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:26:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 22:26:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:26:30,961 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:30,962 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:30,962 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:30,963 INFO L82 PathProgramCache]: Analyzing trace with hash 741944299, now seen corresponding path program 1 times [2019-11-23 22:26:30,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:30,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994209332] [2019-11-23 22:26:30,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:31,021 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 22:26:31,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994209332] [2019-11-23 22:26:31,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:31,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:31,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178016250] [2019-11-23 22:26:31,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:31,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:31,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:31,026 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 3 states. [2019-11-23 22:26:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:31,061 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2019-11-23 22:26:31,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:31,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 22:26:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:31,063 INFO L225 Difference]: With dead ends: 56 [2019-11-23 22:26:31,063 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:26:31,065 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 22:26:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:26:31,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-23 22:26:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 22:26:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-11-23 22:26:31,072 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2019-11-23 22:26:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:31,072 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-11-23 22:26:31,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:31,073 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-11-23 22:26:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:26:31,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:31,074 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:31,074 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:31,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:31,074 INFO L82 PathProgramCache]: Analyzing trace with hash -826131671, now seen corresponding path program 1 times [2019-11-23 22:26:31,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:31,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572592692] [2019-11-23 22:26:31,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:26:31,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572592692] [2019-11-23 22:26:31,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:31,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:31,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522838023] [2019-11-23 22:26:31,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:31,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:31,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:31,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:31,158 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2019-11-23 22:26:31,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:31,266 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2019-11-23 22:26:31,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:31,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-23 22:26:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:31,270 INFO L225 Difference]: With dead ends: 62 [2019-11-23 22:26:31,270 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 22:26:31,271 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 22:26:31,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 22:26:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-11-23 22:26:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:26:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-11-23 22:26:31,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2019-11-23 22:26:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:31,286 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-11-23 22:26:31,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-11-23 22:26:31,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:26:31,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:31,288 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:31,288 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1925905852, now seen corresponding path program 1 times [2019-11-23 22:26:31,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:31,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291304553] [2019-11-23 22:26:31,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:31,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291304553] [2019-11-23 22:26:31,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:26:31,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:26:31,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521189844] [2019-11-23 22:26:31,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:26:31,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:31,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:26:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:26:31,392 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 3 states. [2019-11-23 22:26:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:31,415 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-11-23 22:26:31,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:26:31,417 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-11-23 22:26:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:31,418 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:26:31,418 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:26:31,419 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 22:26:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:26:31,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-23 22:26:31,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 22:26:31,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-11-23 22:26:31,425 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2019-11-23 22:26:31,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:31,425 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-11-23 22:26:31,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:26:31,425 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-11-23 22:26:31,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 22:26:31,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:31,427 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:31,427 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1542894914, now seen corresponding path program 1 times [2019-11-23 22:26:31,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:31,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562037597] [2019-11-23 22:26:31,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:31,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562037597] [2019-11-23 22:26:31,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949699613] [2019-11-23 22:26:31,531 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 22:26:31,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:31,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:31,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:31,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:31,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 22:26:31,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675912866] [2019-11-23 22:26:31,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:26:31,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:26:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:31,668 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2019-11-23 22:26:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:31,694 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-11-23 22:26:31,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:26:31,695 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-23 22:26:31,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:31,695 INFO L225 Difference]: With dead ends: 66 [2019-11-23 22:26:31,696 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:26:31,696 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:26:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:26:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 22:26:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 22:26:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2019-11-23 22:26:31,703 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 33 [2019-11-23 22:26:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:31,703 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2019-11-23 22:26:31,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:26:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2019-11-23 22:26:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 22:26:31,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:31,705 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:31,908 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:31,908 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:31,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:31,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1235585152, now seen corresponding path program 2 times [2019-11-23 22:26:31,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:31,911 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447265053] [2019-11-23 22:26:31,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:32,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447265053] [2019-11-23 22:26:32,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969333422] [2019-11-23 22:26:32,032 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:32,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:32,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:32,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:32,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:32,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:32,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 22:26:32,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147967289] [2019-11-23 22:26:32,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:26:32,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:26:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:32,119 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 6 states. [2019-11-23 22:26:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:32,149 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2019-11-23 22:26:32,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:26:32,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-23 22:26:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:32,151 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:26:32,151 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:26:32,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:26:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:26:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-11-23 22:26:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:26:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-23 22:26:32,157 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 35 [2019-11-23 22:26:32,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:32,157 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-23 22:26:32,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:26:32,157 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-23 22:26:32,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:26:32,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:32,159 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:32,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:32,362 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:32,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2031320002, now seen corresponding path program 3 times [2019-11-23 22:26:32,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:32,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512999372] [2019-11-23 22:26:32,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:26:32,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512999372] [2019-11-23 22:26:32,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737783704] [2019-11-23 22:26:32,460 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:32,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:26:32,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:32,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:32,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 22:26:32,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:32,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 22:26:32,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414200207] [2019-11-23 22:26:32,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:26:32,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:32,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:26:32,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:32,558 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 8 states. [2019-11-23 22:26:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:32,670 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2019-11-23 22:26:32,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 22:26:32,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2019-11-23 22:26:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:32,672 INFO L225 Difference]: With dead ends: 91 [2019-11-23 22:26:32,672 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:26:32,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:26:32,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2019-11-23 22:26:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 22:26:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2019-11-23 22:26:32,679 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 37 [2019-11-23 22:26:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:32,680 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2019-11-23 22:26:32,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:26:32,680 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2019-11-23 22:26:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 22:26:32,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:32,682 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:32,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:32,886 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:32,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:32,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1702871319, now seen corresponding path program 4 times [2019-11-23 22:26:32,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:32,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475296775] [2019-11-23 22:26:32,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 22:26:32,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475296775] [2019-11-23 22:26:32,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688483850] [2019-11-23 22:26:32,979 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:33,059 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:33,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:33,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:26:33,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 22:26:33,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:33,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 22:26:33,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251306857] [2019-11-23 22:26:33,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 22:26:33,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:33,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 22:26:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:33,090 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 8 states. [2019-11-23 22:26:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:33,125 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2019-11-23 22:26:33,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:26:33,126 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-23 22:26:33,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:33,127 INFO L225 Difference]: With dead ends: 96 [2019-11-23 22:26:33,127 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:26:33,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 22:26:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:26:33,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-11-23 22:26:33,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 22:26:33,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-23 22:26:33,134 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 51 [2019-11-23 22:26:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:33,135 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-23 22:26:33,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 22:26:33,135 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-23 22:26:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 22:26:33,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:33,136 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:33,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:33,341 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:33,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:33,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1048346411, now seen corresponding path program 5 times [2019-11-23 22:26:33,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:33,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795335310] [2019-11-23 22:26:33,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 22:26:33,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795335310] [2019-11-23 22:26:33,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154842799] [2019-11-23 22:26:33,477 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:33,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:26:33,577 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:33,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:33,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-23 22:26:33,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:33,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 22:26:33,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335256972] [2019-11-23 22:26:33,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:26:33,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:26:33,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:33,631 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 11 states. [2019-11-23 22:26:33,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:33,747 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2019-11-23 22:26:33,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:26:33,748 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2019-11-23 22:26:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:33,748 INFO L225 Difference]: With dead ends: 119 [2019-11-23 22:26:33,749 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 22:26:33,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:33,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 22:26:33,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2019-11-23 22:26:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 22:26:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2019-11-23 22:26:33,756 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 53 [2019-11-23 22:26:33,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:33,757 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2019-11-23 22:26:33,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:26:33,757 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2019-11-23 22:26:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 22:26:33,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:33,758 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:33,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:33,966 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:33,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:33,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1823697106, now seen corresponding path program 6 times [2019-11-23 22:26:33,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:33,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625584114] [2019-11-23 22:26:33,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-23 22:26:34,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625584114] [2019-11-23 22:26:34,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798129134] [2019-11-23 22:26:34,087 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:34,151 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-23 22:26:34,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:34,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:26:34,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 22:26:34,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:34,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-11-23 22:26:34,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087911153] [2019-11-23 22:26:34,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:26:34,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:26:34,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:34,198 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 11 states. [2019-11-23 22:26:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:34,248 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2019-11-23 22:26:34,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:26:34,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2019-11-23 22:26:34,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:34,249 INFO L225 Difference]: With dead ends: 127 [2019-11-23 22:26:34,249 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 22:26:34,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 22:26:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-23 22:26:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 22:26:34,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-23 22:26:34,257 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 67 [2019-11-23 22:26:34,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:34,257 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-23 22:26:34,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:26:34,258 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-23 22:26:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 22:26:34,259 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:34,259 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:34,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:34,466 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash 376662890, now seen corresponding path program 7 times [2019-11-23 22:26:34,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:34,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389808429] [2019-11-23 22:26:34,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:34,600 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:34,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389808429] [2019-11-23 22:26:34,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433198353] [2019-11-23 22:26:34,601 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:26:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:34,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:26:34,679 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:34,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:34,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 22:26:34,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294410017] [2019-11-23 22:26:34,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:26:34,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:34,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:26:34,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:34,704 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 11 states. [2019-11-23 22:26:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:34,752 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2019-11-23 22:26:34,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:26:34,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2019-11-23 22:26:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:34,754 INFO L225 Difference]: With dead ends: 130 [2019-11-23 22:26:34,754 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:26:34,754 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:26:34,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:26:34,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-11-23 22:26:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 22:26:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2019-11-23 22:26:34,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 71 [2019-11-23 22:26:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:34,761 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2019-11-23 22:26:34,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:26:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2019-11-23 22:26:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-23 22:26:34,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:34,763 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:34,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:34,972 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:34,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:34,972 INFO L82 PathProgramCache]: Analyzing trace with hash -878190552, now seen corresponding path program 8 times [2019-11-23 22:26:34,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:34,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978428430] [2019-11-23 22:26:34,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:35,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978428430] [2019-11-23 22:26:35,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144775942] [2019-11-23 22:26:35,072 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:35,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:35,143 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:35,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:26:35,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:35,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:35,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 22:26:35,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928183366] [2019-11-23 22:26:35,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:26:35,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:35,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:26:35,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:26:35,172 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 12 states. [2019-11-23 22:26:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:35,211 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2019-11-23 22:26:35,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:26:35,212 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2019-11-23 22:26:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:35,213 INFO L225 Difference]: With dead ends: 132 [2019-11-23 22:26:35,213 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:26:35,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:26:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:26:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-11-23 22:26:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 22:26:35,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2019-11-23 22:26:35,219 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2019-11-23 22:26:35,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:35,219 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2019-11-23 22:26:35,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:26:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2019-11-23 22:26:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 22:26:35,221 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:35,221 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:35,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:35,426 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:35,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash 93461862, now seen corresponding path program 9 times [2019-11-23 22:26:35,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:35,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413052194] [2019-11-23 22:26:35,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 22:26:35,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413052194] [2019-11-23 22:26:35,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577297105] [2019-11-23 22:26:35,530 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:35,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:26:35,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:35,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:26:35,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-23 22:26:35,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:35,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-23 22:26:35,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914252435] [2019-11-23 22:26:35,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:26:35,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:35,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:26:35,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:26:35,659 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 15 states. [2019-11-23 22:26:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:35,725 INFO L93 Difference]: Finished difference Result 137 states and 164 transitions. [2019-11-23 22:26:35,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:26:35,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 75 [2019-11-23 22:26:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:35,726 INFO L225 Difference]: With dead ends: 137 [2019-11-23 22:26:35,726 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 22:26:35,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:26:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 22:26:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-11-23 22:26:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 22:26:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2019-11-23 22:26:35,733 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 75 [2019-11-23 22:26:35,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:35,744 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2019-11-23 22:26:35,744 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:26:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2019-11-23 22:26:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 22:26:35,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:35,745 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:35,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:35,949 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1555506594, now seen corresponding path program 10 times [2019-11-23 22:26:35,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:35,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103657919] [2019-11-23 22:26:35,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-11-23 22:26:36,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103657919] [2019-11-23 22:26:36,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388986889] [2019-11-23 22:26:36,076 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:36,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:36,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:36,159 INFO L255 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:26:36,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-11-23 22:26:36,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:36,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-11-23 22:26:36,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990415163] [2019-11-23 22:26:36,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:26:36,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:36,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:26:36,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:36,222 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand 17 states. [2019-11-23 22:26:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:36,387 INFO L93 Difference]: Finished difference Result 161 states and 196 transitions. [2019-11-23 22:26:36,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:26:36,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2019-11-23 22:26:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:36,389 INFO L225 Difference]: With dead ends: 161 [2019-11-23 22:26:36,389 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:26:36,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:26:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2019-11-23 22:26:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 22:26:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2019-11-23 22:26:36,396 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 79 [2019-11-23 22:26:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:36,396 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2019-11-23 22:26:36,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:26:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2019-11-23 22:26:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 22:26:36,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:36,397 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:36,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:36,601 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:36,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:36,602 INFO L82 PathProgramCache]: Analyzing trace with hash -361354501, now seen corresponding path program 11 times [2019-11-23 22:26:36,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:36,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819715264] [2019-11-23 22:26:36,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 22:26:36,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819715264] [2019-11-23 22:26:36,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64525021] [2019-11-23 22:26:36,732 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:36,902 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:26:36,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:36,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:26:36,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2019-11-23 22:26:36,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:36,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2019-11-23 22:26:36,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215659317] [2019-11-23 22:26:36,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:26:36,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:26:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:36,986 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 18 states. [2019-11-23 22:26:37,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:37,060 INFO L93 Difference]: Finished difference Result 169 states and 202 transitions. [2019-11-23 22:26:37,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:26:37,060 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2019-11-23 22:26:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:37,061 INFO L225 Difference]: With dead ends: 169 [2019-11-23 22:26:37,061 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 22:26:37,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 22:26:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2019-11-23 22:26:37,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 22:26:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2019-11-23 22:26:37,067 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 93 [2019-11-23 22:26:37,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:37,067 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2019-11-23 22:26:37,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:26:37,067 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2019-11-23 22:26:37,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 22:26:37,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:37,068 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:37,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:37,273 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1370395191, now seen corresponding path program 12 times [2019-11-23 22:26:37,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:37,274 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77312028] [2019-11-23 22:26:37,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 22:26:37,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77312028] [2019-11-23 22:26:37,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701545519] [2019-11-23 22:26:37,418 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:37,813 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-23 22:26:37,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:37,816 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:26:37,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-23 22:26:37,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:37,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2019-11-23 22:26:37,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920863759] [2019-11-23 22:26:37,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 22:26:37,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:37,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 22:26:37,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:37,894 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand 20 states. [2019-11-23 22:26:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:37,984 INFO L93 Difference]: Finished difference Result 175 states and 208 transitions. [2019-11-23 22:26:37,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:26:37,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2019-11-23 22:26:37,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:37,985 INFO L225 Difference]: With dead ends: 175 [2019-11-23 22:26:37,986 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 22:26:37,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2019-11-23 22:26:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 22:26:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-11-23 22:26:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-23 22:26:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2019-11-23 22:26:37,991 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 97 [2019-11-23 22:26:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:37,991 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2019-11-23 22:26:37,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 22:26:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2019-11-23 22:26:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 22:26:37,992 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:37,992 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:38,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:38,198 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:38,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:38,199 INFO L82 PathProgramCache]: Analyzing trace with hash -259880077, now seen corresponding path program 13 times [2019-11-23 22:26:38,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:38,200 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906222615] [2019-11-23 22:26:38,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:38,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906222615] [2019-11-23 22:26:38,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666496460] [2019-11-23 22:26:38,366 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:38,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:26:38,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:38,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:38,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 22:26:38,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104631241] [2019-11-23 22:26:38,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:26:38,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:38,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:26:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:38,486 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand 17 states. [2019-11-23 22:26:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:38,547 INFO L93 Difference]: Finished difference Result 178 states and 210 transitions. [2019-11-23 22:26:38,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 22:26:38,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2019-11-23 22:26:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:38,548 INFO L225 Difference]: With dead ends: 178 [2019-11-23 22:26:38,548 INFO L226 Difference]: Without dead ends: 105 [2019-11-23 22:26:38,549 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:26:38,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-23 22:26:38,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-23 22:26:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 22:26:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2019-11-23 22:26:38,553 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 101 [2019-11-23 22:26:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:38,553 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2019-11-23 22:26:38,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:26:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2019-11-23 22:26:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 22:26:38,554 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:38,555 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:38,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:38,759 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1841782863, now seen corresponding path program 14 times [2019-11-23 22:26:38,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:38,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821834659] [2019-11-23 22:26:38,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:38,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821834659] [2019-11-23 22:26:38,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895774854] [2019-11-23 22:26:38,920 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:39,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:39,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:39,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 22:26:39,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:39,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:39,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 22:26:39,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624924442] [2019-11-23 22:26:39,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 22:26:39,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:39,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 22:26:39,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:39,061 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 18 states. [2019-11-23 22:26:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:39,129 INFO L93 Difference]: Finished difference Result 180 states and 212 transitions. [2019-11-23 22:26:39,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:26:39,130 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 103 [2019-11-23 22:26:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:39,131 INFO L225 Difference]: With dead ends: 180 [2019-11-23 22:26:39,131 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 22:26:39,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 22:26:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 22:26:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-11-23 22:26:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 22:26:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 122 transitions. [2019-11-23 22:26:39,137 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 122 transitions. Word has length 103 [2019-11-23 22:26:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:39,138 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 122 transitions. [2019-11-23 22:26:39,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 22:26:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 122 transitions. [2019-11-23 22:26:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 22:26:39,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:39,139 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:39,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:39,344 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1631937425, now seen corresponding path program 15 times [2019-11-23 22:26:39,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:39,345 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349502526] [2019-11-23 22:26:39,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 22:26:39,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349502526] [2019-11-23 22:26:39,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133113724] [2019-11-23 22:26:39,564 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:39,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 22:26:39,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:39,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:26:39,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2019-11-23 22:26:39,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:39,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 25 [2019-11-23 22:26:39,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074366147] [2019-11-23 22:26:39,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:26:39,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:26:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:26:39,775 INFO L87 Difference]: Start difference. First operand 106 states and 122 transitions. Second operand 25 states. [2019-11-23 22:26:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:40,078 INFO L93 Difference]: Finished difference Result 204 states and 246 transitions. [2019-11-23 22:26:40,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:26:40,078 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2019-11-23 22:26:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:40,079 INFO L225 Difference]: With dead ends: 204 [2019-11-23 22:26:40,079 INFO L226 Difference]: Without dead ends: 131 [2019-11-23 22:26:40,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=620, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:26:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-23 22:26:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2019-11-23 22:26:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 22:26:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2019-11-23 22:26:40,085 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 105 [2019-11-23 22:26:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:40,085 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2019-11-23 22:26:40,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:26:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2019-11-23 22:26:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-23 22:26:40,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:40,086 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:40,295 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:40,296 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:40,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1998074246, now seen corresponding path program 16 times [2019-11-23 22:26:40,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:40,297 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647069825] [2019-11-23 22:26:40,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:40,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647069825] [2019-11-23 22:26:40,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499262945] [2019-11-23 22:26:40,557 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:40,642 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:40,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:40,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:26:40,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:40,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:40,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 22:26:40,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051764578] [2019-11-23 22:26:40,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:26:40,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:26:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:26:40,681 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand 21 states. [2019-11-23 22:26:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:40,737 INFO L93 Difference]: Finished difference Result 210 states and 248 transitions. [2019-11-23 22:26:40,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 22:26:40,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2019-11-23 22:26:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:40,738 INFO L225 Difference]: With dead ends: 210 [2019-11-23 22:26:40,738 INFO L226 Difference]: Without dead ends: 125 [2019-11-23 22:26:40,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:26:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-23 22:26:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-11-23 22:26:40,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 22:26:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2019-11-23 22:26:40,744 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 121 [2019-11-23 22:26:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:40,745 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2019-11-23 22:26:40,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:26:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2019-11-23 22:26:40,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-23 22:26:40,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:40,746 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:40,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:40,951 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:40,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:40,951 INFO L82 PathProgramCache]: Analyzing trace with hash 570931908, now seen corresponding path program 17 times [2019-11-23 22:26:40,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:40,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948938473] [2019-11-23 22:26:40,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:41,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948938473] [2019-11-23 22:26:41,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469263551] [2019-11-23 22:26:41,183 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:41,635 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-11-23 22:26:41,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:41,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 22:26:41,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:41,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:41,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-23 22:26:41,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311967623] [2019-11-23 22:26:41,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:26:41,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:41,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:26:41,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:26:41,690 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand 22 states. [2019-11-23 22:26:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:41,765 INFO L93 Difference]: Finished difference Result 212 states and 250 transitions. [2019-11-23 22:26:41,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:26:41,769 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 123 [2019-11-23 22:26:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:41,770 INFO L225 Difference]: With dead ends: 212 [2019-11-23 22:26:41,770 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 22:26:41,771 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:26:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 22:26:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2019-11-23 22:26:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-23 22:26:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2019-11-23 22:26:41,775 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 123 [2019-11-23 22:26:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:41,775 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2019-11-23 22:26:41,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:26:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2019-11-23 22:26:41,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-23 22:26:41,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:41,777 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:41,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:41,986 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -818287486, now seen corresponding path program 18 times [2019-11-23 22:26:41,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:41,987 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053453702] [2019-11-23 22:26:41,987 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 22:26:42,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053453702] [2019-11-23 22:26:42,265 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509549736] [2019-11-23 22:26:42,266 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:42,641 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 22:26:42,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:42,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 22:26:42,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 37 proven. 45 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-11-23 22:26:42,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:42,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 30 [2019-11-23 22:26:42,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111705719] [2019-11-23 22:26:42,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 22:26:42,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:42,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 22:26:42,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:26:42,812 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand 30 states. [2019-11-23 22:26:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:43,165 INFO L93 Difference]: Finished difference Result 236 states and 284 transitions. [2019-11-23 22:26:43,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:26:43,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 125 [2019-11-23 22:26:43,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:43,167 INFO L225 Difference]: With dead ends: 236 [2019-11-23 22:26:43,167 INFO L226 Difference]: Without dead ends: 151 [2019-11-23 22:26:43,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:26:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-11-23 22:26:43,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2019-11-23 22:26:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-11-23 22:26:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2019-11-23 22:26:43,174 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 125 [2019-11-23 22:26:43,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:43,174 INFO L462 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2019-11-23 22:26:43,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 22:26:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2019-11-23 22:26:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-23 22:26:43,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:43,176 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:43,376 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:43,376 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:43,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash -536877287, now seen corresponding path program 19 times [2019-11-23 22:26:43,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:43,377 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783464760] [2019-11-23 22:26:43,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:43,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:43,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783464760] [2019-11-23 22:26:43,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778329597] [2019-11-23 22:26:43,728 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:43,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:26:43,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:43,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:43,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-23 22:26:43,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097057987] [2019-11-23 22:26:43,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:26:43,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:43,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:26:43,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:26:43,912 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand 25 states. [2019-11-23 22:26:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:44,027 INFO L93 Difference]: Finished difference Result 242 states and 286 transitions. [2019-11-23 22:26:44,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-23 22:26:44,027 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 141 [2019-11-23 22:26:44,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:44,029 INFO L225 Difference]: With dead ends: 242 [2019-11-23 22:26:44,029 INFO L226 Difference]: Without dead ends: 145 [2019-11-23 22:26:44,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:26:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-23 22:26:44,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-11-23 22:26:44,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-23 22:26:44,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 166 transitions. [2019-11-23 22:26:44,038 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 166 transitions. Word has length 141 [2019-11-23 22:26:44,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:44,038 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 166 transitions. [2019-11-23 22:26:44,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:26:44,039 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 166 transitions. [2019-11-23 22:26:44,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 22:26:44,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:44,040 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:44,246 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:44,247 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1512282793, now seen corresponding path program 20 times [2019-11-23 22:26:44,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:44,250 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560219491] [2019-11-23 22:26:44,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:44,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560219491] [2019-11-23 22:26:44,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932660741] [2019-11-23 22:26:44,663 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:44,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:44,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:44,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:26:44,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:44,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:44,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 22:26:44,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108871234] [2019-11-23 22:26:44,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 22:26:44,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:44,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 22:26:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:26:44,795 INFO L87 Difference]: Start difference. First operand 144 states and 166 transitions. Second operand 26 states. [2019-11-23 22:26:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:44,882 INFO L93 Difference]: Finished difference Result 244 states and 288 transitions. [2019-11-23 22:26:44,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:26:44,883 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 143 [2019-11-23 22:26:44,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:44,884 INFO L225 Difference]: With dead ends: 244 [2019-11-23 22:26:44,884 INFO L226 Difference]: Without dead ends: 147 [2019-11-23 22:26:44,885 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 22:26:44,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-11-23 22:26:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2019-11-23 22:26:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-23 22:26:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2019-11-23 22:26:44,890 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 143 [2019-11-23 22:26:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:44,890 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2019-11-23 22:26:44,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 22:26:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2019-11-23 22:26:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 22:26:44,891 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:44,891 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:45,095 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:45,095 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:45,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1720863765, now seen corresponding path program 21 times [2019-11-23 22:26:45,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:45,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048982486] [2019-11-23 22:26:45,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2019-11-23 22:26:45,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048982486] [2019-11-23 22:26:45,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600727161] [2019-11-23 22:26:45,621 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:45,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:26:45,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:45,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:26:45,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2019-11-23 22:26:46,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:46,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8] total 32 [2019-11-23 22:26:46,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130629846] [2019-11-23 22:26:46,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:26:46,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:46,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:26:46,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:46,040 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand 32 states. [2019-11-23 22:26:46,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:46,222 INFO L93 Difference]: Finished difference Result 249 states and 294 transitions. [2019-11-23 22:26:46,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 22:26:46,223 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 145 [2019-11-23 22:26:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:46,225 INFO L225 Difference]: With dead ends: 249 [2019-11-23 22:26:46,225 INFO L226 Difference]: Without dead ends: 152 [2019-11-23 22:26:46,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:46,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-23 22:26:46,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2019-11-23 22:26:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-11-23 22:26:46,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2019-11-23 22:26:46,233 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 145 [2019-11-23 22:26:46,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:46,234 INFO L462 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2019-11-23 22:26:46,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:26:46,234 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2019-11-23 22:26:46,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-23 22:26:46,235 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:46,235 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:46,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:46,439 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:46,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:46,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1206810961, now seen corresponding path program 22 times [2019-11-23 22:26:46,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:46,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190592541] [2019-11-23 22:26:46,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-23 22:26:46,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190592541] [2019-11-23 22:26:46,842 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090212002] [2019-11-23 22:26:46,842 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:46,984 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:26:46,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:46,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 22:26:46,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 810 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-23 22:26:47,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:47,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-11-23 22:26:47,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798783670] [2019-11-23 22:26:47,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 22:26:47,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 22:26:47,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:26:47,063 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 28 states. [2019-11-23 22:26:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:47,143 INFO L93 Difference]: Finished difference Result 252 states and 296 transitions. [2019-11-23 22:26:47,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:26:47,143 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 149 [2019-11-23 22:26:47,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:47,144 INFO L225 Difference]: With dead ends: 252 [2019-11-23 22:26:47,145 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 22:26:47,145 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-11-23 22:26:47,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 22:26:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2019-11-23 22:26:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-11-23 22:26:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 174 transitions. [2019-11-23 22:26:47,152 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 174 transitions. Word has length 149 [2019-11-23 22:26:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:47,153 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 174 transitions. [2019-11-23 22:26:47,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 22:26:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 174 transitions. [2019-11-23 22:26:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 22:26:47,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:47,154 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:47,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:47,358 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:47,358 INFO L82 PathProgramCache]: Analyzing trace with hash 150985103, now seen corresponding path program 23 times [2019-11-23 22:26:47,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:47,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491207880] [2019-11-23 22:26:47,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-11-23 22:26:47,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491207880] [2019-11-23 22:26:47,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855514715] [2019-11-23 22:26:47,848 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:48,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-11-23 22:26:48,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:48,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:26:48,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2019-11-23 22:26:48,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:48,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2019-11-23 22:26:48,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614705735] [2019-11-23 22:26:48,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:26:48,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:26:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=777, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:26:48,864 INFO L87 Difference]: Start difference. First operand 152 states and 174 transitions. Second operand 35 states. [2019-11-23 22:26:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:49,069 INFO L93 Difference]: Finished difference Result 275 states and 328 transitions. [2019-11-23 22:26:49,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:26:49,069 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2019-11-23 22:26:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:49,070 INFO L225 Difference]: With dead ends: 275 [2019-11-23 22:26:49,070 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 22:26:49,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=413, Invalid=777, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:26:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 22:26:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2019-11-23 22:26:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2019-11-23 22:26:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 191 transitions. [2019-11-23 22:26:49,076 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 191 transitions. Word has length 151 [2019-11-23 22:26:49,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:49,076 INFO L462 AbstractCegarLoop]: Abstraction has 166 states and 191 transitions. [2019-11-23 22:26:49,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:26:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 191 transitions. [2019-11-23 22:26:49,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-11-23 22:26:49,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:49,078 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:49,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:49,284 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:49,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:49,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1543853928, now seen corresponding path program 24 times [2019-11-23 22:26:49,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:49,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452098830] [2019-11-23 22:26:49,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2019-11-23 22:26:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452098830] [2019-11-23 22:26:49,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207653754] [2019-11-23 22:26:49,774 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:50,903 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:26:50,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:50,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 22:26:50,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 949 trivial. 0 not checked. [2019-11-23 22:26:51,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:51,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 9] total 36 [2019-11-23 22:26:51,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531175977] [2019-11-23 22:26:51,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 22:26:51,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 22:26:51,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=819, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:26:51,075 INFO L87 Difference]: Start difference. First operand 166 states and 191 transitions. Second operand 36 states. [2019-11-23 22:26:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:51,239 INFO L93 Difference]: Finished difference Result 283 states and 334 transitions. [2019-11-23 22:26:51,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:26:51,240 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 165 [2019-11-23 22:26:51,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:51,241 INFO L225 Difference]: With dead ends: 283 [2019-11-23 22:26:51,241 INFO L226 Difference]: Without dead ends: 172 [2019-11-23 22:26:51,242 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=441, Invalid=819, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 22:26:51,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-11-23 22:26:51,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2019-11-23 22:26:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-11-23 22:26:51,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 195 transitions. [2019-11-23 22:26:51,249 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 195 transitions. Word has length 165 [2019-11-23 22:26:51,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:51,249 INFO L462 AbstractCegarLoop]: Abstraction has 170 states and 195 transitions. [2019-11-23 22:26:51,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 22:26:51,250 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 195 transitions. [2019-11-23 22:26:51,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 22:26:51,251 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:51,251 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:51,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:51,456 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash 93672612, now seen corresponding path program 25 times [2019-11-23 22:26:51,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:51,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952422030] [2019-11-23 22:26:51,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:51,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952422030] [2019-11-23 22:26:51,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836236186] [2019-11-23 22:26:51,968 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 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 22:26:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:52,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:26:52,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:52,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:52,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-11-23 22:26:52,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221953062] [2019-11-23 22:26:52,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:26:52,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:52,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:26:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:26:52,131 INFO L87 Difference]: Start difference. First operand 170 states and 195 transitions. Second operand 31 states. [2019-11-23 22:26:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:52,231 INFO L93 Difference]: Finished difference Result 286 states and 336 transitions. [2019-11-23 22:26:52,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 22:26:52,231 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 169 [2019-11-23 22:26:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:52,232 INFO L225 Difference]: With dead ends: 286 [2019-11-23 22:26:52,232 INFO L226 Difference]: Without dead ends: 173 [2019-11-23 22:26:52,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:26:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-23 22:26:52,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-11-23 22:26:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 22:26:52,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 197 transitions. [2019-11-23 22:26:52,240 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 197 transitions. Word has length 169 [2019-11-23 22:26:52,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:52,240 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 197 transitions. [2019-11-23 22:26:52,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:26:52,240 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 197 transitions. [2019-11-23 22:26:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-23 22:26:52,241 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:52,241 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:52,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:52,445 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:52,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:52,446 INFO L82 PathProgramCache]: Analyzing trace with hash -45995550, now seen corresponding path program 26 times [2019-11-23 22:26:52,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:52,446 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682893179] [2019-11-23 22:26:52,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:53,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682893179] [2019-11-23 22:26:53,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469635657] [2019-11-23 22:26:53,137 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 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 22:26:53,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:53,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:53,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:26:53,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:53,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:53,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 22:26:53,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691796288] [2019-11-23 22:26:53,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 22:26:53,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:53,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 22:26:53,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:53,292 INFO L87 Difference]: Start difference. First operand 172 states and 197 transitions. Second operand 32 states. [2019-11-23 22:26:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:53,395 INFO L93 Difference]: Finished difference Result 288 states and 338 transitions. [2019-11-23 22:26:53,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:26:53,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2019-11-23 22:26:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:53,396 INFO L225 Difference]: With dead ends: 288 [2019-11-23 22:26:53,396 INFO L226 Difference]: Without dead ends: 175 [2019-11-23 22:26:53,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 22:26:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-23 22:26:53,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-11-23 22:26:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-23 22:26:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 199 transitions. [2019-11-23 22:26:53,403 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 199 transitions. Word has length 171 [2019-11-23 22:26:53,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:53,403 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 199 transitions. [2019-11-23 22:26:53,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 22:26:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 199 transitions. [2019-11-23 22:26:53,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 22:26:53,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:53,404 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:53,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:53,609 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:53,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1123113056, now seen corresponding path program 27 times [2019-11-23 22:26:53,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:53,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58238185] [2019-11-23 22:26:53,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:54,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58238185] [2019-11-23 22:26:54,350 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344659186] [2019-11-23 22:26:54,351 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 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 22:26:54,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 22:26:54,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:54,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:26:54,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:54,874 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 22:26:54,874 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:54,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:54,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:26:54,881 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2019-11-23 22:26:55,122 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:26:55,129 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:55,130 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2019-11-23 22:26:55,131 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:55,139 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:55,140 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:26:55,140 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:22 [2019-11-23 22:26:55,303 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:55,304 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2019-11-23 22:26:55,304 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:26:55,306 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:26:55,306 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:26:55,306 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2019-11-23 22:26:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 34 proven. 38 refuted. 0 times theorem prover too weak. 1091 trivial. 0 not checked. [2019-11-23 22:26:55,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:55,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 14] total 44 [2019-11-23 22:26:55,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579482172] [2019-11-23 22:26:55,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 22:26:55,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:55,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 22:26:55,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:26:55,383 INFO L87 Difference]: Start difference. First operand 174 states and 199 transitions. Second operand 44 states. [2019-11-23 22:26:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:57,287 INFO L93 Difference]: Finished difference Result 393 states and 465 transitions. [2019-11-23 22:26:57,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:26:57,288 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2019-11-23 22:26:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:57,290 INFO L225 Difference]: With dead ends: 393 [2019-11-23 22:26:57,290 INFO L226 Difference]: Without dead ends: 280 [2019-11-23 22:26:57,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1567, Invalid=4913, Unknown=0, NotChecked=0, Total=6480 [2019-11-23 22:26:57,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-11-23 22:26:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 211. [2019-11-23 22:26:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-11-23 22:26:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 244 transitions. [2019-11-23 22:26:57,303 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 244 transitions. Word has length 173 [2019-11-23 22:26:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:57,304 INFO L462 AbstractCegarLoop]: Abstraction has 211 states and 244 transitions. [2019-11-23 22:26:57,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 22:26:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 244 transitions. [2019-11-23 22:26:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 22:26:57,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:57,305 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:57,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:57,511 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash 588186464, now seen corresponding path program 1 times [2019-11-23 22:26:57,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:57,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745428084] [2019-11-23 22:26:57,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:58,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745428084] [2019-11-23 22:26:58,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186109386] [2019-11-23 22:26:58,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:58,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 22:26:58,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1222 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:58,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:58,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-11-23 22:26:58,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761507503] [2019-11-23 22:26:58,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-23 22:26:58,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:58,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-23 22:26:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:26:58,163 INFO L87 Difference]: Start difference. First operand 211 states and 244 transitions. Second operand 34 states. [2019-11-23 22:26:58,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:58,260 INFO L93 Difference]: Finished difference Result 362 states and 428 transitions. [2019-11-23 22:26:58,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:26:58,261 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 175 [2019-11-23 22:26:58,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:58,262 INFO L225 Difference]: With dead ends: 362 [2019-11-23 22:26:58,262 INFO L226 Difference]: Without dead ends: 214 [2019-11-23 22:26:58,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:26:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-11-23 22:26:58,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-11-23 22:26:58,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-11-23 22:26:58,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions. [2019-11-23 22:26:58,272 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 175 [2019-11-23 22:26:58,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:58,272 INFO L462 AbstractCegarLoop]: Abstraction has 213 states and 246 transitions. [2019-11-23 22:26:58,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-23 22:26:58,273 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions. [2019-11-23 22:26:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-23 22:26:58,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:58,274 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:58,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:58,478 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash 147485214, now seen corresponding path program 2 times [2019-11-23 22:26:58,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:58,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617170139] [2019-11-23 22:26:58,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:26:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:58,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617170139] [2019-11-23 22:26:58,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028038373] [2019-11-23 22:26:58,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:59,083 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:26:59,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:26:59,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 22:26:59,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:26:59,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:26:59,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:26:59,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 22:26:59,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656405008] [2019-11-23 22:26:59,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:26:59,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:26:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:26:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:26:59,133 INFO L87 Difference]: Start difference. First operand 213 states and 246 transitions. Second operand 35 states. [2019-11-23 22:26:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:26:59,242 INFO L93 Difference]: Finished difference Result 364 states and 430 transitions. [2019-11-23 22:26:59,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 22:26:59,243 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 177 [2019-11-23 22:26:59,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:26:59,244 INFO L225 Difference]: With dead ends: 364 [2019-11-23 22:26:59,244 INFO L226 Difference]: Without dead ends: 216 [2019-11-23 22:26:59,247 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:26:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-23 22:26:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2019-11-23 22:26:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-23 22:26:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 248 transitions. [2019-11-23 22:26:59,258 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 248 transitions. Word has length 177 [2019-11-23 22:26:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:26:59,259 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 248 transitions. [2019-11-23 22:26:59,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:26:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 248 transitions. [2019-11-23 22:26:59,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-23 22:26:59,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:26:59,260 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:26:59,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:26:59,464 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:26:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:26:59,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1835346268, now seen corresponding path program 3 times [2019-11-23 22:26:59,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:26:59,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570804103] [2019-11-23 22:26:59,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:26:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-11-23 22:27:00,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570804103] [2019-11-23 22:27:00,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105253420] [2019-11-23 22:27:00,220 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:00,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 22:27:00,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:00,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:00,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1346 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1297 trivial. 0 not checked. [2019-11-23 22:27:00,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:00,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10] total 43 [2019-11-23 22:27:00,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527613687] [2019-11-23 22:27:00,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:27:00,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:00,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:27:00,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1167, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:00,853 INFO L87 Difference]: Start difference. First operand 215 states and 248 transitions. Second operand 43 states. [2019-11-23 22:27:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:01,053 INFO L93 Difference]: Finished difference Result 369 states and 436 transitions. [2019-11-23 22:27:01,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:27:01,054 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 179 [2019-11-23 22:27:01,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:01,055 INFO L225 Difference]: With dead ends: 369 [2019-11-23 22:27:01,055 INFO L226 Difference]: Without dead ends: 221 [2019-11-23 22:27:01,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=639, Invalid=1167, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2019-11-23 22:27:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 219. [2019-11-23 22:27:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2019-11-23 22:27:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 252 transitions. [2019-11-23 22:27:01,066 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 252 transitions. Word has length 179 [2019-11-23 22:27:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:01,066 INFO L462 AbstractCegarLoop]: Abstraction has 219 states and 252 transitions. [2019-11-23 22:27:01,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:27:01,066 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 252 transitions. [2019-11-23 22:27:01,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-23 22:27:01,067 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:01,068 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:01,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:01,272 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash 693916952, now seen corresponding path program 4 times [2019-11-23 22:27:01,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:01,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956971461] [2019-11-23 22:27:01,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:01,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 22:27:01,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956971461] [2019-11-23 22:27:01,990 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798535636] [2019-11-23 22:27:01,990 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:02,101 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:02,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:02,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:27:02,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 22:27:02,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:02,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-11-23 22:27:02,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487615656] [2019-11-23 22:27:02,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:27:02,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:27:02,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:27:02,142 INFO L87 Difference]: Start difference. First operand 219 states and 252 transitions. Second operand 37 states. [2019-11-23 22:27:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:02,254 INFO L93 Difference]: Finished difference Result 372 states and 438 transitions. [2019-11-23 22:27:02,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 22:27:02,255 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 183 [2019-11-23 22:27:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:02,256 INFO L225 Difference]: With dead ends: 372 [2019-11-23 22:27:02,256 INFO L226 Difference]: Without dead ends: 222 [2019-11-23 22:27:02,257 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:27:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-23 22:27:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2019-11-23 22:27:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-23 22:27:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 254 transitions. [2019-11-23 22:27:02,264 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 254 transitions. Word has length 183 [2019-11-23 22:27:02,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:02,264 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 254 transitions. [2019-11-23 22:27:02,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:27:02,265 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 254 transitions. [2019-11-23 22:27:02,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-23 22:27:02,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:02,266 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:02,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:02,470 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:02,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:02,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1768675882, now seen corresponding path program 5 times [2019-11-23 22:27:02,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:02,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336435747] [2019-11-23 22:27:02,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1493 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2019-11-23 22:27:03,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336435747] [2019-11-23 22:27:03,076 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455128844] [2019-11-23 22:27:03,076 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:25,862 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2019-11-23 22:27:25,863 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:25,877 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:27:25,879 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1493 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 1402 trivial. 0 not checked. [2019-11-23 22:27:26,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:26,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 10] total 45 [2019-11-23 22:27:26,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453529770] [2019-11-23 22:27:26,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:27:26,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:27:26,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=710, Invalid=1270, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:27:26,068 INFO L87 Difference]: Start difference. First operand 221 states and 254 transitions. Second operand 45 states. [2019-11-23 22:27:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:26,532 INFO L93 Difference]: Finished difference Result 402 states and 480 transitions. [2019-11-23 22:27:26,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:27:26,533 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 185 [2019-11-23 22:27:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:26,534 INFO L225 Difference]: With dead ends: 402 [2019-11-23 22:27:26,534 INFO L226 Difference]: Without dead ends: 252 [2019-11-23 22:27:26,535 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=710, Invalid=1270, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:27:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-11-23 22:27:26,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 239. [2019-11-23 22:27:26,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2019-11-23 22:27:26,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 276 transitions. [2019-11-23 22:27:26,545 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 276 transitions. Word has length 185 [2019-11-23 22:27:26,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:26,546 INFO L462 AbstractCegarLoop]: Abstraction has 239 states and 276 transitions. [2019-11-23 22:27:26,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:27:26,546 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 276 transitions. [2019-11-23 22:27:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-23 22:27:26,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:26,557 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:26,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:26,769 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:26,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:26,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1130725713, now seen corresponding path program 6 times [2019-11-23 22:27:26,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:26,770 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998195633] [2019-11-23 22:27:26,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-11-23 22:27:27,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998195633] [2019-11-23 22:27:27,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684867501] [2019-11-23 22:27:27,415 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:30,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 22:27:30,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:30,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:27:30,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 1529 trivial. 0 not checked. [2019-11-23 22:27:30,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:30,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 11] total 47 [2019-11-23 22:27:30,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227469354] [2019-11-23 22:27:30,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:27:30,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:30,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:27:30,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:27:30,826 INFO L87 Difference]: Start difference. First operand 239 states and 276 transitions. Second operand 47 states. [2019-11-23 22:27:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:31,220 INFO L93 Difference]: Finished difference Result 436 states and 522 transitions. [2019-11-23 22:27:31,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:27:31,221 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 199 [2019-11-23 22:27:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:31,223 INFO L225 Difference]: With dead ends: 436 [2019-11-23 22:27:31,223 INFO L226 Difference]: Without dead ends: 270 [2019-11-23 22:27:31,224 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=1405, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:27:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2019-11-23 22:27:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 257. [2019-11-23 22:27:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2019-11-23 22:27:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 298 transitions. [2019-11-23 22:27:31,232 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 298 transitions. Word has length 199 [2019-11-23 22:27:31,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:31,232 INFO L462 AbstractCegarLoop]: Abstraction has 257 states and 298 transitions. [2019-11-23 22:27:31,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:27:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 298 transitions. [2019-11-23 22:27:31,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-23 22:27:31,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:31,234 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:31,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:31,440 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:31,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1885640072, now seen corresponding path program 7 times [2019-11-23 22:27:31,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:31,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169167364] [2019-11-23 22:27:31,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:32,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169167364] [2019-11-23 22:27:32,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055274957] [2019-11-23 22:27:32,066 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:32,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-23 22:27:32,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1819 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:32,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:32,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-11-23 22:27:32,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668846590] [2019-11-23 22:27:32,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 22:27:32,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 22:27:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:27:32,243 INFO L87 Difference]: Start difference. First operand 257 states and 298 transitions. Second operand 40 states. [2019-11-23 22:27:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:32,376 INFO L93 Difference]: Finished difference Result 442 states and 524 transitions. [2019-11-23 22:27:32,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:27:32,377 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 213 [2019-11-23 22:27:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:32,378 INFO L225 Difference]: With dead ends: 442 [2019-11-23 22:27:32,378 INFO L226 Difference]: Without dead ends: 260 [2019-11-23 22:27:32,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 22:27:32,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-11-23 22:27:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2019-11-23 22:27:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-23 22:27:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 300 transitions. [2019-11-23 22:27:32,400 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 300 transitions. Word has length 213 [2019-11-23 22:27:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:32,400 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 300 transitions. [2019-11-23 22:27:32,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 22:27:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 300 transitions. [2019-11-23 22:27:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 22:27:32,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:32,402 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:32,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:32,606 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:32,606 INFO L82 PathProgramCache]: Analyzing trace with hash -892009018, now seen corresponding path program 8 times [2019-11-23 22:27:32,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:32,606 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190468093] [2019-11-23 22:27:32,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:33,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190468093] [2019-11-23 22:27:33,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128522946] [2019-11-23 22:27:33,258 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:33,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:27:33,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:33,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:27:33,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:33,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:33,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 22:27:33,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717282374] [2019-11-23 22:27:33,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:27:33,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:27:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:27:33,454 INFO L87 Difference]: Start difference. First operand 259 states and 300 transitions. Second operand 41 states. [2019-11-23 22:27:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:33,575 INFO L93 Difference]: Finished difference Result 444 states and 526 transitions. [2019-11-23 22:27:33,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:27:33,575 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2019-11-23 22:27:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:33,577 INFO L225 Difference]: With dead ends: 444 [2019-11-23 22:27:33,577 INFO L226 Difference]: Without dead ends: 262 [2019-11-23 22:27:33,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:27:33,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2019-11-23 22:27:33,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2019-11-23 22:27:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2019-11-23 22:27:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 302 transitions. [2019-11-23 22:27:33,585 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 302 transitions. Word has length 215 [2019-11-23 22:27:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:33,586 INFO L462 AbstractCegarLoop]: Abstraction has 261 states and 302 transitions. [2019-11-23 22:27:33,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:27:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 302 transitions. [2019-11-23 22:27:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-23 22:27:33,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:33,587 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:33,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:33,791 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:33,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:33,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1256873604, now seen corresponding path program 9 times [2019-11-23 22:27:33,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:33,793 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802224493] [2019-11-23 22:27:33,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-23 22:27:34,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802224493] [2019-11-23 22:27:34,475 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486582713] [2019-11-23 22:27:34,475 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:34,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 22:27:34,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:34,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 22:27:34,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2019-11-23 22:27:34,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:34,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 11] total 50 [2019-11-23 22:27:34,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535807701] [2019-11-23 22:27:34,974 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 22:27:34,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:34,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 22:27:34,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=1576, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:27:34,976 INFO L87 Difference]: Start difference. First operand 261 states and 302 transitions. Second operand 50 states. [2019-11-23 22:27:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:35,224 INFO L93 Difference]: Finished difference Result 449 states and 532 transitions. [2019-11-23 22:27:35,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-11-23 22:27:35,224 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 217 [2019-11-23 22:27:35,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:35,226 INFO L225 Difference]: With dead ends: 449 [2019-11-23 22:27:35,226 INFO L226 Difference]: Without dead ends: 267 [2019-11-23 22:27:35,227 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=874, Invalid=1576, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 22:27:35,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-11-23 22:27:35,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2019-11-23 22:27:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2019-11-23 22:27:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 306 transitions. [2019-11-23 22:27:35,245 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 306 transitions. Word has length 217 [2019-11-23 22:27:35,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:35,245 INFO L462 AbstractCegarLoop]: Abstraction has 265 states and 306 transitions. [2019-11-23 22:27:35,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 22:27:35,245 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 306 transitions. [2019-11-23 22:27:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-23 22:27:35,247 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:35,247 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:35,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:35,452 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2014811840, now seen corresponding path program 10 times [2019-11-23 22:27:35,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:35,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170451895] [2019-11-23 22:27:35,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 22:27:36,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170451895] [2019-11-23 22:27:36,148 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885912204] [2019-11-23 22:27:36,148 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:36,291 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:27:36,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:27:36,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:27:36,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:27:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2019-11-23 22:27:36,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:27:36,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-11-23 22:27:36,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272044841] [2019-11-23 22:27:36,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:27:36,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:27:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:27:36,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:36,339 INFO L87 Difference]: Start difference. First operand 265 states and 306 transitions. Second operand 43 states. [2019-11-23 22:27:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:27:36,483 INFO L93 Difference]: Finished difference Result 451 states and 533 transitions. [2019-11-23 22:27:36,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 22:27:36,483 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 221 [2019-11-23 22:27:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:27:36,484 INFO L225 Difference]: With dead ends: 451 [2019-11-23 22:27:36,485 INFO L226 Difference]: Without dead ends: 267 [2019-11-23 22:27:36,485 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:27:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2019-11-23 22:27:36,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2019-11-23 22:27:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2019-11-23 22:27:36,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 308 transitions. [2019-11-23 22:27:36,493 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 308 transitions. Word has length 221 [2019-11-23 22:27:36,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:27:36,493 INFO L462 AbstractCegarLoop]: Abstraction has 267 states and 308 transitions. [2019-11-23 22:27:36,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:27:36,493 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 308 transitions. [2019-11-23 22:27:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-23 22:27:36,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:27:36,495 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:27:36,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:27:36,699 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:27:36,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:27:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1266400126, now seen corresponding path program 11 times [2019-11-23 22:27:36,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:27:36,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128234037] [2019-11-23 22:27:36,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:27:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:27:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1987 trivial. 0 not checked. [2019-11-23 22:27:37,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128234037] [2019-11-23 22:27:37,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730339495] [2019-11-23 22:27:37,007 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true