java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:12:34,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:12:34,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:12:34,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:12:34,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:12:34,504 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:12:34,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:12:34,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:12:34,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:12:34,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:12:34,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:12:34,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:12:34,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:12:34,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:12:34,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:12:34,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:12:34,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:12:34,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:12:34,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:12:34,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:12:34,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:12:34,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:12:34,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:12:34,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:12:34,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:12:34,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:12:34,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:12:34,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:12:34,543 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 [2019-09-08 06:12:34,558 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:12:34,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:12:34,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:12:34,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:12:34,560 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:12:34,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:12:34,561 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:12:34,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:12:34,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:12:34,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:12:34,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:12:34,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:12:34,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:12:34,562 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:12:34,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:12:34,562 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:12:34,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:12:34,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:12:34,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:12:34,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:12:34,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:12:34,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:12:34,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:12:34,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:12:34,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:12:34,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:12:34,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:12:34,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:12:34,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:12:34,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:12:34,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:12:34,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:12:34,622 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:12:34,622 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:12:34,623 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2019-09-08 06:12:34,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97734bacf/4b7a2362910642c7bb8c75c4c944e9e5/FLAG11405b05f [2019-09-08 06:12:35,118 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:12:35,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2019-09-08 06:12:35,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97734bacf/4b7a2362910642c7bb8c75c4c944e9e5/FLAG11405b05f [2019-09-08 06:12:35,532 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97734bacf/4b7a2362910642c7bb8c75c4c944e9e5 [2019-09-08 06:12:35,543 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:12:35,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:12:35,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:35,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:12:35,549 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:12:35,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:35,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97b20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35, skipping insertion in model container [2019-09-08 06:12:35,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:35,561 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:12:35,579 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:12:35,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:35,802 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:12:35,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:12:35,840 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:12:35,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35 WrapperNode [2019-09-08 06:12:35,842 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:12:35,843 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:12:35,843 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:12:35,843 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:12:36,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (1/1) ... [2019-09-08 06:12:36,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:12:36,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:12:36,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:12:36,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:12:36,031 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (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 [2019-09-08 06:12:36,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:12:36,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:12:36,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2019-09-08 06:12:36,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2019-09-08 06:12:36,091 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:12:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:12:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:12:36,091 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2019-09-08 06:12:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2019-09-08 06:12:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:12:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:12:36,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:12:36,324 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:12:36,325 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:12:36,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:36 BoogieIcfgContainer [2019-09-08 06:12:36,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:12:36,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:12:36,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:12:36,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:12:36,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:12:35" (1/3) ... [2019-09-08 06:12:36,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c803cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:36, skipping insertion in model container [2019-09-08 06:12:36,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:12:35" (2/3) ... [2019-09-08 06:12:36,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c803cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:12:36, skipping insertion in model container [2019-09-08 06:12:36,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:12:36" (3/3) ... [2019-09-08 06:12:36,353 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2019-09-08 06:12:36,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:12:36,391 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:12:36,411 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:12:36,440 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:12:36,441 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:12:36,441 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:12:36,441 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:12:36,442 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:12:36,442 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:12:36,442 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:12:36,442 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:12:36,442 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:12:36,459 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-08 06:12:36,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:12:36,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:36,466 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:36,468 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2019-09-08 06:12:36,476 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:36,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:36,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:36,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:36,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:12:36,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:36,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-08 06:12:36,789 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:12:36,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:12:36,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:12:36,803 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 7 states. [2019-09-08 06:12:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:36,958 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2019-09-08 06:12:36,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:12:36,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-08 06:12:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:36,974 INFO L225 Difference]: With dead ends: 41 [2019-09-08 06:12:36,974 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 06:12:36,985 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:12:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 06:12:37,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 06:12:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:12:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-08 06:12:37,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2019-09-08 06:12:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:37,052 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-08 06:12:37,052 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:12:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-08 06:12:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-08 06:12:37,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:37,056 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:37,057 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2019-09-08 06:12:37,060 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:37,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:37,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:37,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:12:37,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:37,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-08 06:12:37,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:12:37,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:12:37,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:12:37,258 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2019-09-08 06:12:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:37,356 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-08 06:12:37,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:12:37,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-09-08 06:12:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:37,358 INFO L225 Difference]: With dead ends: 33 [2019-09-08 06:12:37,358 INFO L226 Difference]: Without dead ends: 29 [2019-09-08 06:12:37,359 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:12:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-08 06:12:37,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-09-08 06:12:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:12:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-08 06:12:37,367 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2019-09-08 06:12:37,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:37,368 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-08 06:12:37,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:12:37,368 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-08 06:12:37,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-08 06:12:37,369 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:37,369 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:37,370 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:37,370 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2019-09-08 06:12:37,370 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:37,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:37,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:37,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:12:37,554 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:37,554 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-08 06:12:37,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:12:37,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:12:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:12:37,555 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 9 states. [2019-09-08 06:12:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:37,728 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-09-08 06:12:37,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 06:12:37,730 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-09-08 06:12:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:37,732 INFO L225 Difference]: With dead ends: 39 [2019-09-08 06:12:37,732 INFO L226 Difference]: Without dead ends: 29 [2019-09-08 06:12:37,733 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:12:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-08 06:12:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-09-08 06:12:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:12:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-09-08 06:12:37,747 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2019-09-08 06:12:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:37,748 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-09-08 06:12:37,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:12:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-09-08 06:12:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-08 06:12:37,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:37,759 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:37,760 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2019-09-08 06:12:37,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:37,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:37,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:37,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:12:38,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:38,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-09-08 06:12:38,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:12:38,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:12:38,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:12:38,112 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 12 states. [2019-09-08 06:12:38,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:38,360 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-09-08 06:12:38,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:12:38,360 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-09-08 06:12:38,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:38,362 INFO L225 Difference]: With dead ends: 38 [2019-09-08 06:12:38,363 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:12:38,364 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:12:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:12:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-09-08 06:12:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:12:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-08 06:12:38,371 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2019-09-08 06:12:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:38,372 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-08 06:12:38,372 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:12:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-08 06:12:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-08 06:12:38,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:38,373 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:38,374 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:38,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2019-09-08 06:12:38,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:38,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:38,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:38,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:12:38,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:12:38,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-09-08 06:12:38,535 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:12:38,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:12:38,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:12:38,536 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 12 states. [2019-09-08 06:12:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:38,730 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2019-09-08 06:12:38,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:12:38,731 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-09-08 06:12:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:38,732 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:12:38,732 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:12:38,733 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:12:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:12:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:12:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:12:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-08 06:12:38,739 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2019-09-08 06:12:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:38,740 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-08 06:12:38,740 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:12:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-08 06:12:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-08 06:12:38,741 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:38,742 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:38,742 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2019-09-08 06:12:38,743 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:38,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:38,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,744 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:38,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-08 06:12:39,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:39,004 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:39,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:12:39,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:39,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:39,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-08 06:12:39,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:39,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-08 06:12:39,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:12:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:12:39,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:12:39,294 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 13 states. [2019-09-08 06:12:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:39,543 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-09-08 06:12:39,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:12:39,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-09-08 06:12:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:39,545 INFO L225 Difference]: With dead ends: 42 [2019-09-08 06:12:39,545 INFO L226 Difference]: Without dead ends: 38 [2019-09-08 06:12:39,546 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:12:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-08 06:12:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-09-08 06:12:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 06:12:39,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-09-08 06:12:39,552 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2019-09-08 06:12:39,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:39,552 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-09-08 06:12:39,552 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:12:39,552 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-09-08 06:12:39,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-08 06:12:39,554 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:39,554 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:39,554 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:39,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2019-09-08 06:12:39,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:39,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:12:39,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:39,796 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:39,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:39,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-08 06:12:39,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:40,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:40,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:12:40,180 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:40,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2019-09-08 06:12:40,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:12:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:12:40,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:12:40,182 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2019-09-08 06:12:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:40,549 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2019-09-08 06:12:40,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:12:40,549 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 36 [2019-09-08 06:12:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:40,551 INFO L225 Difference]: With dead ends: 48 [2019-09-08 06:12:40,551 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:12:40,552 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:12:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:12:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2019-09-08 06:12:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 06:12:40,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-08 06:12:40,558 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2019-09-08 06:12:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:40,558 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-08 06:12:40,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:12:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-08 06:12:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 06:12:40,560 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:40,560 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:40,560 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2019-09-08 06:12:40,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:40,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:40,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:40,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:12:40,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-08 06:12:40,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:40,863 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:40,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:40,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:40,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:40,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-08 06:12:40,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:41,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:41,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-08 06:12:41,093 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:41,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-08 06:12:41,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:12:41,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:12:41,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:12:41,095 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 17 states. [2019-09-08 06:12:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:41,563 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-09-08 06:12:41,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:12:41,564 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-09-08 06:12:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:41,566 INFO L225 Difference]: With dead ends: 54 [2019-09-08 06:12:41,566 INFO L226 Difference]: Without dead ends: 50 [2019-09-08 06:12:41,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:12:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-08 06:12:41,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2019-09-08 06:12:41,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:12:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-09-08 06:12:41,574 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2019-09-08 06:12:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:41,575 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-09-08 06:12:41,575 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:12:41,575 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-09-08 06:12:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-08 06:12:41,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:41,576 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:41,577 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2019-09-08 06:12:41,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:41,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:41,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:41,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:41,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-08 06:12:41,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:41,862 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:12:41,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:41,902 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:12:41,903 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:41,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-08 06:12:41,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:42,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:42,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-08 06:12:42,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:42,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 19 [2019-09-08 06:12:42,089 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:12:42,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:12:42,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:12:42,090 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 19 states. [2019-09-08 06:12:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:42,676 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2019-09-08 06:12:42,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:12:42,676 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2019-09-08 06:12:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:42,679 INFO L225 Difference]: With dead ends: 60 [2019-09-08 06:12:42,679 INFO L226 Difference]: Without dead ends: 56 [2019-09-08 06:12:42,680 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:12:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-08 06:12:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2019-09-08 06:12:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:12:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-09-08 06:12:42,687 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2019-09-08 06:12:42,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:42,688 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-09-08 06:12:42,688 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:12:42,688 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-09-08 06:12:42,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-08 06:12:42,689 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:42,690 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:42,690 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:42,690 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2019-09-08 06:12:42,690 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:42,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:42,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:42,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:42,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-09-08 06:12:43,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:43,123 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:43,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:12:43,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:12:43,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:43,169 WARN L254 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 64 conjunts are in the unsatisfiable core [2019-09-08 06:12:43,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:43,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:43,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-09-08 06:12:43,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:43,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-08 06:12:43,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:12:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:12:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:12:43,340 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 21 states. [2019-09-08 06:12:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:43,957 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2019-09-08 06:12:43,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:12:43,957 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2019-09-08 06:12:43,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:43,959 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:12:43,959 INFO L226 Difference]: Without dead ends: 62 [2019-09-08 06:12:43,960 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 06:12:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-08 06:12:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2019-09-08 06:12:43,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:12:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-09-08 06:12:43,968 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2019-09-08 06:12:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:43,968 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-09-08 06:12:43,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:12:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-09-08 06:12:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-08 06:12:43,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:43,970 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:43,970 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2019-09-08 06:12:43,971 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:43,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:43,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:43,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-08 06:12:44,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:44,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:44,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:12:44,462 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:12:44,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:44,464 WARN L254 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 72 conjunts are in the unsatisfiable core [2019-09-08 06:12:44,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:45,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:45,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-08 06:12:45,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:45,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2019-09-08 06:12:45,124 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 06:12:45,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 06:12:45,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 06:12:45,129 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 39 states. [2019-09-08 06:12:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:45,998 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2019-09-08 06:12:45,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:12:45,999 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 64 [2019-09-08 06:12:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:46,000 INFO L225 Difference]: With dead ends: 72 [2019-09-08 06:12:46,001 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 06:12:46,002 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 45 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:12:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 06:12:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2019-09-08 06:12:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:12:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-09-08 06:12:46,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2019-09-08 06:12:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:46,009 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-09-08 06:12:46,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 06:12:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-09-08 06:12:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-08 06:12:46,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:46,011 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:46,011 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:46,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:46,012 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2019-09-08 06:12:46,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:46,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:46,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:46,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:46,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-08 06:12:46,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:46,491 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:46,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:12:46,522 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:12:46,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:46,526 WARN L254 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 80 conjunts are in the unsatisfiable core [2019-09-08 06:12:46,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:46,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:46,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-08 06:12:46,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:46,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-08 06:12:46,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 06:12:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 06:12:46,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:12:46,722 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 25 states. [2019-09-08 06:12:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:47,699 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2019-09-08 06:12:47,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:12:47,700 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 71 [2019-09-08 06:12:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:47,701 INFO L225 Difference]: With dead ends: 78 [2019-09-08 06:12:47,702 INFO L226 Difference]: Without dead ends: 74 [2019-09-08 06:12:47,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 06:12:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-08 06:12:47,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2019-09-08 06:12:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:12:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-09-08 06:12:47,723 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2019-09-08 06:12:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:47,723 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-09-08 06:12:47,723 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 06:12:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-09-08 06:12:47,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-08 06:12:47,727 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:47,727 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:47,728 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:47,728 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2019-09-08 06:12:47,728 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:47,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:47,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:47,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:47,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-08 06:12:48,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:48,251 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:48,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:12:48,287 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:12:48,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:48,290 WARN L254 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 88 conjunts are in the unsatisfiable core [2019-09-08 06:12:48,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:49,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:49,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-09-08 06:12:49,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:49,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 47 [2019-09-08 06:12:49,150 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 06:12:49,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 06:12:49,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2048, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 06:12:49,152 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 47 states. [2019-09-08 06:12:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:50,616 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2019-09-08 06:12:50,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:12:50,616 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 78 [2019-09-08 06:12:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:50,617 INFO L225 Difference]: With dead ends: 84 [2019-09-08 06:12:50,617 INFO L226 Difference]: Without dead ends: 80 [2019-09-08 06:12:50,619 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 55 SyntacticMatches, 11 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=214, Invalid=4208, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 06:12:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-08 06:12:50,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2019-09-08 06:12:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:12:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-09-08 06:12:50,626 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2019-09-08 06:12:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:50,626 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-09-08 06:12:50,626 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 06:12:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-09-08 06:12:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 06:12:50,628 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:50,628 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:50,628 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2019-09-08 06:12:50,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:50,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:50,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:50,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:50,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-09-08 06:12:51,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:51,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:51,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:12:51,349 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:12:51,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:51,352 WARN L254 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 96 conjunts are in the unsatisfiable core [2019-09-08 06:12:51,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:51,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:51,450 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-09-08 06:12:51,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:51,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-08 06:12:51,567 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 06:12:51,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 06:12:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:12:51,568 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 29 states. [2019-09-08 06:12:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:52,742 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2019-09-08 06:12:52,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:12:52,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2019-09-08 06:12:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:52,744 INFO L225 Difference]: With dead ends: 90 [2019-09-08 06:12:52,744 INFO L226 Difference]: Without dead ends: 86 [2019-09-08 06:12:52,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 80 SyntacticMatches, 14 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 06:12:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-08 06:12:52,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2019-09-08 06:12:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:12:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-09-08 06:12:52,753 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2019-09-08 06:12:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:52,753 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-09-08 06:12:52,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 06:12:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-09-08 06:12:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-08 06:12:52,755 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:52,755 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:52,755 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2019-09-08 06:12:52,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:52,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:52,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:52,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:52,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-09-08 06:12:53,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:53,468 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:53,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:12:53,528 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:12:53,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:53,532 WARN L254 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-08 06:12:53,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:54,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:54,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-09-08 06:12:54,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:54,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 55 [2019-09-08 06:12:54,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 06:12:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 06:12:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2836, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:12:54,759 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 55 states. [2019-09-08 06:12:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:56,529 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2019-09-08 06:12:56,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-08 06:12:56,530 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 92 [2019-09-08 06:12:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:56,531 INFO L225 Difference]: With dead ends: 96 [2019-09-08 06:12:56,532 INFO L226 Difference]: Without dead ends: 92 [2019-09-08 06:12:56,535 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 65 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=254, Invalid=5908, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 06:12:56,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-08 06:12:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2019-09-08 06:12:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:12:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-09-08 06:12:56,541 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2019-09-08 06:12:56,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:56,541 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-09-08 06:12:56,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 06:12:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-09-08 06:12:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-08 06:12:56,543 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:56,543 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:56,543 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2019-09-08 06:12:56,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:56,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:56,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:56,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:56,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:12:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-09-08 06:12:57,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:12:57,331 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:12:57,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:12:57,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:12:57,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:12:57,385 WARN L254 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-08 06:12:57,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:12:57,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:57,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:12:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-09-08 06:12:57,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:12:57,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-08 06:12:57,699 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-08 06:12:57,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-08 06:12:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-08 06:12:57,700 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 33 states. [2019-09-08 06:12:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:12:59,527 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2019-09-08 06:12:59,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-08 06:12:59,529 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 99 [2019-09-08 06:12:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:12:59,531 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:12:59,531 INFO L226 Difference]: Without dead ends: 98 [2019-09-08 06:12:59,532 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 94 SyntacticMatches, 16 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 06:12:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-08 06:12:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2019-09-08 06:12:59,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:12:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2019-09-08 06:12:59,538 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2019-09-08 06:12:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:12:59,539 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2019-09-08 06:12:59,539 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-08 06:12:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2019-09-08 06:12:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-08 06:12:59,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:12:59,541 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:12:59,541 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:12:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:12:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2019-09-08 06:12:59,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:12:59,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:12:59,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:59,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:12:59,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:12:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-09-08 06:13:00,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:00,302 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:00,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:00,355 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:13:00,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:00,358 WARN L254 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 120 conjunts are in the unsatisfiable core [2019-09-08 06:13:00,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:01,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:01,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-09-08 06:13:01,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:01,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 63 [2019-09-08 06:13:01,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-08 06:13:01,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-08 06:13:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3752, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 06:13:01,801 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 63 states. [2019-09-08 06:13:04,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:04,173 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2019-09-08 06:13:04,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-08 06:13:04,174 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 106 [2019-09-08 06:13:04,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:04,175 INFO L225 Difference]: With dead ends: 108 [2019-09-08 06:13:04,175 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:13:04,180 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 75 SyntacticMatches, 15 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=294, Invalid=7896, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 06:13:04,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:13:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2019-09-08 06:13:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:13:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-09-08 06:13:04,190 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2019-09-08 06:13:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:04,192 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-09-08 06:13:04,192 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-08 06:13:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-09-08 06:13:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-08 06:13:04,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:04,194 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:04,195 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:04,195 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2019-09-08 06:13:04,195 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:04,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:04,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,197 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:04,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-09-08 06:13:05,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:05,141 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:05,151 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:05,186 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 128 conjunts are in the unsatisfiable core [2019-09-08 06:13:05,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:05,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:05,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2019-09-08 06:13:05,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:05,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-08 06:13:05,449 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-08 06:13:05,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-08 06:13:05,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-08 06:13:05,450 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 37 states. [2019-09-08 06:13:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:07,334 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2019-09-08 06:13:07,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-08 06:13:07,334 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2019-09-08 06:13:07,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:07,336 INFO L225 Difference]: With dead ends: 114 [2019-09-08 06:13:07,337 INFO L226 Difference]: Without dead ends: 110 [2019-09-08 06:13:07,339 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 108 SyntacticMatches, 18 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 06:13:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-08 06:13:07,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2019-09-08 06:13:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:13:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-09-08 06:13:07,345 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2019-09-08 06:13:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:07,345 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-09-08 06:13:07,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-08 06:13:07,345 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-09-08 06:13:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-08 06:13:07,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:07,347 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:07,347 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:07,347 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2019-09-08 06:13:07,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:07,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:07,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:07,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:07,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-09-08 06:13:08,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:08,190 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:08,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:08,238 WARN L254 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 136 conjunts are in the unsatisfiable core [2019-09-08 06:13:08,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:09,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:09,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:09,914 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2019-09-08 06:13:09,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:09,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 71 [2019-09-08 06:13:09,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-08 06:13:09,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-08 06:13:09,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4796, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 06:13:09,922 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 71 states. [2019-09-08 06:13:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:12,595 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2019-09-08 06:13:12,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-08 06:13:12,596 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 120 [2019-09-08 06:13:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:12,598 INFO L225 Difference]: With dead ends: 120 [2019-09-08 06:13:12,598 INFO L226 Difference]: Without dead ends: 116 [2019-09-08 06:13:12,601 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 85 SyntacticMatches, 17 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2082 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=334, Invalid=10172, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 06:13:12,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-08 06:13:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2019-09-08 06:13:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:13:12,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-09-08 06:13:12,606 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2019-09-08 06:13:12,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:12,606 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-09-08 06:13:12,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-08 06:13:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-09-08 06:13:12,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-08 06:13:12,607 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:12,608 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:12,608 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:12,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:12,608 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2019-09-08 06:13:12,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:12,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:12,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:12,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-09-08 06:13:13,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:13,971 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:13,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:14,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:14,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:14,022 WARN L254 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 144 conjunts are in the unsatisfiable core [2019-09-08 06:13:14,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:14,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:14,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-09-08 06:13:14,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:14,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-09-08 06:13:14,275 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-08 06:13:14,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-08 06:13:14,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-08 06:13:14,276 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 41 states. [2019-09-08 06:13:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:16,637 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2019-09-08 06:13:16,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-08 06:13:16,638 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 127 [2019-09-08 06:13:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:16,640 INFO L225 Difference]: With dead ends: 126 [2019-09-08 06:13:16,640 INFO L226 Difference]: Without dead ends: 122 [2019-09-08 06:13:16,641 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 122 SyntacticMatches, 20 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 06:13:16,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-09-08 06:13:16,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2019-09-08 06:13:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 06:13:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2019-09-08 06:13:16,651 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2019-09-08 06:13:16,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:16,652 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2019-09-08 06:13:16,652 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-08 06:13:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2019-09-08 06:13:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-08 06:13:16,653 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:16,653 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:16,653 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:16,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:16,653 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2019-09-08 06:13:16,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:16,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:16,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:16,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:16,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-09-08 06:13:17,749 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:17,749 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:17,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:17,807 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:17,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:17,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 116 conjunts are in the unsatisfiable core [2019-09-08 06:13:17,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:17,969 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:17,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2019-09-08 06:13:18,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:18,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-09-08 06:13:18,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-08 06:13:18,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-08 06:13:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 06:13:18,193 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 43 states. [2019-09-08 06:13:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:20,618 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2019-09-08 06:13:20,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-08 06:13:20,618 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2019-09-08 06:13:20,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:20,620 INFO L225 Difference]: With dead ends: 132 [2019-09-08 06:13:20,620 INFO L226 Difference]: Without dead ends: 128 [2019-09-08 06:13:20,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 130 SyntacticMatches, 20 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 06:13:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-09-08 06:13:20,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2019-09-08 06:13:20,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 06:13:20,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-09-08 06:13:20,627 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2019-09-08 06:13:20,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:20,627 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-09-08 06:13:20,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-08 06:13:20,627 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-09-08 06:13:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-08 06:13:20,628 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:20,629 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:20,629 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2019-09-08 06:13:20,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:20,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:20,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:20,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:20,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-08 06:13:21,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:21,892 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:21,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:21,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 06:13:21,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:21,950 WARN L254 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 160 conjunts are in the unsatisfiable core [2019-09-08 06:13:21,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:22,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:22,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-08 06:13:22,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:22,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-09-08 06:13:22,262 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-08 06:13:22,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-08 06:13:22,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-08 06:13:22,262 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 45 states. [2019-09-08 06:13:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:25,033 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2019-09-08 06:13:25,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-08 06:13:25,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 141 [2019-09-08 06:13:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:25,039 INFO L225 Difference]: With dead ends: 138 [2019-09-08 06:13:25,039 INFO L226 Difference]: Without dead ends: 134 [2019-09-08 06:13:25,040 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 136 SyntacticMatches, 22 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 06:13:25,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-08 06:13:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2019-09-08 06:13:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 06:13:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2019-09-08 06:13:25,045 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2019-09-08 06:13:25,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:25,046 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2019-09-08 06:13:25,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-08 06:13:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2019-09-08 06:13:25,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-09-08 06:13:25,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:25,047 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:25,048 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:25,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2019-09-08 06:13:25,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:25,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:25,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:25,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:25,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:26,308 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-09-08 06:13:26,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:26,308 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:26,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:26,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 06:13:26,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:26,378 WARN L254 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 168 conjunts are in the unsatisfiable core [2019-09-08 06:13:26,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:28,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:28,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-09-08 06:13:28,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:28,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 87 [2019-09-08 06:13:28,829 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 06:13:28,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 06:13:28,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=7268, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 06:13:28,829 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 87 states. [2019-09-08 06:13:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:32,499 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2019-09-08 06:13:32,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-08 06:13:32,499 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 148 [2019-09-08 06:13:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:32,501 INFO L225 Difference]: With dead ends: 144 [2019-09-08 06:13:32,501 INFO L226 Difference]: Without dead ends: 140 [2019-09-08 06:13:32,503 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 105 SyntacticMatches, 21 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=414, Invalid=15588, Unknown=0, NotChecked=0, Total=16002 [2019-09-08 06:13:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-08 06:13:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2019-09-08 06:13:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 06:13:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2019-09-08 06:13:32,508 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2019-09-08 06:13:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:32,508 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2019-09-08 06:13:32,508 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 06:13:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2019-09-08 06:13:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-08 06:13:32,509 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:32,510 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:32,510 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:32,510 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2019-09-08 06:13:32,510 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:32,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:32,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:32,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:32,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2019-09-08 06:13:33,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:33,929 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:33,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:33,983 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:33,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:33,986 WARN L254 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 176 conjunts are in the unsatisfiable core [2019-09-08 06:13:33,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:34,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:34,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2019-09-08 06:13:34,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:34,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-09-08 06:13:34,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-08 06:13:34,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-08 06:13:34,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-08 06:13:34,333 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 49 states. [2019-09-08 06:13:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:37,590 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2019-09-08 06:13:37,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-08 06:13:37,592 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 155 [2019-09-08 06:13:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:37,594 INFO L225 Difference]: With dead ends: 150 [2019-09-08 06:13:37,594 INFO L226 Difference]: Without dead ends: 146 [2019-09-08 06:13:37,595 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 150 SyntacticMatches, 24 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 06:13:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-08 06:13:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2019-09-08 06:13:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:13:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2019-09-08 06:13:37,602 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2019-09-08 06:13:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:37,602 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2019-09-08 06:13:37,602 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-08 06:13:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2019-09-08 06:13:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-08 06:13:37,603 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:37,604 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:37,604 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2019-09-08 06:13:37,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:37,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:37,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:37,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:37,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2019-09-08 06:13:39,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:39,065 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:39,077 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:39,125 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:39,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:39,132 WARN L254 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 184 conjunts are in the unsatisfiable core [2019-09-08 06:13:39,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:41,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:41,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2019-09-08 06:13:42,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:42,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 95 [2019-09-08 06:13:42,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 06:13:42,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 06:13:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=8696, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 06:13:42,037 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 95 states. [2019-09-08 06:13:46,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:46,881 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2019-09-08 06:13:46,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-08 06:13:46,881 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 162 [2019-09-08 06:13:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:46,883 INFO L225 Difference]: With dead ends: 156 [2019-09-08 06:13:46,883 INFO L226 Difference]: Without dead ends: 152 [2019-09-08 06:13:46,885 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 115 SyntacticMatches, 23 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=454, Invalid=18728, Unknown=0, NotChecked=0, Total=19182 [2019-09-08 06:13:46,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-09-08 06:13:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-09-08 06:13:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 06:13:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2019-09-08 06:13:46,892 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 162 [2019-09-08 06:13:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:46,892 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2019-09-08 06:13:46,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 06:13:46,893 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2019-09-08 06:13:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-08 06:13:46,894 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:46,894 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:46,894 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:46,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1407042496, now seen corresponding path program 11 times [2019-09-08 06:13:46,895 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:46,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:46,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:46,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:46,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:46,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-09-08 06:13:48,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:48,593 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:48,604 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:48,675 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 06:13:48,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:48,679 WARN L254 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 192 conjunts are in the unsatisfiable core [2019-09-08 06:13:48,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:48,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:48,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2019-09-08 06:13:49,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:49,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2019-09-08 06:13:49,041 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-08 06:13:49,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-08 06:13:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-08 06:13:49,042 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 53 states. [2019-09-08 06:13:52,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:52,962 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2019-09-08 06:13:52,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-08 06:13:52,963 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 169 [2019-09-08 06:13:52,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:52,965 INFO L225 Difference]: With dead ends: 162 [2019-09-08 06:13:52,965 INFO L226 Difference]: Without dead ends: 158 [2019-09-08 06:13:52,967 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 164 SyntacticMatches, 26 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 06:13:52,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-08 06:13:52,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 93. [2019-09-08 06:13:52,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 06:13:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2019-09-08 06:13:52,974 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 169 [2019-09-08 06:13:52,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:52,974 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2019-09-08 06:13:52,974 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-08 06:13:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2019-09-08 06:13:52,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-08 06:13:52,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:52,976 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:52,976 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:52,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash 491557311, now seen corresponding path program 11 times [2019-09-08 06:13:52,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:52,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:52,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:52,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:52,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2019-09-08 06:13:54,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:54,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:54,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:54,848 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 06:13:54,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:54,852 WARN L254 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 200 conjunts are in the unsatisfiable core [2019-09-08 06:13:54,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:57,925 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:57,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:13:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2019-09-08 06:13:58,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:58,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 103 [2019-09-08 06:13:58,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-08 06:13:58,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-08 06:13:58,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=10252, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 06:13:58,161 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 103 states. [2019-09-08 06:14:02,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:02,566 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2019-09-08 06:14:02,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-08 06:14:02,566 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 176 [2019-09-08 06:14:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:02,568 INFO L225 Difference]: With dead ends: 168 [2019-09-08 06:14:02,568 INFO L226 Difference]: Without dead ends: 164 [2019-09-08 06:14:02,570 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 125 SyntacticMatches, 25 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4729 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=494, Invalid=22156, Unknown=0, NotChecked=0, Total=22650 [2019-09-08 06:14:02,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-08 06:14:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 96. [2019-09-08 06:14:02,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-08 06:14:02,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2019-09-08 06:14:02,579 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 176 [2019-09-08 06:14:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:02,580 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2019-09-08 06:14:02,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-08 06:14:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2019-09-08 06:14:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-09-08 06:14:02,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:02,582 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:02,582 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:02,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:02,583 INFO L82 PathProgramCache]: Analyzing trace with hash 308359396, now seen corresponding path program 12 times [2019-09-08 06:14:02,583 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:02,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:02,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:02,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:02,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2019-09-08 06:14:04,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:04,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:04,601 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:14:04,665 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 06:14:04,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:04,669 WARN L254 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 208 conjunts are in the unsatisfiable core [2019-09-08 06:14:04,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:04,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:04,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:05,035 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2019-09-08 06:14:05,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:05,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2019-09-08 06:14:05,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-08 06:14:05,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-08 06:14:05,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-08 06:14:05,041 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 57 states. [2019-09-08 06:14:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:09,487 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2019-09-08 06:14:09,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-08 06:14:09,488 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 183 [2019-09-08 06:14:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:09,490 INFO L225 Difference]: With dead ends: 174 [2019-09-08 06:14:09,491 INFO L226 Difference]: Without dead ends: 170 [2019-09-08 06:14:09,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 178 SyntacticMatches, 28 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1352 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=314, Invalid=11028, Unknown=0, NotChecked=0, Total=11342 [2019-09-08 06:14:09,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-09-08 06:14:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 99. [2019-09-08 06:14:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-08 06:14:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2019-09-08 06:14:09,496 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 183 [2019-09-08 06:14:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:09,497 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2019-09-08 06:14:09,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-08 06:14:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2019-09-08 06:14:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-08 06:14:09,498 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:09,499 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:09,499 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:09,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:09,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1601548961, now seen corresponding path program 12 times [2019-09-08 06:14:09,499 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:09,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:09,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:09,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:09,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-09-08 06:14:11,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:11,282 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:11,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:14:11,371 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 06:14:11,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:11,377 WARN L254 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 216 conjunts are in the unsatisfiable core [2019-09-08 06:14:11,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:15,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:15,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:15,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2019-09-08 06:14:15,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:15,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 111 [2019-09-08 06:14:15,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-09-08 06:14:15,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-09-08 06:14:15,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=11936, Unknown=0, NotChecked=0, Total=12210 [2019-09-08 06:14:15,391 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 111 states. [2019-09-08 06:14:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:21,753 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2019-09-08 06:14:21,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-08 06:14:21,753 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 190 [2019-09-08 06:14:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:21,755 INFO L225 Difference]: With dead ends: 180 [2019-09-08 06:14:21,755 INFO L226 Difference]: Without dead ends: 176 [2019-09-08 06:14:21,757 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 135 SyntacticMatches, 27 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=534, Invalid=25872, Unknown=0, NotChecked=0, Total=26406 [2019-09-08 06:14:21,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-09-08 06:14:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 102. [2019-09-08 06:14:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-08 06:14:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2019-09-08 06:14:21,763 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 190 [2019-09-08 06:14:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:21,763 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2019-09-08 06:14:21,763 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-09-08 06:14:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2019-09-08 06:14:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-09-08 06:14:21,764 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:21,765 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:21,765 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1837932792, now seen corresponding path program 13 times [2019-09-08 06:14:21,766 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:21,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:21,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:21,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2019-09-08 06:14:24,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:24,128 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:24,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:24,209 WARN L254 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 224 conjunts are in the unsatisfiable core [2019-09-08 06:14:24,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:24,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:24,414 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:24,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2019-09-08 06:14:24,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:24,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2019-09-08 06:14:24,635 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-08 06:14:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-08 06:14:24,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 06:14:24,636 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand 61 states. [2019-09-08 06:14:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:29,717 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2019-09-08 06:14:29,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-08 06:14:29,718 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 197 [2019-09-08 06:14:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:29,720 INFO L225 Difference]: With dead ends: 186 [2019-09-08 06:14:29,720 INFO L226 Difference]: Without dead ends: 182 [2019-09-08 06:14:29,722 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 192 SyntacticMatches, 30 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=338, Invalid=12772, Unknown=0, NotChecked=0, Total=13110 [2019-09-08 06:14:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-09-08 06:14:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 105. [2019-09-08 06:14:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-08 06:14:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2019-09-08 06:14:29,727 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 197 [2019-09-08 06:14:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:29,728 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2019-09-08 06:14:29,728 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-08 06:14:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2019-09-08 06:14:29,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-08 06:14:29,729 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:29,729 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:29,730 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:29,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:29,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1277526913, now seen corresponding path program 13 times [2019-09-08 06:14:29,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:29,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:29,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:29,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:29,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-08 06:14:31,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:31,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:31,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:32,045 WARN L254 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 232 conjunts are in the unsatisfiable core [2019-09-08 06:14:32,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:36,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:36,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2019-09-08 06:14:36,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:36,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 119 [2019-09-08 06:14:36,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-09-08 06:14:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-09-08 06:14:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=13748, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 06:14:36,378 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 119 states. [2019-09-08 06:14:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:42,508 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2019-09-08 06:14:42,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-08 06:14:42,508 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 204 [2019-09-08 06:14:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:42,510 INFO L225 Difference]: With dead ends: 192 [2019-09-08 06:14:42,510 INFO L226 Difference]: Without dead ends: 188 [2019-09-08 06:14:42,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 145 SyntacticMatches, 29 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6413 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=574, Invalid=29876, Unknown=0, NotChecked=0, Total=30450 [2019-09-08 06:14:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-09-08 06:14:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 108. [2019-09-08 06:14:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-08 06:14:42,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-09-08 06:14:42,519 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 204 [2019-09-08 06:14:42,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:42,520 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-09-08 06:14:42,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-09-08 06:14:42,520 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-09-08 06:14:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-08 06:14:42,521 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:42,522 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:42,522 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1565902508, now seen corresponding path program 14 times [2019-09-08 06:14:42,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:42,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:42,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:42,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:42,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2019-09-08 06:14:45,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:45,203 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:45,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:14:45,272 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:14:45,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:45,276 WARN L254 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 240 conjunts are in the unsatisfiable core [2019-09-08 06:14:45,281 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:45,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:45,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2019-09-08 06:14:45,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:45,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2019-09-08 06:14:45,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-08 06:14:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-08 06:14:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-08 06:14:45,875 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 65 states. [2019-09-08 06:14:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:51,783 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2019-09-08 06:14:51,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-08 06:14:51,783 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 211 [2019-09-08 06:14:51,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:51,785 INFO L225 Difference]: With dead ends: 198 [2019-09-08 06:14:51,786 INFO L226 Difference]: Without dead ends: 194 [2019-09-08 06:14:51,787 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 206 SyntacticMatches, 32 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=362, Invalid=14644, Unknown=0, NotChecked=0, Total=15006 [2019-09-08 06:14:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-08 06:14:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2019-09-08 06:14:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-08 06:14:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2019-09-08 06:14:51,793 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 211 [2019-09-08 06:14:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:51,793 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2019-09-08 06:14:51,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-08 06:14:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2019-09-08 06:14:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-08 06:14:51,795 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:51,795 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:51,795 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:51,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:51,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1516658463, now seen corresponding path program 14 times [2019-09-08 06:14:51,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:51,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:51,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:51,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:51,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2019-09-08 06:14:54,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:54,227 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:54,239 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:14:54,297 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:14:54,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:14:54,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 188 conjunts are in the unsatisfiable core [2019-09-08 06:14:54,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:54,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:54,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:14:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2019-09-08 06:14:54,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:54,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2019-09-08 06:14:54,730 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-08 06:14:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-08 06:14:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 06:14:54,731 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 67 states. [2019-09-08 06:15:00,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:00,772 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2019-09-08 06:15:00,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 06:15:00,772 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 218 [2019-09-08 06:15:00,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:00,773 INFO L225 Difference]: With dead ends: 204 [2019-09-08 06:15:00,774 INFO L226 Difference]: Without dead ends: 200 [2019-09-08 06:15:00,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 214 SyntacticMatches, 32 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=374, Invalid=15628, Unknown=0, NotChecked=0, Total=16002 [2019-09-08 06:15:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-09-08 06:15:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 114. [2019-09-08 06:15:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-08 06:15:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2019-09-08 06:15:00,781 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 218 [2019-09-08 06:15:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:00,782 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2019-09-08 06:15:00,782 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-08 06:15:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2019-09-08 06:15:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-09-08 06:15:00,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:00,783 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:00,784 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:00,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1728931792, now seen corresponding path program 15 times [2019-09-08 06:15:00,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:00,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:00,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:00,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:00,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2019-09-08 06:15:03,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:03,485 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:03,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:15:03,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:15:03,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:03,581 WARN L254 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 256 conjunts are in the unsatisfiable core [2019-09-08 06:15:03,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:03,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:03,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2019-09-08 06:15:04,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:04,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2019-09-08 06:15:04,013 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-08 06:15:04,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-08 06:15:04,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-08 06:15:04,014 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 69 states. [2019-09-08 06:15:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:10,401 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2019-09-08 06:15:10,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-08 06:15:10,401 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 225 [2019-09-08 06:15:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:10,403 INFO L225 Difference]: With dead ends: 210 [2019-09-08 06:15:10,404 INFO L226 Difference]: Without dead ends: 206 [2019-09-08 06:15:10,405 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 220 SyntacticMatches, 34 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=386, Invalid=16644, Unknown=0, NotChecked=0, Total=17030 [2019-09-08 06:15:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-09-08 06:15:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 117. [2019-09-08 06:15:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-08 06:15:10,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2019-09-08 06:15:10,418 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 225 [2019-09-08 06:15:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:10,418 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2019-09-08 06:15:10,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-08 06:15:10,419 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2019-09-08 06:15:10,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-09-08 06:15:10,420 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:10,420 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:10,421 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:10,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1113639617, now seen corresponding path program 15 times [2019-09-08 06:15:10,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:10,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:10,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:10,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:10,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2019-09-08 06:15:13,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:13,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:13,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:15:13,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:15:13,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:13,650 WARN L254 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 264 conjunts are in the unsatisfiable core [2019-09-08 06:15:13,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:19,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:19,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2019-09-08 06:15:19,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:19,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 135 [2019-09-08 06:15:19,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 135 states [2019-09-08 06:15:19,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2019-09-08 06:15:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=17756, Unknown=0, NotChecked=0, Total=18090 [2019-09-08 06:15:19,304 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 135 states. [2019-09-08 06:15:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:28,412 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2019-09-08 06:15:28,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-08 06:15:28,412 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 232 [2019-09-08 06:15:28,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:28,414 INFO L225 Difference]: With dead ends: 216 [2019-09-08 06:15:28,415 INFO L226 Difference]: Without dead ends: 212 [2019-09-08 06:15:28,418 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 165 SyntacticMatches, 33 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8353 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=654, Invalid=38748, Unknown=0, NotChecked=0, Total=39402 [2019-09-08 06:15:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-08 06:15:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 120. [2019-09-08 06:15:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-09-08 06:15:28,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2019-09-08 06:15:28,424 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 232 [2019-09-08 06:15:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:28,425 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2019-09-08 06:15:28,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 135 states. [2019-09-08 06:15:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2019-09-08 06:15:28,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2019-09-08 06:15:28,426 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:28,426 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:28,427 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:28,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash 44515956, now seen corresponding path program 16 times [2019-09-08 06:15:28,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:28,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:28,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:28,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:28,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-08 06:15:31,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:31,733 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:31,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:15:31,836 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:15:31,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:31,845 WARN L254 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 272 conjunts are in the unsatisfiable core [2019-09-08 06:15:31,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:32,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:32,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-08 06:15:32,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:32,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2019-09-08 06:15:32,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-08 06:15:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-08 06:15:32,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-08 06:15:32,405 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 73 states. [2019-09-08 06:15:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:39,594 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2019-09-08 06:15:39,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-08 06:15:39,594 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 239 [2019-09-08 06:15:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:39,596 INFO L225 Difference]: With dead ends: 222 [2019-09-08 06:15:39,597 INFO L226 Difference]: Without dead ends: 218 [2019-09-08 06:15:39,599 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 234 SyntacticMatches, 36 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=410, Invalid=18772, Unknown=0, NotChecked=0, Total=19182 [2019-09-08 06:15:39,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2019-09-08 06:15:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 123. [2019-09-08 06:15:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-09-08 06:15:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2019-09-08 06:15:39,605 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 239 [2019-09-08 06:15:39,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:39,605 INFO L475 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2019-09-08 06:15:39,605 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-08 06:15:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2019-09-08 06:15:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-08 06:15:39,607 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:39,607 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:39,607 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:39,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash 356400863, now seen corresponding path program 16 times [2019-09-08 06:15:39,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:39,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:39,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:39,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:39,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-09-08 06:15:42,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:42,888 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:42,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:15:42,971 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:15:42,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:42,977 WARN L254 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 280 conjunts are in the unsatisfiable core [2019-09-08 06:15:42,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:15:48,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:48,895 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:15:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1872 backedges. 0 proven. 800 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-09-08 06:15:49,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:15:49,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 143 [2019-09-08 06:15:49,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 143 states [2019-09-08 06:15:49,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2019-09-08 06:15:49,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=19952, Unknown=0, NotChecked=0, Total=20306 [2019-09-08 06:15:49,212 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 143 states. [2019-09-08 06:15:59,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:15:59,361 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2019-09-08 06:15:59,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-08 06:15:59,361 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 246 [2019-09-08 06:15:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:15:59,363 INFO L225 Difference]: With dead ends: 228 [2019-09-08 06:15:59,363 INFO L226 Difference]: Without dead ends: 224 [2019-09-08 06:15:59,365 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 175 SyntacticMatches, 35 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9419 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=694, Invalid=43616, Unknown=0, NotChecked=0, Total=44310 [2019-09-08 06:15:59,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-09-08 06:15:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 126. [2019-09-08 06:15:59,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-08 06:15:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2019-09-08 06:15:59,371 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 246 [2019-09-08 06:15:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:15:59,371 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2019-09-08 06:15:59,371 INFO L476 AbstractCegarLoop]: Interpolant automaton has 143 states. [2019-09-08 06:15:59,372 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2019-09-08 06:15:59,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-08 06:15:59,373 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:15:59,373 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:15:59,373 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:15:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:15:59,374 INFO L82 PathProgramCache]: Analyzing trace with hash -29862248, now seen corresponding path program 17 times [2019-09-08 06:15:59,374 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:15:59,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:15:59,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:59,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:15:59,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:15:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2019-09-08 06:16:02,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:02,829 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:02,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:16:02,934 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 06:16:02,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:02,943 WARN L254 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 288 conjunts are in the unsatisfiable core [2019-09-08 06:16:02,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:03,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:03,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 1139 trivial. 0 not checked. [2019-09-08 06:16:03,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:03,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2019-09-08 06:16:03,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-08 06:16:03,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-08 06:16:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-08 06:16:03,453 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 77 states. [2019-09-08 06:16:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:11,476 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2019-09-08 06:16:11,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-08 06:16:11,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2019-09-08 06:16:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:11,478 INFO L225 Difference]: With dead ends: 234 [2019-09-08 06:16:11,478 INFO L226 Difference]: Without dead ends: 230 [2019-09-08 06:16:11,480 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 248 SyntacticMatches, 38 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2592 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=434, Invalid=21028, Unknown=0, NotChecked=0, Total=21462 [2019-09-08 06:16:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-09-08 06:16:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2019-09-08 06:16:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-08 06:16:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2019-09-08 06:16:11,486 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 253 [2019-09-08 06:16:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:11,487 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2019-09-08 06:16:11,487 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-08 06:16:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2019-09-08 06:16:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-09-08 06:16:11,489 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:11,489 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:11,489 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash 256162815, now seen corresponding path program 17 times [2019-09-08 06:16:11,490 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:11,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:11,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:11,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:11,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2019-09-08 06:16:14,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:14,744 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:14,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:16:14,857 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 06:16:14,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:14,863 WARN L254 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 296 conjunts are in the unsatisfiable core [2019-09-08 06:16:14,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:21,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:21,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 0 proven. 901 refuted. 0 times theorem prover too weak. 1207 trivial. 0 not checked. [2019-09-08 06:16:22,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:22,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 151 [2019-09-08 06:16:22,195 INFO L454 AbstractCegarLoop]: Interpolant automaton has 151 states [2019-09-08 06:16:22,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2019-09-08 06:16:22,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=22276, Unknown=0, NotChecked=0, Total=22650 [2019-09-08 06:16:22,198 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 151 states. [2019-09-08 06:16:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:31,878 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2019-09-08 06:16:31,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-08 06:16:31,878 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 260 [2019-09-08 06:16:31,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:31,880 INFO L225 Difference]: With dead ends: 240 [2019-09-08 06:16:31,880 INFO L226 Difference]: Without dead ends: 236 [2019-09-08 06:16:31,884 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 185 SyntacticMatches, 37 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10549 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=734, Invalid=48772, Unknown=0, NotChecked=0, Total=49506 [2019-09-08 06:16:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-09-08 06:16:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 132. [2019-09-08 06:16:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-08 06:16:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2019-09-08 06:16:31,889 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 260 [2019-09-08 06:16:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:31,890 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2019-09-08 06:16:31,890 INFO L476 AbstractCegarLoop]: Interpolant automaton has 151 states. [2019-09-08 06:16:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2019-09-08 06:16:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-09-08 06:16:31,891 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:31,892 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:31,892 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:31,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1054712892, now seen corresponding path program 18 times [2019-09-08 06:16:31,892 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:31,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:31,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:31,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:31,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2019-09-08 06:16:35,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:35,716 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:35,730 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:16:35,826 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 06:16:35,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:35,831 WARN L254 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 304 conjunts are in the unsatisfiable core [2019-09-08 06:16:35,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:36,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:36,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2019-09-08 06:16:36,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:36,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2019-09-08 06:16:36,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-08 06:16:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-08 06:16:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-08 06:16:36,340 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 81 states. [2019-09-08 06:16:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:45,281 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2019-09-08 06:16:45,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-08 06:16:45,287 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 267 [2019-09-08 06:16:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:45,289 INFO L225 Difference]: With dead ends: 246 [2019-09-08 06:16:45,289 INFO L226 Difference]: Without dead ends: 242 [2019-09-08 06:16:45,291 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 262 SyntacticMatches, 40 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=458, Invalid=23412, Unknown=0, NotChecked=0, Total=23870 [2019-09-08 06:16:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2019-09-08 06:16:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 135. [2019-09-08 06:16:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-08 06:16:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2019-09-08 06:16:45,299 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 267 [2019-09-08 06:16:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:45,299 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2019-09-08 06:16:45,299 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-08 06:16:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2019-09-08 06:16:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-09-08 06:16:45,302 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:45,302 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:45,302 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:45,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1208226657, now seen corresponding path program 18 times [2019-09-08 06:16:45,303 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:45,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:45,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:45,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:45,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:16:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2019-09-08 06:16:49,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:16:49,288 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:16:49,304 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:16:49,408 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 06:16:49,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:16:49,414 WARN L254 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 312 conjunts are in the unsatisfiable core [2019-09-08 06:16:49,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:57,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:57,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:16:57,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2358 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2019-09-08 06:16:57,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:57,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 82] total 159 [2019-09-08 06:16:57,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 159 states [2019-09-08 06:16:57,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2019-09-08 06:16:57,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=24728, Unknown=0, NotChecked=0, Total=25122 [2019-09-08 06:16:57,718 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 159 states. [2019-09-08 06:17:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:10,817 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2019-09-08 06:17:10,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-08 06:17:10,818 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 274 [2019-09-08 06:17:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:10,820 INFO L225 Difference]: With dead ends: 252 [2019-09-08 06:17:10,820 INFO L226 Difference]: Without dead ends: 248 [2019-09-08 06:17:10,824 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 195 SyntacticMatches, 39 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11630 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=774, Invalid=54216, Unknown=0, NotChecked=0, Total=54990 [2019-09-08 06:17:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-09-08 06:17:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 138. [2019-09-08 06:17:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-09-08 06:17:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2019-09-08 06:17:10,831 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 274 [2019-09-08 06:17:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:10,832 INFO L475 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2019-09-08 06:17:10,832 INFO L476 AbstractCegarLoop]: Interpolant automaton has 159 states. [2019-09-08 06:17:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2019-09-08 06:17:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-09-08 06:17:10,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:10,834 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:10,834 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:10,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:10,834 INFO L82 PathProgramCache]: Analyzing trace with hash -591647904, now seen corresponding path program 19 times [2019-09-08 06:17:10,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:10,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:10,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:10,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:17:10,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2019-09-08 06:17:14,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:14,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:14,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:17:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:15,069 WARN L254 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 320 conjunts are in the unsatisfiable core [2019-09-08 06:17:15,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:15,337 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:17:15,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:17:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2489 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 1425 trivial. 0 not checked. [2019-09-08 06:17:15,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:15,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2019-09-08 06:17:15,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-08 06:17:15,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-08 06:17:15,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-08 06:17:15,667 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand 85 states. [2019-09-08 06:17:25,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:25,481 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2019-09-08 06:17:25,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-08 06:17:25,481 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 281 [2019-09-08 06:17:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:25,483 INFO L225 Difference]: With dead ends: 258 [2019-09-08 06:17:25,484 INFO L226 Difference]: Without dead ends: 254 [2019-09-08 06:17:25,486 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 276 SyntacticMatches, 42 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3200 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=482, Invalid=25924, Unknown=0, NotChecked=0, Total=26406 [2019-09-08 06:17:25,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2019-09-08 06:17:25,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 141. [2019-09-08 06:17:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-09-08 06:17:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2019-09-08 06:17:25,492 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 281 [2019-09-08 06:17:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:25,493 INFO L475 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2019-09-08 06:17:25,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-08 06:17:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2019-09-08 06:17:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-09-08 06:17:25,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:25,495 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:25,495 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash -504033089, now seen corresponding path program 19 times [2019-09-08 06:17:25,496 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:25,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:25,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:25,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:17:25,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2019-09-08 06:17:29,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:29,347 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:29,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:17:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:29,443 WARN L254 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 328 conjunts are in the unsatisfiable core [2019-09-08 06:17:29,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:37,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:17:37,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:17:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 1501 trivial. 0 not checked. [2019-09-08 06:17:37,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:37,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 86] total 167 [2019-09-08 06:17:37,835 INFO L454 AbstractCegarLoop]: Interpolant automaton has 167 states [2019-09-08 06:17:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2019-09-08 06:17:37,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=27308, Unknown=0, NotChecked=0, Total=27722 [2019-09-08 06:17:37,837 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 167 states. [2019-09-08 06:17:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:17:51,448 INFO L93 Difference]: Finished difference Result 264 states and 266 transitions. [2019-09-08 06:17:51,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-08 06:17:51,448 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 288 [2019-09-08 06:17:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:17:51,450 INFO L225 Difference]: With dead ends: 264 [2019-09-08 06:17:51,450 INFO L226 Difference]: Without dead ends: 260 [2019-09-08 06:17:51,454 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 205 SyntacticMatches, 41 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12882 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=814, Invalid=59948, Unknown=0, NotChecked=0, Total=60762 [2019-09-08 06:17:51,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-08 06:17:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 144. [2019-09-08 06:17:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-08 06:17:51,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2019-09-08 06:17:51,461 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 288 [2019-09-08 06:17:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:17:51,461 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2019-09-08 06:17:51,461 INFO L476 AbstractCegarLoop]: Interpolant automaton has 167 states. [2019-09-08 06:17:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2019-09-08 06:17:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2019-09-08 06:17:51,463 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:17:51,464 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:17:51,464 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:17:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:17:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1090458620, now seen corresponding path program 20 times [2019-09-08 06:17:51,464 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:17:51,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:17:51,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:51,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:17:51,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:17:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:17:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2019-09-08 06:17:55,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:17:55,854 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:17:55,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:17:55,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:17:55,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:17:55,956 WARN L254 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 336 conjunts are in the unsatisfiable core [2019-09-08 06:17:55,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:17:56,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:17:56,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:17:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2019-09-08 06:17:56,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:17:56,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2019-09-08 06:17:56,694 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-08 06:17:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-08 06:17:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-08 06:17:56,695 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand 89 states. [2019-09-08 06:18:07,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:07,457 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2019-09-08 06:18:07,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-08 06:18:07,458 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2019-09-08 06:18:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:07,460 INFO L225 Difference]: With dead ends: 270 [2019-09-08 06:18:07,460 INFO L226 Difference]: Without dead ends: 266 [2019-09-08 06:18:07,462 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 290 SyntacticMatches, 44 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3528 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=506, Invalid=28564, Unknown=0, NotChecked=0, Total=29070 [2019-09-08 06:18:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-08 06:18:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 147. [2019-09-08 06:18:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-08 06:18:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2019-09-08 06:18:07,467 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 295 [2019-09-08 06:18:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:07,468 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2019-09-08 06:18:07,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-08 06:18:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2019-09-08 06:18:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-09-08 06:18:07,470 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:07,470 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:07,471 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash 235497567, now seen corresponding path program 20 times [2019-09-08 06:18:07,471 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:07,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:07,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:07,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:07,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:07,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2019-09-08 06:18:11,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:11,819 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:11,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:18:11,911 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:18:11,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:11,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 260 conjunts are in the unsatisfiable core [2019-09-08 06:18:11,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:12,147 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:18:12,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:18:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 0 proven. 1240 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2019-09-08 06:18:12,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:12,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2019-09-08 06:18:12,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-08 06:18:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-08 06:18:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 06:18:12,499 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 91 states. [2019-09-08 06:18:23,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:23,230 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2019-09-08 06:18:23,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-08 06:18:23,231 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 302 [2019-09-08 06:18:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:23,232 INFO L225 Difference]: With dead ends: 276 [2019-09-08 06:18:23,232 INFO L226 Difference]: Without dead ends: 272 [2019-09-08 06:18:23,235 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 298 SyntacticMatches, 44 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=518, Invalid=29932, Unknown=0, NotChecked=0, Total=30450 [2019-09-08 06:18:23,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-09-08 06:18:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 150. [2019-09-08 06:18:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-09-08 06:18:23,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2019-09-08 06:18:23,242 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 302 [2019-09-08 06:18:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:23,242 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2019-09-08 06:18:23,242 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-08 06:18:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2019-09-08 06:18:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-09-08 06:18:23,244 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:23,245 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:23,245 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:23,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1209997784, now seen corresponding path program 21 times [2019-09-08 06:18:23,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:23,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:23,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:23,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:23,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2019-09-08 06:18:28,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:28,317 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:28,336 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:28,474 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 06:18:28,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:28,482 WARN L254 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 352 conjunts are in the unsatisfiable core [2019-09-08 06:18:28,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:28,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:18:28,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:18:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2019-09-08 06:18:29,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:29,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2019-09-08 06:18:29,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-08 06:18:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-08 06:18:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-08 06:18:29,158 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 93 states. [2019-09-08 06:18:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:18:41,083 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2019-09-08 06:18:41,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-08 06:18:41,087 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 309 [2019-09-08 06:18:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:18:41,089 INFO L225 Difference]: With dead ends: 282 [2019-09-08 06:18:41,089 INFO L226 Difference]: Without dead ends: 278 [2019-09-08 06:18:41,091 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 304 SyntacticMatches, 46 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3872 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=530, Invalid=31332, Unknown=0, NotChecked=0, Total=31862 [2019-09-08 06:18:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-09-08 06:18:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 153. [2019-09-08 06:18:41,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-08 06:18:41,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2019-09-08 06:18:41,097 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 309 [2019-09-08 06:18:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:18:41,098 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2019-09-08 06:18:41,098 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-08 06:18:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2019-09-08 06:18:41,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-09-08 06:18:41,100 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:18:41,100 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:18:41,101 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:18:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:18:41,101 INFO L82 PathProgramCache]: Analyzing trace with hash -749063297, now seen corresponding path program 21 times [2019-09-08 06:18:41,101 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:18:41,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:18:41,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:41,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:18:41,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:18:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2019-09-08 06:18:45,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:45,940 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:45,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:46,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 06:18:46,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:46,109 WARN L254 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 360 conjunts are in the unsatisfiable core [2019-09-08 06:18:46,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:18:56,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:18:56,417 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:18:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2019-09-08 06:18:56,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:18:56,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 183 [2019-09-08 06:18:56,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 183 states [2019-09-08 06:18:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2019-09-08 06:18:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=32852, Unknown=0, NotChecked=0, Total=33306 [2019-09-08 06:18:56,876 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 183 states. [2019-09-08 06:19:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:14,127 INFO L93 Difference]: Finished difference Result 288 states and 290 transitions. [2019-09-08 06:19:14,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-08 06:19:14,127 INFO L78 Accepts]: Start accepts. Automaton has 183 states. Word has length 316 [2019-09-08 06:19:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:14,129 INFO L225 Difference]: With dead ends: 288 [2019-09-08 06:19:14,129 INFO L226 Difference]: Without dead ends: 284 [2019-09-08 06:19:14,132 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 225 SyntacticMatches, 45 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15709 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=894, Invalid=72276, Unknown=0, NotChecked=0, Total=73170 [2019-09-08 06:19:14,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2019-09-08 06:19:14,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 156. [2019-09-08 06:19:14,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-08 06:19:14,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2019-09-08 06:19:14,137 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 316 [2019-09-08 06:19:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:14,138 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2019-09-08 06:19:14,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 183 states. [2019-09-08 06:19:14,138 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2019-09-08 06:19:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-09-08 06:19:14,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:14,140 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:14,140 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:14,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash 546904524, now seen corresponding path program 22 times [2019-09-08 06:19:14,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:14,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:14,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:14,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:14,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2019-09-08 06:19:19,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:19,252 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:19,264 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:19:19,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:19:19,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:19,360 WARN L254 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 368 conjunts are in the unsatisfiable core [2019-09-08 06:19:19,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:19,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:19:19,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:19:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3344 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1914 trivial. 0 not checked. [2019-09-08 06:19:20,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:20,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2019-09-08 06:19:20,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-08 06:19:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-08 06:19:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-08 06:19:20,030 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 97 states. [2019-09-08 06:19:32,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:19:32,584 INFO L93 Difference]: Finished difference Result 294 states and 296 transitions. [2019-09-08 06:19:32,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-08 06:19:32,584 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 323 [2019-09-08 06:19:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:19:32,586 INFO L225 Difference]: With dead ends: 294 [2019-09-08 06:19:32,586 INFO L226 Difference]: Without dead ends: 290 [2019-09-08 06:19:32,589 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 318 SyntacticMatches, 48 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4232 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=554, Invalid=34228, Unknown=0, NotChecked=0, Total=34782 [2019-09-08 06:19:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-09-08 06:19:32,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 159. [2019-09-08 06:19:32,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-09-08 06:19:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2019-09-08 06:19:32,595 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 323 [2019-09-08 06:19:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:19:32,596 INFO L475 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2019-09-08 06:19:32,596 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-08 06:19:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2019-09-08 06:19:32,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2019-09-08 06:19:32,598 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:19:32,598 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:19:32,599 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:19:32,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:19:32,599 INFO L82 PathProgramCache]: Analyzing trace with hash -951012833, now seen corresponding path program 22 times [2019-09-08 06:19:32,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:19:32,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:19:32,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:32,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:19:32,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:19:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:19:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3498 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2019-09-08 06:19:37,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:19:37,524 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:19:37,536 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:19:37,634 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:19:37,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:19:37,641 WARN L254 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 376 conjunts are in the unsatisfiable core [2019-09-08 06:19:37,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:19:48,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:19:48,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:19:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3498 backedges. 0 proven. 1496 refuted. 0 times theorem prover too weak. 2002 trivial. 0 not checked. [2019-09-08 06:19:48,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:19:48,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 98] total 191 [2019-09-08 06:19:48,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 191 states [2019-09-08 06:19:48,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2019-09-08 06:19:48,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=35816, Unknown=0, NotChecked=0, Total=36290 [2019-09-08 06:19:48,783 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 191 states. [2019-09-08 06:20:04,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:04,723 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2019-09-08 06:20:04,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-08 06:20:04,723 INFO L78 Accepts]: Start accepts. Automaton has 191 states. Word has length 330 [2019-09-08 06:20:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:04,725 INFO L225 Difference]: With dead ends: 300 [2019-09-08 06:20:04,726 INFO L226 Difference]: Without dead ends: 296 [2019-09-08 06:20:04,730 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 235 SyntacticMatches, 47 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17022 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=934, Invalid=78872, Unknown=0, NotChecked=0, Total=79806 [2019-09-08 06:20:04,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2019-09-08 06:20:04,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 162. [2019-09-08 06:20:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-08 06:20:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2019-09-08 06:20:04,738 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 330 [2019-09-08 06:20:04,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:04,739 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2019-09-08 06:20:04,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 191 states. [2019-09-08 06:20:04,739 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2019-09-08 06:20:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-09-08 06:20:04,741 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:04,741 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:04,741 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:04,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:04,742 INFO L82 PathProgramCache]: Analyzing trace with hash -177305872, now seen corresponding path program 23 times [2019-09-08 06:20:04,742 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:04,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:04,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:04,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:04,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3657 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 2093 trivial. 0 not checked. [2019-09-08 06:20:10,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:10,245 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:10,257 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:20:10,401 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 06:20:10,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:10,409 WARN L254 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 384 conjunts are in the unsatisfiable core [2019-09-08 06:20:10,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:10,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:20:10,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:20:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3657 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 2093 trivial. 0 not checked. [2019-09-08 06:20:11,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:11,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2019-09-08 06:20:11,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-08 06:20:11,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-08 06:20:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-08 06:20:11,074 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand 101 states. [2019-09-08 06:20:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:24,868 INFO L93 Difference]: Finished difference Result 306 states and 308 transitions. [2019-09-08 06:20:24,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-08 06:20:24,868 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 337 [2019-09-08 06:20:24,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:24,870 INFO L225 Difference]: With dead ends: 306 [2019-09-08 06:20:24,871 INFO L226 Difference]: Without dead ends: 302 [2019-09-08 06:20:24,873 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 332 SyntacticMatches, 50 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=578, Invalid=37252, Unknown=0, NotChecked=0, Total=37830 [2019-09-08 06:20:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2019-09-08 06:20:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 165. [2019-09-08 06:20:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-09-08 06:20:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2019-09-08 06:20:24,880 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 337 [2019-09-08 06:20:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:24,881 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2019-09-08 06:20:24,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-08 06:20:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2019-09-08 06:20:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-09-08 06:20:24,883 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:24,883 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:24,883 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:24,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:24,884 INFO L82 PathProgramCache]: Analyzing trace with hash -442620865, now seen corresponding path program 23 times [2019-09-08 06:20:24,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:24,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:24,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:24,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:24,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:20:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2019-09-08 06:20:30,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:20:30,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:20:30,298 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:20:30,440 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 06:20:30,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:20:30,449 WARN L254 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 392 conjunts are in the unsatisfiable core [2019-09-08 06:20:30,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:41,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:20:41,910 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:20:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3818 backedges. 0 proven. 1633 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2019-09-08 06:20:42,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:42,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 199 [2019-09-08 06:20:42,390 INFO L454 AbstractCegarLoop]: Interpolant automaton has 199 states [2019-09-08 06:20:42,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2019-09-08 06:20:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=38908, Unknown=0, NotChecked=0, Total=39402 [2019-09-08 06:20:42,392 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 199 states. [2019-09-08 06:20:58,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:58,565 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2019-09-08 06:20:58,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-08 06:20:58,565 INFO L78 Accepts]: Start accepts. Automaton has 199 states. Word has length 344 [2019-09-08 06:20:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:58,567 INFO L225 Difference]: With dead ends: 312 [2019-09-08 06:20:58,567 INFO L226 Difference]: Without dead ends: 308 [2019-09-08 06:20:58,572 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 245 SyntacticMatches, 49 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18673 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=974, Invalid=85756, Unknown=0, NotChecked=0, Total=86730 [2019-09-08 06:20:58,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2019-09-08 06:20:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 168. [2019-09-08 06:20:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2019-09-08 06:20:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2019-09-08 06:20:58,578 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 344 [2019-09-08 06:20:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:58,578 INFO L475 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2019-09-08 06:20:58,578 INFO L476 AbstractCegarLoop]: Interpolant automaton has 199 states. [2019-09-08 06:20:58,579 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2019-09-08 06:20:58,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2019-09-08 06:20:58,581 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:58,581 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:58,581 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1907240340, now seen corresponding path program 24 times [2019-09-08 06:20:58,582 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:58,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:58,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:58,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:58,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 2280 trivial. 0 not checked. [2019-09-08 06:21:04,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:04,586 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:04,597 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:21:04,724 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 06:21:04,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:04,732 WARN L254 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 400 conjunts are in the unsatisfiable core [2019-09-08 06:21:04,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:04,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:21:04,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:21:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3984 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 2280 trivial. 0 not checked. [2019-09-08 06:21:05,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:05,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2019-09-08 06:21:05,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 105 states [2019-09-08 06:21:05,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2019-09-08 06:21:05,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=10711, Unknown=0, NotChecked=0, Total=10920 [2019-09-08 06:21:05,416 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 105 states. [2019-09-08 06:21:20,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:20,178 INFO L93 Difference]: Finished difference Result 318 states and 320 transitions. [2019-09-08 06:21:20,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2019-09-08 06:21:20,178 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 351 [2019-09-08 06:21:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:20,181 INFO L225 Difference]: With dead ends: 318 [2019-09-08 06:21:20,181 INFO L226 Difference]: Without dead ends: 314 [2019-09-08 06:21:20,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 346 SyntacticMatches, 52 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5000 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=602, Invalid=40404, Unknown=0, NotChecked=0, Total=41006 [2019-09-08 06:21:20,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2019-09-08 06:21:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 171. [2019-09-08 06:21:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2019-09-08 06:21:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2019-09-08 06:21:20,190 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 351 [2019-09-08 06:21:20,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:20,191 INFO L475 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2019-09-08 06:21:20,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 105 states. [2019-09-08 06:21:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2019-09-08 06:21:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-09-08 06:21:20,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:20,193 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:20,194 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2017184223, now seen corresponding path program 24 times [2019-09-08 06:21:20,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:20,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:20,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:21:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4152 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2019-09-08 06:21:26,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:21:26,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:21:26,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:21:26,154 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 06:21:26,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:21:26,161 WARN L254 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 408 conjunts are in the unsatisfiable core [2019-09-08 06:21:26,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:21:38,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:21:38,463 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:21:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4152 backedges. 0 proven. 1776 refuted. 0 times theorem prover too weak. 2376 trivial. 0 not checked. [2019-09-08 06:21:38,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:21:38,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 207 [2019-09-08 06:21:38,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 207 states [2019-09-08 06:21:38,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 207 interpolants. [2019-09-08 06:21:38,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=42128, Unknown=0, NotChecked=0, Total=42642 [2019-09-08 06:21:38,960 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 207 states. [2019-09-08 06:21:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:21:59,532 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2019-09-08 06:21:59,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-09-08 06:21:59,533 INFO L78 Accepts]: Start accepts. Automaton has 207 states. Word has length 358 [2019-09-08 06:21:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:21:59,534 INFO L225 Difference]: With dead ends: 324 [2019-09-08 06:21:59,534 INFO L226 Difference]: Without dead ends: 320 [2019-09-08 06:21:59,538 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 255 SyntacticMatches, 51 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20251 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=1014, Invalid=92928, Unknown=0, NotChecked=0, Total=93942 [2019-09-08 06:21:59,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-08 06:21:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 174. [2019-09-08 06:21:59,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-08 06:21:59,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2019-09-08 06:21:59,544 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 358 [2019-09-08 06:21:59,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:21:59,544 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2019-09-08 06:21:59,544 INFO L476 AbstractCegarLoop]: Interpolant automaton has 207 states. [2019-09-08 06:21:59,545 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2019-09-08 06:21:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2019-09-08 06:21:59,547 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:21:59,547 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:21:59,547 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:21:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:21:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash 732761528, now seen corresponding path program 25 times [2019-09-08 06:21:59,548 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:21:59,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:21:59,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:59,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:21:59,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2019-09-08 06:22:06,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:06,105 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:06,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:22:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:06,228 WARN L254 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 416 conjunts are in the unsatisfiable core [2019-09-08 06:22:06,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:06,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:22:06,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:22:07,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4325 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2019-09-08 06:22:07,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:07,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2019-09-08 06:22:07,029 INFO L454 AbstractCegarLoop]: Interpolant automaton has 109 states [2019-09-08 06:22:07,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2019-09-08 06:22:07,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=11555, Unknown=0, NotChecked=0, Total=11772 [2019-09-08 06:22:07,030 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand 109 states. [2019-09-08 06:22:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:22:22,707 INFO L93 Difference]: Finished difference Result 330 states and 332 transitions. [2019-09-08 06:22:22,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2019-09-08 06:22:22,708 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 365 [2019-09-08 06:22:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:22:22,710 INFO L225 Difference]: With dead ends: 330 [2019-09-08 06:22:22,710 INFO L226 Difference]: Without dead ends: 326 [2019-09-08 06:22:22,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 360 SyntacticMatches, 54 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5408 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=626, Invalid=43684, Unknown=0, NotChecked=0, Total=44310 [2019-09-08 06:22:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-09-08 06:22:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 177. [2019-09-08 06:22:22,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-08 06:22:22,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2019-09-08 06:22:22,718 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 365 [2019-09-08 06:22:22,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:22:22,719 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2019-09-08 06:22:22,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 109 states. [2019-09-08 06:22:22,719 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2019-09-08 06:22:22,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-09-08 06:22:22,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:22:22,721 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:22:22,721 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:22:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:22:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2137711359, now seen corresponding path program 25 times [2019-09-08 06:22:22,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:22:22,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:22:22,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:22,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:22:22,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:22:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4500 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 2575 trivial. 0 not checked. [2019-09-08 06:22:28,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:22:28,696 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:22:28,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:22:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:22:28,816 WARN L254 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 424 conjunts are in the unsatisfiable core [2019-09-08 06:22:28,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:22:41,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:22:41,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:22:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4500 backedges. 0 proven. 1925 refuted. 0 times theorem prover too weak. 2575 trivial. 0 not checked. [2019-09-08 06:22:42,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:22:42,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 110] total 215 [2019-09-08 06:22:42,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 215 states [2019-09-08 06:22:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 215 interpolants. [2019-09-08 06:22:42,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=45476, Unknown=0, NotChecked=0, Total=46010 [2019-09-08 06:22:42,380 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 215 states. [2019-09-08 06:23:01,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:01,115 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2019-09-08 06:23:01,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2019-09-08 06:23:01,116 INFO L78 Accepts]: Start accepts. Automaton has 215 states. Word has length 372 [2019-09-08 06:23:01,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:01,118 INFO L225 Difference]: With dead ends: 336 [2019-09-08 06:23:01,118 INFO L226 Difference]: Without dead ends: 332 [2019-09-08 06:23:01,124 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 265 SyntacticMatches, 53 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21738 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=1054, Invalid=100388, Unknown=0, NotChecked=0, Total=101442 [2019-09-08 06:23:01,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2019-09-08 06:23:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 180. [2019-09-08 06:23:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-08 06:23:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2019-09-08 06:23:01,129 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 372 [2019-09-08 06:23:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:01,130 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2019-09-08 06:23:01,130 INFO L476 AbstractCegarLoop]: Interpolant automaton has 215 states. [2019-09-08 06:23:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2019-09-08 06:23:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2019-09-08 06:23:01,132 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:01,133 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:01,133 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:01,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1329060004, now seen corresponding path program 26 times [2019-09-08 06:23:01,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:01,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:01,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:01,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:23:01,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:23:07,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4680 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2019-09-08 06:23:07,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:23:07,887 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:23:07,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:23:08,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:23:08,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:23:08,017 WARN L254 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 432 conjunts are in the unsatisfiable core [2019-09-08 06:23:08,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:08,327 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:23:08,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:23:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4680 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2019-09-08 06:23:08,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:08,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 113 [2019-09-08 06:23:08,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 113 states [2019-09-08 06:23:08,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2019-09-08 06:23:08,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=12431, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 06:23:08,816 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 113 states. [2019-09-08 06:23:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:23:25,958 INFO L93 Difference]: Finished difference Result 342 states and 344 transitions. [2019-09-08 06:23:25,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2019-09-08 06:23:25,959 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 379 [2019-09-08 06:23:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:23:25,962 INFO L225 Difference]: With dead ends: 342 [2019-09-08 06:23:25,962 INFO L226 Difference]: Without dead ends: 338 [2019-09-08 06:23:25,965 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 374 SyntacticMatches, 56 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5832 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=650, Invalid=47092, Unknown=0, NotChecked=0, Total=47742 [2019-09-08 06:23:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2019-09-08 06:23:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 183. [2019-09-08 06:23:25,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-09-08 06:23:25,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2019-09-08 06:23:25,971 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 379 [2019-09-08 06:23:25,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:23:25,971 INFO L475 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2019-09-08 06:23:25,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 113 states. [2019-09-08 06:23:25,971 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2019-09-08 06:23:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2019-09-08 06:23:25,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:23:25,974 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:23:25,975 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:23:25,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:23:25,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1716211809, now seen corresponding path program 26 times [2019-09-08 06:23:25,975 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:23:25,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:23:25,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:25,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:23:25,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:23:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:23:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4862 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2019-09-08 06:23:32,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:23:32,458 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:23:32,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:23:32,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:23:32,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:23:32,597 WARN L254 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 440 conjunts are in the unsatisfiable core [2019-09-08 06:23:32,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:23:46,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:23:46,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:23:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4862 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2019-09-08 06:23:47,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:23:47,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 114] total 223 [2019-09-08 06:23:47,329 INFO L454 AbstractCegarLoop]: Interpolant automaton has 223 states [2019-09-08 06:23:47,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2019-09-08 06:23:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=48952, Unknown=0, NotChecked=0, Total=49506 [2019-09-08 06:23:47,332 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 223 states. [2019-09-08 06:24:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:06,899 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2019-09-08 06:24:06,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2019-09-08 06:24:06,899 INFO L78 Accepts]: Start accepts. Automaton has 223 states. Word has length 386 [2019-09-08 06:24:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:06,900 INFO L225 Difference]: With dead ends: 348 [2019-09-08 06:24:06,901 INFO L226 Difference]: Without dead ends: 344 [2019-09-08 06:24:06,907 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 275 SyntacticMatches, 55 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23438 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=1094, Invalid=108136, Unknown=0, NotChecked=0, Total=109230 [2019-09-08 06:24:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2019-09-08 06:24:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 186. [2019-09-08 06:24:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-09-08 06:24:06,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2019-09-08 06:24:06,912 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 386 [2019-09-08 06:24:06,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:06,913 INFO L475 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2019-09-08 06:24:06,913 INFO L476 AbstractCegarLoop]: Interpolant automaton has 223 states. [2019-09-08 06:24:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2019-09-08 06:24:06,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2019-09-08 06:24:06,915 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:06,915 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:06,915 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1587250560, now seen corresponding path program 27 times [2019-09-08 06:24:06,916 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:06,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:06,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:06,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:24:06,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 2889 trivial. 0 not checked. [2019-09-08 06:24:14,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:14,085 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:14,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:24:14,257 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-08 06:24:14,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:24:14,265 WARN L254 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 448 conjunts are in the unsatisfiable core [2019-09-08 06:24:14,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:14,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:24:14,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:24:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 2889 trivial. 0 not checked. [2019-09-08 06:24:15,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:15,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2019-09-08 06:24:15,124 INFO L454 AbstractCegarLoop]: Interpolant automaton has 117 states [2019-09-08 06:24:15,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2019-09-08 06:24:15,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=13339, Unknown=0, NotChecked=0, Total=13572 [2019-09-08 06:24:15,125 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 117 states. [2019-09-08 06:24:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:24:33,199 INFO L93 Difference]: Finished difference Result 354 states and 356 transitions. [2019-09-08 06:24:33,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-09-08 06:24:33,200 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 393 [2019-09-08 06:24:33,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:24:33,202 INFO L225 Difference]: With dead ends: 354 [2019-09-08 06:24:33,202 INFO L226 Difference]: Without dead ends: 350 [2019-09-08 06:24:33,205 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 388 SyntacticMatches, 58 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6272 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=674, Invalid=50628, Unknown=0, NotChecked=0, Total=51302 [2019-09-08 06:24:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2019-09-08 06:24:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 189. [2019-09-08 06:24:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-08 06:24:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2019-09-08 06:24:33,210 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 393 [2019-09-08 06:24:33,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:24:33,210 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2019-09-08 06:24:33,210 INFO L476 AbstractCegarLoop]: Interpolant automaton has 117 states. [2019-09-08 06:24:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2019-09-08 06:24:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-09-08 06:24:33,213 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:24:33,213 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:24:33,213 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:24:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:24:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1810526143, now seen corresponding path program 27 times [2019-09-08 06:24:33,214 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:24:33,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:24:33,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:33,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:24:33,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:24:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:24:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 2997 trivial. 0 not checked. [2019-09-08 06:24:40,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:24:40,042 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:24:40,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:24:40,216 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-09-08 06:24:40,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:24:40,225 WARN L254 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 456 conjunts are in the unsatisfiable core [2019-09-08 06:24:40,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:24:55,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:24:55,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-08 06:24:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5238 backedges. 0 proven. 2241 refuted. 0 times theorem prover too weak. 2997 trivial. 0 not checked. [2019-09-08 06:24:55,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:24:55,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 118] total 231 [2019-09-08 06:24:55,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 231 states [2019-09-08 06:24:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 231 interpolants. [2019-09-08 06:24:55,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=52556, Unknown=0, NotChecked=0, Total=53130 [2019-09-08 06:24:55,722 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 231 states.