/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:31,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:31,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:31,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:31,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:31,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:31,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:31,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:31,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:31,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:31,469 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:31,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:31,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:31,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:31,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:31,481 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:31,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:31,486 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:31,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:31,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:31,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:31,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:31,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:31,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:31,505 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:20:31,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:31,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:31,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:31,516 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:20:31,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:31,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:31,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:31,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:31,541 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:31,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:31,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:31,542 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:31,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:31,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:31,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:31,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:31,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:31,544 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:31,544 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:31,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:31,545 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:31,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:31,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:31,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:31,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:31,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:31,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:31,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:31,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:31,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:31,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:31,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:31,547 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:31,547 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:31,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:31,845 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:31,849 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:31,851 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:31,851 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:31,852 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-11-23 20:20:31,926 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/befbaef4c/27b93128899b424eae7db4decd1dde42/FLAG6dca59dbe [2019-11-23 20:20:32,361 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:32,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compare_ground.i [2019-11-23 20:20:32,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/befbaef4c/27b93128899b424eae7db4decd1dde42/FLAG6dca59dbe [2019-11-23 20:20:32,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/befbaef4c/27b93128899b424eae7db4decd1dde42 [2019-11-23 20:20:32,763 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:32,765 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:32,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:32,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:32,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:32,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:32" (1/1) ... [2019-11-23 20:20:32,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449a522b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:32, skipping insertion in model container [2019-11-23 20:20:32,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:32" (1/1) ... [2019-11-23 20:20:32,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:32,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:32,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:33,000 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:33,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:33,038 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:33,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33 WrapperNode [2019-11-23 20:20:33,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:33,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:33,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:33,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:33,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:33,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:33,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:33,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:33,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... [2019-11-23 20:20:33,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:33,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:33,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:33,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:33,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:33,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:33,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:33,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:33,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:33,519 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:33,519 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:20:33,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:33 BoogieIcfgContainer [2019-11-23 20:20:33,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:33,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:33,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:33,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:33,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:32" (1/3) ... [2019-11-23 20:20:33,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5546b0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:33, skipping insertion in model container [2019-11-23 20:20:33,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:33" (2/3) ... [2019-11-23 20:20:33,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5546b0ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:33, skipping insertion in model container [2019-11-23 20:20:33,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:33" (3/3) ... [2019-11-23 20:20:33,528 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2019-11-23 20:20:33,538 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:33,545 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:20:33,559 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:20:33,577 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:33,578 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:33,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:33,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:33,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:33,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:33,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:33,579 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-23 20:20:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:20:33,595 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,596 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,596 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2019-11-23 20:20:33,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696333948] [2019-11-23 20:20:33,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:33,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696333948] [2019-11-23 20:20:33,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:33,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:20:33,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295585545] [2019-11-23 20:20:33,754 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:20:33,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:20:33,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:33,773 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-23 20:20:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,796 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2019-11-23 20:20:33,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:20:33,798 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:20:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,809 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:20:33,810 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 20:20:33,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:20:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 20:20:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 20:20:33,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 20:20:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-23 20:20:33,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-23 20:20:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,857 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-23 20:20:33,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:20:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-23 20:20:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:20:33,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,862 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,864 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2015280042, now seen corresponding path program 1 times [2019-11-23 20:20:33,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612891863] [2019-11-23 20:20:33,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:33,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612891863] [2019-11-23 20:20:33,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:33,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:33,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665799331] [2019-11-23 20:20:33,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:33,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:33,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:33,966 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2019-11-23 20:20:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,016 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2019-11-23 20:20:34,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:34,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:20:34,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,018 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:20:34,018 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:20:34,020 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:20:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 20:20:34,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:20:34,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-23 20:20:34,024 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2019-11-23 20:20:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,025 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-23 20:20:34,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-23 20:20:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:20:34,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,026 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,026 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2019-11-23 20:20:34,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991742393] [2019-11-23 20:20:34,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:34,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991742393] [2019-11-23 20:20:34,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:34,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:34,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778431782] [2019-11-23 20:20:34,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:34,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:34,083 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-23 20:20:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,107 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-23 20:20:34,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:34,108 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:20:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,109 INFO L225 Difference]: With dead ends: 26 [2019-11-23 20:20:34,109 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 20:20:34,110 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 20:20:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-23 20:20:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:20:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:20:34,114 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:20:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,115 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:20:34,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:20:34,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:34,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,116 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2019-11-23 20:20:34,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171117564] [2019-11-23 20:20:34,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:34,154 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171117564] [2019-11-23 20:20:34,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:34,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:34,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523930474] [2019-11-23 20:20:34,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:34,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:34,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:34,159 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 3 states. [2019-11-23 20:20:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,182 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-11-23 20:20:34,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:34,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:20:34,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,184 INFO L225 Difference]: With dead ends: 27 [2019-11-23 20:20:34,184 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:20:34,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:20:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:20:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:20:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-23 20:20:34,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-23 20:20:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,193 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-23 20:20:34,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-23 20:20:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:34,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,195 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,196 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,196 INFO L82 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2019-11-23 20:20:34,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131171097] [2019-11-23 20:20:34,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:34,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131171097] [2019-11-23 20:20:34,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068569499] [2019-11-23 20:20:34,282 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:34,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:20:34,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641774092] [2019-11-23 20:20:34,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:20:34,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:20:34,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:34,406 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-11-23 20:20:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,430 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-23 20:20:34,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:34,431 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:20:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,431 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:20:34,431 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:20:34,432 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:34,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:20:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:20:34,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:20:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-23 20:20:34,436 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2019-11-23 20:20:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,437 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-23 20:20:34,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:20:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-23 20:20:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:20:34,438 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,438 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,641 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1017926315, now seen corresponding path program 2 times [2019-11-23 20:20:34,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,643 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417941126] [2019-11-23 20:20:34,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:34,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417941126] [2019-11-23 20:20:34,746 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628442745] [2019-11-23 20:20:34,746 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:34,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:34,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:34,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:20:34,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787410813] [2019-11-23 20:20:34,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:20:34,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:20:34,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:20:34,833 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-11-23 20:20:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,864 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-23 20:20:34,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:20:34,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2019-11-23 20:20:34,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,867 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:20:34,867 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:20:34,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:20:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:20:34,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 20:20:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:20:34,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:20:34,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-23 20:20:34,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,872 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:20:34,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:20:34,873 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:20:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:20:34,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,874 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,077 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,078 INFO L82 PathProgramCache]: Analyzing trace with hash 871153239, now seen corresponding path program 3 times [2019-11-23 20:20:35,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178787336] [2019-11-23 20:20:35,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:35,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178787336] [2019-11-23 20:20:35,178 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187349943] [2019-11-23 20:20:35,178 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:20:35,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:35,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:35,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:20:35,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:35,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:20:35,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21909436] [2019-11-23 20:20:35,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:35,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:35,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:35,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:35,248 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2019-11-23 20:20:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:35,303 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-11-23 20:20:35,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:20:35,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-23 20:20:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:35,305 INFO L225 Difference]: With dead ends: 41 [2019-11-23 20:20:35,305 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:20:35,306 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:20:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2019-11-23 20:20:35,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:20:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:20:35,310 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2019-11-23 20:20:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:35,311 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:20:35,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:20:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:20:35,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:35,312 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,516 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1490658194, now seen corresponding path program 4 times [2019-11-23 20:20:35,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,517 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949416932] [2019-11-23 20:20:35,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:35,613 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949416932] [2019-11-23 20:20:35,614 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869246080] [2019-11-23 20:20:35,614 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:35,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:35,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:35,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:35,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:35,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:20:35,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002553330] [2019-11-23 20:20:35,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:35,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:35,682 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2019-11-23 20:20:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:35,721 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2019-11-23 20:20:35,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:35,722 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:20:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:35,722 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:20:35,722 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:20:35,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:20:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:20:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:20:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 20:20:35,728 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-23 20:20:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:35,728 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 20:20:35,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 20:20:35,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:20:35,730 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:35,730 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,935 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,935 INFO L82 PathProgramCache]: Analyzing trace with hash -869628628, now seen corresponding path program 5 times [2019-11-23 20:20:35,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,935 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565114184] [2019-11-23 20:20:35,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:20:36,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565114184] [2019-11-23 20:20:36,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088025586] [2019-11-23 20:20:36,039 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,135 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:20:36,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:20:36,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:20:36,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828511150] [2019-11-23 20:20:36,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:36,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:36,180 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2019-11-23 20:20:36,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,248 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2019-11-23 20:20:36,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:36,248 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-23 20:20:36,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,249 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:20:36,249 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:20:36,250 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:36,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:20:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2019-11-23 20:20:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 20:20:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-11-23 20:20:36,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 25 [2019-11-23 20:20:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,256 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-11-23 20:20:36,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-11-23 20:20:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:20:36,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,257 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,462 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash -85588163, now seen corresponding path program 6 times [2019-11-23 20:20:36,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174191849] [2019-11-23 20:20:36,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:20:36,587 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174191849] [2019-11-23 20:20:36,588 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903320667] [2019-11-23 20:20:36,588 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:20:36,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,681 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:20:36,682 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:20:36,689 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:20:36,690 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:20:36,690 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:20:36,831 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2019-11-23 20:20:36,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-11-23 20:20:36,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147293355] [2019-11-23 20:20:36,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:20:36,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:20:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:20:36,860 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2019-11-23 20:20:37,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,283 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-11-23 20:20:37,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:37,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-11-23 20:20:37,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,284 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:20:37,284 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:20:37,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:20:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:20:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-11-23 20:20:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:20:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-23 20:20:37,295 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 30 [2019-11-23 20:20:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,295 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-23 20:20:37,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:20:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-23 20:20:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:20:37,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,299 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:37,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,500 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1325102645, now seen corresponding path program 1 times [2019-11-23 20:20:37,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:37,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417156811] [2019-11-23 20:20:37,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:37,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417156811] [2019-11-23 20:20:37,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17081866] [2019-11-23 20:20:37,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:37,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:37,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:20:37,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295347596] [2019-11-23 20:20:37,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:37,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:37,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:37,671 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2019-11-23 20:20:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,712 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2019-11-23 20:20:37,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:20:37,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-11-23 20:20:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,714 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:20:37,714 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:20:37,715 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:20:37,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-11-23 20:20:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:20:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-23 20:20:37,720 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2019-11-23 20:20:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,721 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-23 20:20:37,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-23 20:20:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:20:37,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,722 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:37,922 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,923 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1164709321, now seen corresponding path program 2 times [2019-11-23 20:20:37,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:37,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720263067] [2019-11-23 20:20:37,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:38,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720263067] [2019-11-23 20:20:38,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774682323] [2019-11-23 20:20:38,040 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:38,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:38,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:38,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:38,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:38,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:20:38,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499883025] [2019-11-23 20:20:38,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:38,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:38,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:38,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:38,140 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2019-11-23 20:20:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:38,190 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2019-11-23 20:20:38,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:38,191 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-11-23 20:20:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:38,192 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:20:38,192 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:20:38,192 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:20:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-23 20:20:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:20:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-23 20:20:38,198 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2019-11-23 20:20:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:38,198 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-23 20:20:38,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-23 20:20:38,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:20:38,199 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:38,199 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,402 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,402 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1577224775, now seen corresponding path program 3 times [2019-11-23 20:20:38,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852969857] [2019-11-23 20:20:38,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:20:38,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852969857] [2019-11-23 20:20:38,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131056158] [2019-11-23 20:20:38,504 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,556 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:20:38,556 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:38,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:38,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-11-23 20:20:38,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:38,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-11-23 20:20:38,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909950351] [2019-11-23 20:20:38,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:20:38,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:20:38,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:20:38,623 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2019-11-23 20:20:38,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:38,711 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2019-11-23 20:20:38,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:20:38,712 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2019-11-23 20:20:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:38,712 INFO L225 Difference]: With dead ends: 69 [2019-11-23 20:20:38,712 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:20:38,713 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:20:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:20:38,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2019-11-23 20:20:38,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:20:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-23 20:20:38,719 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2019-11-23 20:20:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:38,719 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-23 20:20:38,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:20:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-23 20:20:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:20:38,720 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:38,720 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,924 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash 246043000, now seen corresponding path program 4 times [2019-11-23 20:20:38,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,925 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948493107] [2019-11-23 20:20:38,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:39,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948493107] [2019-11-23 20:20:39,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669605827] [2019-11-23 20:20:39,039 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 20:20:39,095 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:39,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:39,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:39,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:39,123 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:39,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:39,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:20:39,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840168830] [2019-11-23 20:20:39,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:20:39,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:20:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:39,126 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 14 states. [2019-11-23 20:20:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:39,186 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2019-11-23 20:20:39,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:20:39,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2019-11-23 20:20:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:39,187 INFO L225 Difference]: With dead ends: 72 [2019-11-23 20:20:39,188 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:20:39,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:20:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-11-23 20:20:39,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:20:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-23 20:20:39,195 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2019-11-23 20:20:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:39,195 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-23 20:20:39,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:20:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-23 20:20:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:20:39,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:39,196 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:39,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:39,400 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1452263498, now seen corresponding path program 5 times [2019-11-23 20:20:39,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:39,402 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597742493] [2019-11-23 20:20:39,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:39,540 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-23 20:20:39,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597742493] [2019-11-23 20:20:39,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070348713] [2019-11-23 20:20:39,541 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 20:20:40,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:20:40,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:40,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:40,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-23 20:20:41,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:41,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-23 20:20:41,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845183706] [2019-11-23 20:20:41,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:20:41,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:41,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:20:41,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:20:41,085 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2019-11-23 20:20:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:41,189 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2019-11-23 20:20:41,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:20:41,190 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2019-11-23 20:20:41,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:41,190 INFO L225 Difference]: With dead ends: 79 [2019-11-23 20:20:41,190 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:20:41,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:20:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:20:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2019-11-23 20:20:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:20:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-11-23 20:20:41,197 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 47 [2019-11-23 20:20:41,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:41,198 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-11-23 20:20:41,198 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:20:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-11-23 20:20:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:20:41,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:41,199 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:41,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:41,404 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:41,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1409738015, now seen corresponding path program 6 times [2019-11-23 20:20:41,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:41,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376798737] [2019-11-23 20:20:41,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:41,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376798737] [2019-11-23 20:20:41,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780881632] [2019-11-23 20:20:41,569 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 20:20:42,252 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-23 20:20:42,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:42,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:42,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:42,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:42,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-23 20:20:42,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597372882] [2019-11-23 20:20:42,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:20:42,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:42,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:20:42,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:42,352 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2019-11-23 20:20:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,445 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2019-11-23 20:20:42,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:20:42,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2019-11-23 20:20:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,447 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:20:42,447 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:20:42,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:20:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-23 20:20:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:20:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2019-11-23 20:20:42,454 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2019-11-23 20:20:42,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,455 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2019-11-23 20:20:42,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:20:42,455 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2019-11-23 20:20:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:20:42,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,456 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:42,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:42,662 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:42,662 INFO L82 PathProgramCache]: Analyzing trace with hash -599772334, now seen corresponding path program 7 times [2019-11-23 20:20:42,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:42,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298560350] [2019-11-23 20:20:42,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:42,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298560350] [2019-11-23 20:20:42,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737508735] [2019-11-23 20:20:42,830 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 20:20:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:42,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:42,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:42,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:42,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:20:42,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547120390] [2019-11-23 20:20:42,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:42,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:42,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:42,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:42,907 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 17 states. [2019-11-23 20:20:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,975 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2019-11-23 20:20:42,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:20:42,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2019-11-23 20:20:42,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,978 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:20:42,978 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:20:42,979 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:20:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-11-23 20:20:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-23 20:20:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-23 20:20:42,984 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2019-11-23 20:20:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,985 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-23 20:20:42,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-23 20:20:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:20:42,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,986 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,190 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,191 INFO L82 PathProgramCache]: Analyzing trace with hash -216486768, now seen corresponding path program 8 times [2019-11-23 20:20:43,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757165063] [2019-11-23 20:20:43,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:43,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757165063] [2019-11-23 20:20:43,365 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249420567] [2019-11-23 20:20:43,365 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 20:20:43,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:43,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:43,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:43,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:43,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:43,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:20:43,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261107895] [2019-11-23 20:20:43,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:20:43,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:43,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:20:43,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:43,447 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 18 states. [2019-11-23 20:20:43,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:43,509 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2019-11-23 20:20:43,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:43,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2019-11-23 20:20:43,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:43,510 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:20:43,510 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 20:20:43,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 20:20:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-23 20:20:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:20:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:20:43,521 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 59 [2019-11-23 20:20:43,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:43,522 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:20:43,522 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:20:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:20:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:20:43,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:43,525 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,726 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1246245298, now seen corresponding path program 9 times [2019-11-23 20:20:43,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044683012] [2019-11-23 20:20:43,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-11-23 20:20:43,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044683012] [2019-11-23 20:20:43,926 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722674831] [2019-11-23 20:20:43,926 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 20:20:43,994 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:20:43,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:43,996 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:20:43,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:44,004 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:20:44,005 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:20:44,013 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:20:44,014 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:20:44,014 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 20:20:44,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-23 20:20:44,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:44,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2019-11-23 20:20:44,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956748323] [2019-11-23 20:20:44,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:20:44,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:20:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:20:44,265 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 27 states. [2019-11-23 20:20:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:45,121 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2019-11-23 20:20:45,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:20:45,121 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2019-11-23 20:20:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:45,122 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:20:45,122 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:20:45,124 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=512, Invalid=1744, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:20:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:20:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2019-11-23 20:20:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:20:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-11-23 20:20:45,130 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 61 [2019-11-23 20:20:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:45,130 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-11-23 20:20:45,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:20:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-11-23 20:20:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:20:45,131 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:45,132 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:45,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:45,335 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1714951042, now seen corresponding path program 10 times [2019-11-23 20:20:45,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:45,336 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038005882] [2019-11-23 20:20:45,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:20:45,519 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038005882] [2019-11-23 20:20:45,520 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425520517] [2019-11-23 20:20:45,520 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 20:20:45,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:45,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:45,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:20:45,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:20:45,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:45,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:20:45,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497502968] [2019-11-23 20:20:45,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:45,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:45,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:45,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:45,610 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2019-11-23 20:20:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:45,671 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2019-11-23 20:20:45,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:20:45,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2019-11-23 20:20:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:45,673 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:20:45,673 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 20:20:45,673 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 20:20:45,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2019-11-23 20:20:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:20:45,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:20:45,678 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2019-11-23 20:20:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:45,678 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:20:45,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:45,679 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:20:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:20:45,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:45,679 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:45,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:45,888 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash -152004800, now seen corresponding path program 11 times [2019-11-23 20:20:45,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:45,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440273707] [2019-11-23 20:20:45,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:20:46,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440273707] [2019-11-23 20:20:46,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958990961] [2019-11-23 20:20:46,103 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 20:20:49,492 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 20:20:49,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:49,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:20:49,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:20:49,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:49,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-23 20:20:49,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036140133] [2019-11-23 20:20:49,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 20:20:49,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:49,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 20:20:49,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:49,516 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 21 states. [2019-11-23 20:20:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:49,585 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2019-11-23 20:20:49,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:20:49,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2019-11-23 20:20:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:49,586 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:20:49,586 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:20:49,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:49,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:20:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-11-23 20:20:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:20:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-11-23 20:20:49,591 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2019-11-23 20:20:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:49,591 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-11-23 20:20:49,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 20:20:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-11-23 20:20:49,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:20:49,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:49,592 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:49,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:49,793 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 999760766, now seen corresponding path program 12 times [2019-11-23 20:20:49,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:49,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137113861] [2019-11-23 20:20:49,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2019-11-23 20:20:50,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137113861] [2019-11-23 20:20:50,001 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790904670] [2019-11-23 20:20:50,001 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 20:20:51,601 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:20:51,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:51,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:51,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2019-11-23 20:20:51,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:51,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-23 20:20:51,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549691166] [2019-11-23 20:20:51,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-23 20:20:51,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:51,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-23 20:20:51,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:20:51,728 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 28 states. [2019-11-23 20:20:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:51,850 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2019-11-23 20:20:51,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:20:51,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2019-11-23 20:20:51,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:51,852 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:20:51,852 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:20:51,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:20:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:20:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2019-11-23 20:20:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:20:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-11-23 20:20:51,857 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 71 [2019-11-23 20:20:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:51,857 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-11-23 20:20:51,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-23 20:20:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-11-23 20:20:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:20:51,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:51,858 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:52,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:52,059 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:52,059 INFO L82 PathProgramCache]: Analyzing trace with hash -42628477, now seen corresponding path program 13 times [2019-11-23 20:20:52,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:52,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841484936] [2019-11-23 20:20:52,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:20:52,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841484936] [2019-11-23 20:20:52,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211848027] [2019-11-23 20:20:52,311 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 20:20:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:52,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:20:52,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:52,424 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:20:52,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:52,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:20:52,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37990133] [2019-11-23 20:20:52,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:20:52,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:20:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:52,428 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 23 states. [2019-11-23 20:20:52,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:52,513 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2019-11-23 20:20:52,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:20:52,513 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2019-11-23 20:20:52,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:52,514 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:20:52,514 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:20:52,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:52,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:20:52,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-23 20:20:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:20:52,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2019-11-23 20:20:52,519 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2019-11-23 20:20:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:52,519 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2019-11-23 20:20:52,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:20:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2019-11-23 20:20:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 20:20:52,520 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:52,521 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:52,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:52,725 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1625138043, now seen corresponding path program 14 times [2019-11-23 20:20:52,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:52,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618197523] [2019-11-23 20:20:52,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:20:52,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618197523] [2019-11-23 20:20:52,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874897236] [2019-11-23 20:20:52,969 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 20:20:53,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:53,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:53,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:20:53,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:53,058 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:20:53,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:53,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:20:53,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181453954] [2019-11-23 20:20:53,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:20:53,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:20:53,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:53,060 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 24 states. [2019-11-23 20:20:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:53,161 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2019-11-23 20:20:53,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:20:53,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2019-11-23 20:20:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:53,164 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:20:53,164 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:20:53,165 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:53,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:20:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-11-23 20:20:53,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:20:53,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2019-11-23 20:20:53,169 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2019-11-23 20:20:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:53,169 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2019-11-23 20:20:53,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:20:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2019-11-23 20:20:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:20:53,170 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:53,170 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 7, 7, 7, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:53,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:53,374 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1998408185, now seen corresponding path program 15 times [2019-11-23 20:20:53,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:53,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117985410] [2019-11-23 20:20:53,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-23 20:20:53,663 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117985410] [2019-11-23 20:20:53,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320887773] [2019-11-23 20:20:53,664 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 20:20:53,775 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-23 20:20:53,775 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:53,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:53,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2019-11-23 20:20:53,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:53,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10] total 32 [2019-11-23 20:20:53,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002431959] [2019-11-23 20:20:53,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:20:53,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:20:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:20:53,923 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 32 states. [2019-11-23 20:20:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:54,047 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2019-11-23 20:20:54,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:20:54,047 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 80 [2019-11-23 20:20:54,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:54,048 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:20:54,048 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:20:54,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:20:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:20:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-23 20:20:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:20:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2019-11-23 20:20:54,053 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 80 [2019-11-23 20:20:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:54,053 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2019-11-23 20:20:54,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:20:54,054 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2019-11-23 20:20:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:20:54,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:54,054 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:54,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:54,258 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash -756097898, now seen corresponding path program 16 times [2019-11-23 20:20:54,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:54,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540828375] [2019-11-23 20:20:54,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:20:54,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540828375] [2019-11-23 20:20:54,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291936935] [2019-11-23 20:20:54,566 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 20:20:54,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:54,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:54,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:20:54,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:20:54,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:54,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:20:54,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841699688] [2019-11-23 20:20:54,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:20:54,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:54,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:20:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:54,669 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 26 states. [2019-11-23 20:20:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:54,772 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2019-11-23 20:20:54,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:20:54,772 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 85 [2019-11-23 20:20:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:54,773 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:20:54,773 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:20:54,773 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:20:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-11-23 20:20:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:20:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2019-11-23 20:20:54,778 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 85 [2019-11-23 20:20:54,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:54,778 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2019-11-23 20:20:54,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:20:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2019-11-23 20:20:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-23 20:20:54,779 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:54,779 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 8, 8, 8, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:54,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:54,982 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:54,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:54,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2048994516, now seen corresponding path program 17 times [2019-11-23 20:20:54,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:54,983 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145657403] [2019-11-23 20:20:54,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-23 20:20:55,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145657403] [2019-11-23 20:20:55,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530638025] [2019-11-23 20:20:55,330 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 20:21:33,112 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 20:21:33,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:33,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:21:33,133 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2019-11-23 20:21:33,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:33,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11] total 35 [2019-11-23 20:21:33,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535573340] [2019-11-23 20:21:33,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:21:33,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:33,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:21:33,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:21:33,337 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 35 states. [2019-11-23 20:21:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:33,471 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2019-11-23 20:21:33,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:21:33,472 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2019-11-23 20:21:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:33,473 INFO L225 Difference]: With dead ends: 135 [2019-11-23 20:21:33,473 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:21:33,474 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=811, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:21:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:21:33,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2019-11-23 20:21:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 20:21:33,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2019-11-23 20:21:33,481 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 87 [2019-11-23 20:21:33,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:33,481 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2019-11-23 20:21:33,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:21:33,481 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2019-11-23 20:21:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-23 20:21:33,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:33,482 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 9, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:33,699 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:33,699 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1323780755, now seen corresponding path program 18 times [2019-11-23 20:21:33,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:33,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597423820] [2019-11-23 20:21:33,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2019-11-23 20:21:34,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597423820] [2019-11-23 20:21:34,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899026077] [2019-11-23 20:21:34,022 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 20:21:38,591 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-23 20:21:38,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:38,595 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-23 20:21:38,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:38,601 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:21:38,601 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:21:38,606 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:21:38,607 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:21:38,607 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 20:21:38,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 701 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2019-11-23 20:21:38,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:38,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 12] total 37 [2019-11-23 20:21:38,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879268611] [2019-11-23 20:21:38,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:21:38,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:38,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:21:38,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=953, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:21:38,983 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 37 states. [2019-11-23 20:21:40,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:40,507 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2019-11-23 20:21:40,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 20:21:40,507 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 92 [2019-11-23 20:21:40,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:40,509 INFO L225 Difference]: With dead ends: 145 [2019-11-23 20:21:40,509 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:21:40,511 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1117, Invalid=3575, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 20:21:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:21:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2019-11-23 20:21:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:21:40,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2019-11-23 20:21:40,516 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 92 [2019-11-23 20:21:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:40,516 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2019-11-23 20:21:40,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:21:40,517 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2019-11-23 20:21:40,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-23 20:21:40,517 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:40,517 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 9, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:40,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:40,718 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:40,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:40,719 INFO L82 PathProgramCache]: Analyzing trace with hash 283227365, now seen corresponding path program 19 times [2019-11-23 20:21:40,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:40,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762126503] [2019-11-23 20:21:40,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-23 20:21:41,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762126503] [2019-11-23 20:21:41,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112542683] [2019-11-23 20:21:41,041 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:41,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:21:41,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-23 20:21:41,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:41,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:21:41,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380732069] [2019-11-23 20:21:41,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:21:41,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:41,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:21:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:21:41,156 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 29 states. [2019-11-23 20:21:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:41,250 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2019-11-23 20:21:41,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:21:41,251 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 98 [2019-11-23 20:21:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:41,252 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:21:41,252 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:21:41,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:21:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:21:41,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2019-11-23 20:21:41,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-23 20:21:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2019-11-23 20:21:41,259 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2019-11-23 20:21:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:41,259 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2019-11-23 20:21:41,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:21:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2019-11-23 20:21:41,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 20:21:41,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:41,260 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 9, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:41,463 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:41,463 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:41,463 INFO L82 PathProgramCache]: Analyzing trace with hash 765999463, now seen corresponding path program 20 times [2019-11-23 20:21:41,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:41,464 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524421355] [2019-11-23 20:21:41,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-23 20:21:41,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524421355] [2019-11-23 20:21:41,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041871620] [2019-11-23 20:21:41,829 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 20:21:41,912 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:41,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:41,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:21:41,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-23 20:21:41,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:41,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:21:41,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717284599] [2019-11-23 20:21:41,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:21:41,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:21:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:21:41,935 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 30 states. [2019-11-23 20:21:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:42,041 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2019-11-23 20:21:42,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:21:42,042 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2019-11-23 20:21:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:42,043 INFO L225 Difference]: With dead ends: 150 [2019-11-23 20:21:42,043 INFO L226 Difference]: Without dead ends: 104 [2019-11-23 20:21:42,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:21:42,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-23 20:21:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-23 20:21:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-23 20:21:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2019-11-23 20:21:42,048 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2019-11-23 20:21:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:42,049 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2019-11-23 20:21:42,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:21:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2019-11-23 20:21:42,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-23 20:21:42,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:42,050 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 9, 9, 9, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:42,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:42,253 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 853517673, now seen corresponding path program 21 times [2019-11-23 20:21:42,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:42,255 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668501893] [2019-11-23 20:21:42,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-11-23 20:21:42,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668501893] [2019-11-23 20:21:42,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926620519] [2019-11-23 20:21:42,796 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 20:21:43,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:21:43,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:43,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:21:43,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 53 proven. 117 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2019-11-23 20:21:43,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:43,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 14] total 42 [2019-11-23 20:21:43,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100370241] [2019-11-23 20:21:43,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:21:43,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:43,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:21:43,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:21:43,417 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 42 states. [2019-11-23 20:21:43,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:43,822 INFO L93 Difference]: Finished difference Result 158 states and 164 transitions. [2019-11-23 20:21:43,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:21:43,823 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2019-11-23 20:21:43,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:43,824 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:21:43,824 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:21:43,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=691, Invalid=1961, Unknown=0, NotChecked=0, Total=2652 [2019-11-23 20:21:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:21:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2019-11-23 20:21:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-11-23 20:21:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2019-11-23 20:21:43,830 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 102 [2019-11-23 20:21:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:43,830 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2019-11-23 20:21:43,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:21:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2019-11-23 20:21:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-23 20:21:43,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:43,831 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:44,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:44,035 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:44,036 INFO L82 PathProgramCache]: Analyzing trace with hash -221021346, now seen corresponding path program 22 times [2019-11-23 20:21:44,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:44,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128466077] [2019-11-23 20:21:44,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 20:21:44,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128466077] [2019-11-23 20:21:44,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142840876] [2019-11-23 20:21:44,571 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:44,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:44,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:44,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 20:21:44,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1004 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 20:21:44,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:44,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-11-23 20:21:44,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685773781] [2019-11-23 20:21:44,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:21:44,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:21:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:21:44,681 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 33 states. [2019-11-23 20:21:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:44,808 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2019-11-23 20:21:44,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 20:21:44,811 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 109 [2019-11-23 20:21:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:44,812 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:21:44,812 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:21:44,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:21:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:21:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-11-23 20:21:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-23 20:21:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2019-11-23 20:21:44,818 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 109 [2019-11-23 20:21:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:44,818 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2019-11-23 20:21:44,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:21:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2019-11-23 20:21:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-23 20:21:44,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:44,819 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 10, 10, 10, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:45,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:45,023 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1077382756, now seen corresponding path program 23 times [2019-11-23 20:21:45,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:45,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454286941] [2019-11-23 20:21:45,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2019-11-23 20:21:45,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454286941] [2019-11-23 20:21:45,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995893832] [2019-11-23 20:21:45,457 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 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