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/array-crafted/mapsum3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:04:48,284 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:04:48,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:04:48,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-07 12:04:48,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:04:48,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:04:48,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:04:48,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:04:48,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:04:48,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:04:48,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:04:48,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:04:48,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:04:48,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:04:48,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:04:48,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:04:48,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 12:04:48,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:04:48,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:04:48,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:04:48,354 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 [2019-09-07 12:04:48,374 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:04:48,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:04:48,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:04:48,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:04:48,378 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:04:48,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:04:48,379 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:04:48,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:04:48,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:04:48,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:04:48,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:04:48,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:04:48,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:04:48,382 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:04:48,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:04:48,382 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:04:48,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:04:48,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:04:48,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:04:48,383 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:04:48,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:04:48,384 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:04:48,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:04:48,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:04:48,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:04:48,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:04:48,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:04:48,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:04:48,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:04:48,421 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:04:48,434 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:04:48,438 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:04:48,439 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:04:48,440 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:04:48,440 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapsum3.i [2019-09-07 12:04:48,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68e156c7/bc1d71677ea04686b7fe784112b1ebe6/FLAGcaa27b58b [2019-09-07 12:04:49,011 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:04:49,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapsum3.i [2019-09-07 12:04:49,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68e156c7/bc1d71677ea04686b7fe784112b1ebe6/FLAGcaa27b58b [2019-09-07 12:04:49,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b68e156c7/bc1d71677ea04686b7fe784112b1ebe6 [2019-09-07 12:04:49,377 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:04:49,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:04:49,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:04:49,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:04:49,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:04:49,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a9b815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49, skipping insertion in model container [2019-09-07 12:04:49,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,396 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:04:49,417 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:04:49,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:04:49,636 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:04:49,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:04:49,671 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:04:49,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49 WrapperNode [2019-09-07 12:04:49,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:04:49,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:04:49,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:04:49,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:04:49,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,803 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (1/1) ... [2019-09-07 12:04:49,806 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:04:49,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:04:49,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:04:49,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:04:49,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (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 [2019-09-07 12:04:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:04:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:04:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2019-09-07 12:04:49,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:04:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:04:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 12:04:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2019-09-07 12:04:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 12:04:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:04:49,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 12:04:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 12:04:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 12:04:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:04:49,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:04:50,186 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:04:50,186 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 12:04:50,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:04:50 BoogieIcfgContainer [2019-09-07 12:04:50,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:04:50,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:04:50,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:04:50,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:04:50,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:04:49" (1/3) ... [2019-09-07 12:04:50,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bc8ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:04:50, skipping insertion in model container [2019-09-07 12:04:50,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:04:49" (2/3) ... [2019-09-07 12:04:50,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bc8ceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:04:50, skipping insertion in model container [2019-09-07 12:04:50,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:04:50" (3/3) ... [2019-09-07 12:04:50,196 INFO L109 eAbstractionObserver]: Analyzing ICFG mapsum3.i [2019-09-07 12:04:50,207 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:04:50,216 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:04:50,238 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:04:50,282 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:04:50,282 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:04:50,282 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:04:50,282 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:04:50,283 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:04:50,283 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:04:50,283 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:04:50,283 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:04:50,283 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:04:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-07 12:04:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 12:04:50,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:50,305 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:50,308 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:50,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-09-07 12:04:50,313 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:50,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:50,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:50,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 12:04:50,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:04:50,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 12:04:50,478 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 12:04:50,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 12:04:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:04:50,493 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-07 12:04:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:50,515 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-07 12:04:50,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 12:04:50,517 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 12:04:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:50,527 INFO L225 Difference]: With dead ends: 54 [2019-09-07 12:04:50,527 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 12:04:50,531 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 12:04:50,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 12:04:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-07 12:04:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 12:04:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 12:04:50,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-07 12:04:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:50,576 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 12:04:50,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 12:04:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 12:04:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 12:04:50,579 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:50,579 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:50,580 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-09-07 12:04:50,581 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:50,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:50,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:50,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 12:04:50,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:04:50,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:04:50,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:04:50,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:04:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:04:50,656 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-07 12:04:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:50,695 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 12:04:50,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:04:50,698 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 12:04:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:50,699 INFO L225 Difference]: With dead ends: 46 [2019-09-07 12:04:50,699 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 12:04:50,700 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:04:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 12:04:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-07 12:04:50,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 12:04:50,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 12:04:50,710 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-07 12:04:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:50,711 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 12:04:50,711 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:04:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 12:04:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 12:04:50,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:50,713 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:50,713 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:50,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-09-07 12:04:50,714 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:50,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:50,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 12:04:50,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:50,803 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:50,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:50,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 12:04:50,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream closed [2019-09-07 12:04:50,929 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:04:50,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 12:04:50,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:04:50,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:04:50,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:04:50,931 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-07 12:04:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:50,954 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-07 12:04:50,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:04:50,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 12:04:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:50,956 INFO L225 Difference]: With dead ends: 46 [2019-09-07 12:04:50,956 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 12:04:50,957 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:04:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 12:04:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 12:04:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 12:04:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 12:04:50,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-07 12:04:50,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:50,964 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 12:04:50,964 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:04:50,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 12:04:50,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 12:04:50,966 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:50,966 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:50,967 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-09-07 12:04:50,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:50,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:50,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:50,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:50,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:04:51,070 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:04:51,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:04:51,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:04:51,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:04:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:04:51,073 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 12:04:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:51,096 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-07 12:04:51,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:04:51,097 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-07 12:04:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:51,098 INFO L225 Difference]: With dead ends: 43 [2019-09-07 12:04:51,099 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 12:04:51,099 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:04:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 12:04:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 12:04:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 12:04:51,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 12:04:51,106 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-07 12:04:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:51,108 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 12:04:51,108 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:04:51,109 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 12:04:51,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 12:04:51,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:51,110 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:51,111 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:51,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:51,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-09-07 12:04:51,111 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:51,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:51,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:51,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:04:51,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:51,239 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) [2019-09-07 12:04:51,258 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 [2019-09-07 12:04:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:51,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:04:51,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:04:51,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:51,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 12:04:51,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:04:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:04:51,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:04:51,343 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-07 12:04:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:51,369 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-07 12:04:51,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:04:51,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-07 12:04:51,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:51,371 INFO L225 Difference]: With dead ends: 52 [2019-09-07 12:04:51,371 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 12:04:51,372 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:04:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 12:04:51,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 12:04:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 12:04:51,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 12:04:51,378 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-07 12:04:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:51,379 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 12:04:51,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:04:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 12:04:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-07 12:04:51,380 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:51,381 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:51,381 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:51,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1311885621, now seen corresponding path program 2 times [2019-09-07 12:04:51,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:51,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:51,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:51,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:04:51,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:51,474 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:51,502 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:04:51,541 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:04:51,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:51,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:04:51,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 12:04:51,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:51,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 12:04:51,569 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:04:51,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:04:51,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:04:51,572 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-09-07 12:04:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:51,620 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-09-07 12:04:51,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 12:04:51,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-09-07 12:04:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:51,625 INFO L225 Difference]: With dead ends: 54 [2019-09-07 12:04:51,625 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 12:04:51,626 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:04:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 12:04:51,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-07 12:04:51,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 12:04:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-07 12:04:51,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 44 [2019-09-07 12:04:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:51,642 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-07 12:04:51,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:04:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-07 12:04:51,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 12:04:51,647 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:51,647 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:51,647 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:51,648 INFO L82 PathProgramCache]: Analyzing trace with hash 525258797, now seen corresponding path program 3 times [2019-09-07 12:04:51,648 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:51,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:51,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:51,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-09-07 12:04:51,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:51,727 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) [2019-09-07 12:04:51,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:51,773 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 12:04:51,774 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:51,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:04:51,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-07 12:04:51,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:51,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-09-07 12:04:51,813 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:04:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:04:51,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:04:51,814 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-09-07 12:04:51,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:51,880 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-09-07 12:04:51,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:04:51,882 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-09-07 12:04:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:51,883 INFO L225 Difference]: With dead ends: 58 [2019-09-07 12:04:51,883 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 12:04:51,884 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:04:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 12:04:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 12:04:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 12:04:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-07 12:04:51,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 46 [2019-09-07 12:04:51,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:51,896 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-07 12:04:51,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:04:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-07 12:04:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 12:04:51,897 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:51,899 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:51,899 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:51,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1887809705, now seen corresponding path program 4 times [2019-09-07 12:04:51,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:51,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:51,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:51,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 12:04:52,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:52,047 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 [2019-09-07 12:04:52,073 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:04:52,117 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:04:52,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:52,119 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:04:52,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:52,149 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 12:04:52,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:52,156 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 12:04:52,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:04:52,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:04:52,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:04:52,158 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-09-07 12:04:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:52,191 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-09-07 12:04:52,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:04:52,195 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-09-07 12:04:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:52,196 INFO L225 Difference]: With dead ends: 64 [2019-09-07 12:04:52,196 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 12:04:52,197 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:04:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 12:04:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-07 12:04:52,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 12:04:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-07 12:04:52,203 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2019-09-07 12:04:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:52,203 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-07 12:04:52,204 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:04:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-07 12:04:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 12:04:52,205 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:52,205 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:52,205 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:52,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:52,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 5 times [2019-09-07 12:04:52,206 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:52,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:52,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:52,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:52,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 12:04:52,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:52,287 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:04:52,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:52,384 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 12:04:52,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:52,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:04:52,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-07 12:04:52,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:52,458 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 12:04:52,459 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:04:52,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:04:52,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:04:52,460 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-09-07 12:04:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:52,544 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-09-07 12:04:52,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:04:52,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-09-07 12:04:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:52,546 INFO L225 Difference]: With dead ends: 68 [2019-09-07 12:04:52,546 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 12:04:52,550 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:04:52,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 12:04:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-09-07 12:04:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 12:04:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-07 12:04:52,564 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-09-07 12:04:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:52,565 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-07 12:04:52,570 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:04:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-07 12:04:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-07 12:04:52,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:52,576 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:52,577 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash 546662663, now seen corresponding path program 6 times [2019-09-07 12:04:52,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:52,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:52,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:52,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:52,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-09-07 12:04:52,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:52,713 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 [2019-09-07 12:04:52,737 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:04:52,816 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 12:04:52,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:52,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:04:52,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:52,873 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-09-07 12:04:52,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:52,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-07 12:04:52,880 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:04:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:04:52,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:04:52,881 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 11 states. [2019-09-07 12:04:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:52,950 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-09-07 12:04:52,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 12:04:52,951 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-09-07 12:04:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:52,952 INFO L225 Difference]: With dead ends: 77 [2019-09-07 12:04:52,952 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 12:04:52,953 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:04:52,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 12:04:52,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 12:04:52,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 12:04:52,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-07 12:04:52,959 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-09-07 12:04:52,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:52,959 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-07 12:04:52,959 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:04:52,960 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-07 12:04:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 12:04:52,961 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:52,961 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:52,961 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:52,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1619660647, now seen corresponding path program 7 times [2019-09-07 12:04:52,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:52,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:52,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:52,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:52,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-07 12:04:53,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:53,056 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 [2019-09-07 12:04:53,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:53,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:04:53,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-07 12:04:53,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:53,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-09-07 12:04:53,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:04:53,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:04:53,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:04:53,242 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-09-07 12:04:53,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:53,318 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2019-09-07 12:04:53,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 12:04:53,318 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-09-07 12:04:53,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:53,319 INFO L225 Difference]: With dead ends: 83 [2019-09-07 12:04:53,319 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 12:04:53,320 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:04:53,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 12:04:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-09-07 12:04:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 12:04:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-07 12:04:53,326 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-09-07 12:04:53,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:53,326 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-07 12:04:53,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:04:53,327 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-07 12:04:53,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 12:04:53,328 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:53,328 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:53,329 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:53,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:53,329 INFO L82 PathProgramCache]: Analyzing trace with hash 964116935, now seen corresponding path program 8 times [2019-09-07 12:04:53,329 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:53,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:53,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:53,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:53,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-09-07 12:04:53,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:53,402 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) [2019-09-07 12:04:53,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:53,463 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:04:53,464 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:53,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:04:53,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-09-07 12:04:53,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:53,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-09-07 12:04:53,556 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 12:04:53,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 12:04:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:04:53,556 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 14 states. [2019-09-07 12:04:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:53,619 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2019-09-07 12:04:53,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:04:53,622 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2019-09-07 12:04:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:53,623 INFO L225 Difference]: With dead ends: 89 [2019-09-07 12:04:53,623 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 12:04:53,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:04:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 12:04:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-09-07 12:04:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 12:04:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-09-07 12:04:53,639 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 76 [2019-09-07 12:04:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:53,639 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-09-07 12:04:53,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 12:04:53,640 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-09-07 12:04:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 12:04:53,640 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:53,641 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:53,641 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:53,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:53,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1800824025, now seen corresponding path program 9 times [2019-09-07 12:04:53,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:53,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:53,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:53,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:53,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-09-07 12:04:53,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:53,755 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) [2019-09-07 12:04:53,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:53,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 12:04:53,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:53,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:04:53,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-07 12:04:53,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:53,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-07 12:04:53,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:04:53,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:04:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:04:53,937 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2019-09-07 12:04:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:54,026 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-09-07 12:04:54,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:04:54,027 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-09-07 12:04:54,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:54,028 INFO L225 Difference]: With dead ends: 94 [2019-09-07 12:04:54,028 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 12:04:54,031 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:04:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 12:04:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-07 12:04:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 12:04:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-07 12:04:54,044 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-09-07 12:04:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:54,045 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-07 12:04:54,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:04:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-07 12:04:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 12:04:54,046 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:54,047 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:54,047 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1091736157, now seen corresponding path program 10 times [2019-09-07 12:04:54,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:54,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:54,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-07 12:04:54,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:54,168 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) [2019-09-07 12:04:54,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:54,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:04:54,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:54,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:04:54,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 128 proven. 25 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-09-07 12:04:54,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:54,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-07 12:04:54,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:04:54,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:04:54,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:04:54,351 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 16 states. [2019-09-07 12:04:54,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:54,421 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-07 12:04:54,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:04:54,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-07 12:04:54,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:54,422 INFO L225 Difference]: With dead ends: 103 [2019-09-07 12:04:54,423 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 12:04:54,424 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:04:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 12:04:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2019-09-07 12:04:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 12:04:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-09-07 12:04:54,432 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2019-09-07 12:04:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:54,432 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-09-07 12:04:54,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:04:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-09-07 12:04:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 12:04:54,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:54,433 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:54,434 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash 959940099, now seen corresponding path program 11 times [2019-09-07 12:04:54,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:54,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:54,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:54,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:54,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-09-07 12:04:54,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:54,528 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 [2019-09-07 12:04:54,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:04:54,936 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 12:04:54,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:54,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:04:54,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:04:55,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:55,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-07 12:04:55,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:04:55,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:04:55,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:04:55,050 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 16 states. [2019-09-07 12:04:55,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:55,126 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-09-07 12:04:55,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:04:55,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2019-09-07 12:04:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:55,127 INFO L225 Difference]: With dead ends: 108 [2019-09-07 12:04:55,128 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 12:04:55,128 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:04:55,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 12:04:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-09-07 12:04:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 12:04:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-09-07 12:04:55,134 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 96 [2019-09-07 12:04:55,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:55,135 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-09-07 12:04:55,135 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:04:55,135 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-09-07 12:04:55,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-07 12:04:55,137 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:55,137 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:55,137 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash 754858879, now seen corresponding path program 12 times [2019-09-07 12:04:55,138 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:55,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:55,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:55,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:55,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-09-07 12:04:55,265 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:55,265 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 [2019-09-07 12:04:55,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:04:55,494 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 12:04:55,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:55,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:04:55,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 232 proven. 49 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Stream closed [2019-09-07 12:04:55,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:55,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-07 12:04:55,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 12:04:55,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 12:04:55,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:04:55,632 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 19 states. [2019-09-07 12:04:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:55,733 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2019-09-07 12:04:55,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 12:04:55,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-09-07 12:04:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:55,734 INFO L225 Difference]: With dead ends: 117 [2019-09-07 12:04:55,734 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 12:04:55,736 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:04:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 12:04:55,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-07 12:04:55,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 12:04:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-07 12:04:55,750 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 104 [2019-09-07 12:04:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:55,750 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-07 12:04:55,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 12:04:55,750 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-07 12:04:55,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 12:04:55,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:55,752 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:55,752 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:55,753 INFO L82 PathProgramCache]: Analyzing trace with hash 878320095, now seen corresponding path program 13 times [2019-09-07 12:04:55,753 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:55,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:55,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:55,754 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:55,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 12:04:55,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:55,870 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 [2019-09-07 12:04:55,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:55,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:04:55,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-09-07 12:04:56,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:56,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-07 12:04:56,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 12:04:56,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 12:04:56,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 12:04:56,097 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-07 12:04:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:56,210 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-09-07 12:04:56,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 12:04:56,210 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2019-09-07 12:04:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:56,211 INFO L225 Difference]: With dead ends: 123 [2019-09-07 12:04:56,212 INFO L226 Difference]: Without dead ends: 77 [2019-09-07 12:04:56,212 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 12:04:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-07 12:04:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-09-07 12:04:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 12:04:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-09-07 12:04:56,218 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 112 [2019-09-07 12:04:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:56,218 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-09-07 12:04:56,219 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 12:04:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-09-07 12:04:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 12:04:56,220 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:56,220 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:56,221 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:56,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1308312639, now seen corresponding path program 14 times [2019-09-07 12:04:56,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:56,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:56,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:56,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-07 12:04:56,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:56,370 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 [2019-09-07 12:04:56,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:04:56,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:04:56,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:56,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:04:56,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:04:56,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:56,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-09-07 12:04:56,631 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 12:04:56,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 12:04:56,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 12:04:56,632 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 22 states. [2019-09-07 12:04:56,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:56,722 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-09-07 12:04:56,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:04:56,723 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-09-07 12:04:56,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:56,724 INFO L225 Difference]: With dead ends: 129 [2019-09-07 12:04:56,724 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 12:04:56,725 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 12:04:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 12:04:56,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-09-07 12:04:56,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 12:04:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-09-07 12:04:56,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 116 [2019-09-07 12:04:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:56,735 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-09-07 12:04:56,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 12:04:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-09-07 12:04:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 12:04:56,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:56,737 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:56,737 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1890019937, now seen corresponding path program 15 times [2019-09-07 12:04:56,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:56,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:56,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:56,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:56,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-07 12:04:56,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:56,879 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) [2019-09-07 12:04:56,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:57,078 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 12:04:57,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:57,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:04:57,086 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-09-07 12:04:57,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:57,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-09-07 12:04:57,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 12:04:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 12:04:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:04:57,248 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 21 states. [2019-09-07 12:04:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:57,358 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2019-09-07 12:04:57,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 12:04:57,359 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2019-09-07 12:04:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:57,360 INFO L225 Difference]: With dead ends: 134 [2019-09-07 12:04:57,361 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 12:04:57,362 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:04:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 12:04:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-07 12:04:57,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 12:04:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-09-07 12:04:57,368 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 120 [2019-09-07 12:04:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:57,368 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-09-07 12:04:57,368 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 12:04:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-09-07 12:04:57,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 12:04:57,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:57,371 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:57,371 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:57,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash -703058917, now seen corresponding path program 16 times [2019-09-07 12:04:57,373 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:57,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:57,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:57,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:57,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 12:04:57,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:57,643 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) [2019-09-07 12:04:57,668 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:57,737 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:04:57,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:57,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:04:57,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 12:04:57,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:57,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 12:04:57,779 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 12:04:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 12:04:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 12:04:57,780 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 15 states. [2019-09-07 12:04:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:57,822 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-09-07 12:04:57,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:04:57,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2019-09-07 12:04:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:57,825 INFO L225 Difference]: With dead ends: 140 [2019-09-07 12:04:57,825 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 12:04:57,826 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 12:04:57,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 12:04:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-09-07 12:04:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-07 12:04:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2019-09-07 12:04:57,834 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 128 [2019-09-07 12:04:57,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:57,834 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2019-09-07 12:04:57,834 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 12:04:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2019-09-07 12:04:57,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 12:04:57,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:57,836 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:57,836 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:57,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:57,836 INFO L82 PathProgramCache]: Analyzing trace with hash 965488765, now seen corresponding path program 17 times [2019-09-07 12:04:57,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:57,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:57,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:57,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:57,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-09-07 12:04:58,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:58,029 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 [2019-09-07 12:04:58,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:04:59,749 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 12:04:59,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:59,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:04:59,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:04:59,928 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:59,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-07 12:04:59,929 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 12:04:59,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 12:04:59,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:04:59,930 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 23 states. [2019-09-07 12:05:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:00,051 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-09-07 12:05:00,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 12:05:00,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2019-09-07 12:05:00,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:00,057 INFO L225 Difference]: With dead ends: 144 [2019-09-07 12:05:00,058 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 12:05:00,058 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:05:00,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 12:05:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-09-07 12:05:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 12:05:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-07 12:05:00,064 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 130 [2019-09-07 12:05:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:00,065 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-07 12:05:00,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 12:05:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-07 12:05:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 12:05:00,068 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:00,068 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:00,069 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:00,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1776408569, now seen corresponding path program 18 times [2019-09-07 12:05:00,069 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:00,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:00,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:00,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:00,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2019-09-07 12:05:00,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:00,308 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 12:05:00,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:05:00,811 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 12:05:00,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:00,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:05:00,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 448 proven. 100 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2019-09-07 12:05:01,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:01,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-09-07 12:05:01,005 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 12:05:01,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 12:05:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 12:05:01,006 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 26 states. [2019-09-07 12:05:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:01,108 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2019-09-07 12:05:01,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 12:05:01,110 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 138 [2019-09-07 12:05:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:01,111 INFO L225 Difference]: With dead ends: 153 [2019-09-07 12:05:01,112 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 12:05:01,112 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 12:05:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 12:05:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-07 12:05:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 12:05:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-09-07 12:05:01,121 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 138 [2019-09-07 12:05:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:01,121 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-09-07 12:05:01,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 12:05:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-09-07 12:05:01,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 12:05:01,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:01,123 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 13, 13, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:01,123 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash -159648167, now seen corresponding path program 19 times [2019-09-07 12:05:01,124 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:01,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:01,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:01,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:01,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2019-09-07 12:05:01,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:01,303 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 [2019-09-07 12:05:01,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:05:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:01,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:05:01,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2019-09-07 12:05:01,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:01,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-09-07 12:05:01,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:05:01,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:05:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:05:01,649 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 28 states. [2019-09-07 12:05:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:01,781 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2019-09-07 12:05:01,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 12:05:01,782 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2019-09-07 12:05:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:01,783 INFO L225 Difference]: With dead ends: 159 [2019-09-07 12:05:01,783 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 12:05:01,784 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:05:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 12:05:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-09-07 12:05:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 12:05:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-09-07 12:05:01,792 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 146 [2019-09-07 12:05:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:01,792 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-09-07 12:05:01,792 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:05:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-09-07 12:05:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 12:05:01,795 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:01,795 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:01,795 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:01,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:01,795 INFO L82 PathProgramCache]: Analyzing trace with hash 920273337, now seen corresponding path program 20 times [2019-09-07 12:05:01,796 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:01,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:01,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:01,797 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:05:01,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:01,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2019-09-07 12:05:02,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:02,025 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 [2019-09-07 12:05:02,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:05:02,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:05:02,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:02,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 12:05:02,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2019-09-07 12:05:02,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:02,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2019-09-07 12:05:02,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 12:05:02,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 12:05:02,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 12:05:02,387 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 30 states. [2019-09-07 12:05:02,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:02,496 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-09-07 12:05:02,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 12:05:02,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 150 [2019-09-07 12:05:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:02,498 INFO L225 Difference]: With dead ends: 165 [2019-09-07 12:05:02,498 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 12:05:02,499 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 12:05:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 12:05:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-09-07 12:05:02,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 12:05:02,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-07 12:05:02,504 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 150 [2019-09-07 12:05:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:02,505 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-07 12:05:02,505 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 12:05:02,505 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-07 12:05:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-07 12:05:02,506 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:02,507 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:02,507 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash 606123033, now seen corresponding path program 21 times [2019-09-07 12:05:02,507 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:02,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:02,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:02,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:02,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 12:05:02,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:02,689 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) [2019-09-07 12:05:02,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:05:03,321 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 12:05:03,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:03,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:05:03,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:03,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 536 proven. 121 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-09-07 12:05:03,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:03,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-09-07 12:05:03,568 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 12:05:03,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 12:05:03,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:05:03,570 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 28 states. [2019-09-07 12:05:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:03,679 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2019-09-07 12:05:03,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 12:05:03,680 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-07 12:05:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:03,681 INFO L225 Difference]: With dead ends: 170 [2019-09-07 12:05:03,681 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 12:05:03,682 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 12:05:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 12:05:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-09-07 12:05:03,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-07 12:05:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-09-07 12:05:03,689 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 154 [2019-09-07 12:05:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:03,689 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-09-07 12:05:03,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 12:05:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-09-07 12:05:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 12:05:03,691 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:03,691 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:03,692 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:03,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1060846741, now seen corresponding path program 22 times [2019-09-07 12:05:03,692 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:03,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:03,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:03,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:03,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2019-09-07 12:05:03,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:03,926 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 [2019-09-07 12:05:03,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:05:04,014 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:05:04,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:04,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 12:05:04,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 632 proven. 144 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (24)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:05:04,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:04,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-07 12:05:04,238 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 12:05:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 12:05:04,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:05:04,239 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 31 states. [2019-09-07 12:05:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:04,484 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2019-09-07 12:05:04,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 12:05:04,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2019-09-07 12:05:04,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:04,486 INFO L225 Difference]: With dead ends: 179 [2019-09-07 12:05:04,486 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 12:05:04,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:05:04,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 12:05:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-09-07 12:05:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-07 12:05:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-09-07 12:05:04,493 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 162 [2019-09-07 12:05:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:04,494 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-09-07 12:05:04,494 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 12:05:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-09-07 12:05:04,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-07 12:05:04,495 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:04,496 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:04,496 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:04,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:04,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1948693259, now seen corresponding path program 23 times [2019-09-07 12:05:04,497 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:04,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:04,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:04,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:04,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:04,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2019-09-07 12:05:04,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:04,797 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 [2019-09-07 12:05:04,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:05:13,210 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-07 12:05:13,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:13,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:05:13,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 732 proven. 169 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (25)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:05:13,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:13,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-09-07 12:05:13,443 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 12:05:13,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 12:05:13,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:05:13,444 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 31 states. [2019-09-07 12:05:13,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:13,570 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2019-09-07 12:05:13,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 12:05:13,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 170 [2019-09-07 12:05:13,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:13,571 INFO L225 Difference]: With dead ends: 184 [2019-09-07 12:05:13,571 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 12:05:13,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 12:05:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 12:05:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-09-07 12:05:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 12:05:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-09-07 12:05:13,578 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 170 [2019-09-07 12:05:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:13,579 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-09-07 12:05:13,579 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 12:05:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-09-07 12:05:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-09-07 12:05:13,580 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:13,580 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 16, 16, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:13,580 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash -3950479, now seen corresponding path program 24 times [2019-09-07 12:05:13,582 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:13,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:13,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:13,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:13,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2019-09-07 12:05:13,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:13,817 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) [2019-09-07 12:05:13,831 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:05:15,216 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-07 12:05:15,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:15,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 12:05:15,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2019-09-07 12:05:15,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:15,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2019-09-07 12:05:15,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 12:05:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 12:05:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 12:05:15,620 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 34 states. [2019-09-07 12:05:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:15,763 INFO L93 Difference]: Finished difference Result 193 states and 205 transitions. [2019-09-07 12:05:15,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 12:05:15,764 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 178 [2019-09-07 12:05:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:15,765 INFO L225 Difference]: With dead ends: 193 [2019-09-07 12:05:15,765 INFO L226 Difference]: Without dead ends: 119 [2019-09-07 12:05:15,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 12:05:15,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-07 12:05:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-09-07 12:05:15,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-07 12:05:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-09-07 12:05:15,772 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 178 [2019-09-07 12:05:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:15,773 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-09-07 12:05:15,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 12:05:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-09-07 12:05:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 12:05:15,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:15,776 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 17, 17, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:15,777 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:15,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:15,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1877930287, now seen corresponding path program 25 times [2019-09-07 12:05:15,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:15,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:15,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:15,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:15,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2419 trivial. 0 not checked. [2019-09-07 12:05:16,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:16,045 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 [2019-09-07 12:05:16,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:05:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:16,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 12:05:16,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:16,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2019-09-07 12:05:16,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:16,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2019-09-07 12:05:16,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 12:05:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 12:05:16,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:05:16,486 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 36 states. [2019-09-07 12:05:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:16,618 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2019-09-07 12:05:16,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:05:16,618 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 186 [2019-09-07 12:05:16,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:16,620 INFO L225 Difference]: With dead ends: 199 [2019-09-07 12:05:16,620 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 12:05:16,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:05:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 12:05:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-09-07 12:05:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 12:05:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-09-07 12:05:16,629 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 186 [2019-09-07 12:05:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:16,629 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-09-07 12:05:16,629 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 12:05:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-09-07 12:05:16,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-07 12:05:16,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:16,631 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:16,631 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1503416881, now seen corresponding path program 26 times [2019-09-07 12:05:16,632 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:16,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:16,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:16,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:05:16,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2454 trivial. 0 not checked. [2019-09-07 12:05:16,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:16,885 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 [2019-09-07 12:05:16,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:05:17,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:05:17,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:17,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:05:17,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2019-09-07 12:05:17,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:17,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2019-09-07 12:05:17,373 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 12:05:17,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 12:05:17,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:05:17,374 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 38 states. [2019-09-07 12:05:17,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:17,520 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2019-09-07 12:05:17,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:05:17,521 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 190 [2019-09-07 12:05:17,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:17,522 INFO L225 Difference]: With dead ends: 205 [2019-09-07 12:05:17,522 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 12:05:17,525 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:05:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 12:05:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-09-07 12:05:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 12:05:17,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2019-09-07 12:05:17,534 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 190 [2019-09-07 12:05:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:17,534 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2019-09-07 12:05:17,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 12:05:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2019-09-07 12:05:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-07 12:05:17,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:17,536 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 19, 19, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:17,536 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:17,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1660502895, now seen corresponding path program 27 times [2019-09-07 12:05:17,537 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:17,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:17,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:17,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:17,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2019-09-07 12:05:17,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:17,849 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) [2019-09-07 12:05:17,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:05:19,821 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 12:05:19,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:19,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 12:05:19,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2019-09-07 12:05:20,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:20,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-09-07 12:05:20,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 12:05:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 12:05:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:05:20,119 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 36 states. [2019-09-07 12:05:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:20,292 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2019-09-07 12:05:20,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:05:20,294 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 194 [2019-09-07 12:05:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:20,295 INFO L225 Difference]: With dead ends: 210 [2019-09-07 12:05:20,296 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 12:05:20,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 12:05:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 12:05:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2019-09-07 12:05:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-07 12:05:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-09-07 12:05:20,302 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 194 [2019-09-07 12:05:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:20,303 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-09-07 12:05:20,303 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 12:05:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-09-07 12:05:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-09-07 12:05:20,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:20,305 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:20,305 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1088878323, now seen corresponding path program 28 times [2019-09-07 12:05:20,306 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:20,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:20,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:20,307 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:20,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:20,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 12:05:20,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:20,692 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) [2019-09-07 12:05:20,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:05:20,805 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:05:20,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:20,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:05:20,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 12:05:20,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:20,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 12:05:20,864 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 12:05:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 12:05:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:05:20,865 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 23 states. [2019-09-07 12:05:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:20,943 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-09-07 12:05:20,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:05:20,944 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 202 [2019-09-07 12:05:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:20,945 INFO L225 Difference]: With dead ends: 216 [2019-09-07 12:05:20,945 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 12:05:20,948 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:05:20,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 12:05:20,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-09-07 12:05:20,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 12:05:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2019-09-07 12:05:20,960 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 202 [2019-09-07 12:05:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:20,960 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2019-09-07 12:05:20,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 12:05:20,960 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2019-09-07 12:05:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-07 12:05:20,964 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:20,965 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:20,965 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1122265839, now seen corresponding path program 29 times [2019-09-07 12:05:20,966 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:20,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:20,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:20,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:20,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:21,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2019-09-07 12:05:21,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:21,289 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 [2019-09-07 12:05:21,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:05:46,993 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-07 12:05:46,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:47,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 12:05:47,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:47,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 1092 proven. 256 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2019-09-07 12:05:47,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:47,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2019-09-07 12:05:47,318 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 12:05:47,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 12:05:47,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:05:47,319 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 38 states. [2019-09-07 12:05:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:47,508 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2019-09-07 12:05:47,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:05:47,509 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 204 [2019-09-07 12:05:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:47,510 INFO L225 Difference]: With dead ends: 220 [2019-09-07 12:05:47,510 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 12:05:47,511 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:05:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 12:05:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-09-07 12:05:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 12:05:47,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2019-09-07 12:05:47,517 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 204 [2019-09-07 12:05:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:47,518 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2019-09-07 12:05:47,518 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 12:05:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2019-09-07 12:05:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-07 12:05:47,520 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:47,521 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:47,521 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:47,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1066125419, now seen corresponding path program 30 times [2019-09-07 12:05:47,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:47,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:47,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:47,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:47,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3079 trivial. 0 not checked. [2019-09-07 12:05:47,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:47,903 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 [2019-09-07 12:05:47,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:05:50,859 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-07 12:05:50,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:50,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:05:50,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 1232 proven. 289 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2019-09-07 12:05:51,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:51,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-09-07 12:05:51,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 12:05:51,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 12:05:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 12:05:51,244 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 41 states. [2019-09-07 12:05:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:51,423 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2019-09-07 12:05:51,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 12:05:51,423 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 212 [2019-09-07 12:05:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:51,424 INFO L225 Difference]: With dead ends: 229 [2019-09-07 12:05:51,425 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 12:05:51,426 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 12:05:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 12:05:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2019-09-07 12:05:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 12:05:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2019-09-07 12:05:51,431 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 212 [2019-09-07 12:05:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:51,431 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2019-09-07 12:05:51,432 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 12:05:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2019-09-07 12:05:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-07 12:05:51,433 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:51,433 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 21, 21, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:51,433 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2057887435, now seen corresponding path program 31 times [2019-09-07 12:05:51,434 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:51,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:51,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:51,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:51,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 12:05:51,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:51,781 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:05:51,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:05:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:51,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:05:51,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3400 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (33)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:05:52,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:52,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2019-09-07 12:05:52,388 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 12:05:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 12:05:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:05:52,389 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 44 states. [2019-09-07 12:05:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:52,575 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2019-09-07 12:05:52,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 12:05:52,575 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 220 [2019-09-07 12:05:52,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:52,576 INFO L225 Difference]: With dead ends: 235 [2019-09-07 12:05:52,577 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 12:05:52,578 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:05:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 12:05:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2019-09-07 12:05:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 12:05:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-09-07 12:05:52,585 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 220 [2019-09-07 12:05:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:52,586 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-09-07 12:05:52,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 12:05:52,586 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-09-07 12:05:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-07 12:05:52,588 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:52,588 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 22, 22, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:52,589 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash -218692821, now seen corresponding path program 32 times [2019-09-07 12:05:52,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:52,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:52,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:52,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:05:52,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:52,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2019-09-07 12:05:52,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:52,947 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 [2019-09-07 12:05:52,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:05:53,071 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:05:53,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:53,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:05:53,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:53,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3439 trivial. 0 not checked. [2019-09-07 12:05:53,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:53,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-09-07 12:05:53,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 12:05:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 12:05:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:05:53,520 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 46 states. [2019-09-07 12:05:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:53,721 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2019-09-07 12:05:53,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-07 12:05:53,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 224 [2019-09-07 12:05:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:53,723 INFO L225 Difference]: With dead ends: 241 [2019-09-07 12:05:53,723 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 12:05:53,724 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:05:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 12:05:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2019-09-07 12:05:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 12:05:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2019-09-07 12:05:53,730 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 224 [2019-09-07 12:05:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:53,731 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2019-09-07 12:05:53,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 12:05:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2019-09-07 12:05:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 12:05:53,732 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:53,732 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 23, 23, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:53,732 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1586515595, now seen corresponding path program 33 times [2019-09-07 12:05:53,733 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:53,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:53,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:53,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:53,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2019-09-07 12:05:54,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:54,092 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) [2019-09-07 12:05:54,106 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:00,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-07 12:06:00,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:00,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:06:00,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 1376 proven. 324 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2019-09-07 12:06:00,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:00,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-09-07 12:06:00,542 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 12:06:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 12:06:00,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 12:06:00,543 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 43 states. [2019-09-07 12:06:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:00,737 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2019-09-07 12:06:00,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 12:06:00,738 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 228 [2019-09-07 12:06:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:00,741 INFO L225 Difference]: With dead ends: 246 [2019-09-07 12:06:00,742 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 12:06:00,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 12:06:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 12:06:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-09-07 12:06:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 12:06:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2019-09-07 12:06:00,749 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 228 [2019-09-07 12:06:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:00,752 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2019-09-07 12:06:00,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 12:06:00,752 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2019-09-07 12:06:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-07 12:06:00,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:00,754 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 23, 23, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:00,754 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:00,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:00,754 INFO L82 PathProgramCache]: Analyzing trace with hash 483101959, now seen corresponding path program 34 times [2019-09-07 12:06:00,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:00,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:00,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:00,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:00,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:01,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [2019-09-07 12:06:01,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:01,233 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 [2019-09-07 12:06:01,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:06:01,409 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:01,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:01,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:06:01,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [2019-09-07 12:06:01,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:01,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 12:06:01,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 12:06:01,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 12:06:01,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:06:01,499 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand 27 states. [2019-09-07 12:06:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:01,601 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2019-09-07 12:06:01,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 12:06:01,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2019-09-07 12:06:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:01,603 INFO L225 Difference]: With dead ends: 252 [2019-09-07 12:06:01,604 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 12:06:01,605 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:06:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 12:06:01,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-09-07 12:06:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-07 12:06:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2019-09-07 12:06:01,611 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 236 [2019-09-07 12:06:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:01,611 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2019-09-07 12:06:01,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 12:06:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2019-09-07 12:06:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-07 12:06:01,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:01,614 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 24, 24, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:01,614 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:01,614 INFO L82 PathProgramCache]: Analyzing trace with hash -640158103, now seen corresponding path program 35 times [2019-09-07 12:06:01,615 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:01,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:01,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:01,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:01,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2019-09-07 12:06:02,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:02,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:02,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:41,097 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-07 12:07:41,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:41,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:07:41,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 1524 proven. 361 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2019-09-07 12:07:41,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:41,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-09-07 12:07:41,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 12:07:41,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 12:07:41,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 12:07:41,584 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 45 states. [2019-09-07 12:07:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:41,767 INFO L93 Difference]: Finished difference Result 256 states and 267 transitions. [2019-09-07 12:07:41,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 12:07:41,768 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 238 [2019-09-07 12:07:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:41,769 INFO L225 Difference]: With dead ends: 256 [2019-09-07 12:07:41,769 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 12:07:41,770 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 12:07:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 12:07:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2019-09-07 12:07:41,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 12:07:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2019-09-07 12:07:41,777 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 238 [2019-09-07 12:07:41,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:41,778 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2019-09-07 12:07:41,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 12:07:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2019-09-07 12:07:41,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-07 12:07:41,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:41,781 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 24, 24, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:41,781 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:41,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1199719909, now seen corresponding path program 36 times [2019-09-07 12:07:41,782 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:41,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:41,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:41,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:41,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4264 trivial. 0 not checked. [2019-09-07 12:07:42,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:42,260 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) [2019-09-07 12:07:42,276 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:47,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2019-09-07 12:07:47,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:47,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 12:07:47,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:47,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 1688 proven. 400 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2019-09-07 12:07:47,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:47,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2019-09-07 12:07:47,627 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-07 12:07:47,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-07 12:07:47,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:07:47,628 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 48 states. [2019-09-07 12:07:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:47,823 INFO L93 Difference]: Finished difference Result 265 states and 277 transitions. [2019-09-07 12:07:47,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-07 12:07:47,825 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 246 [2019-09-07 12:07:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:47,826 INFO L225 Difference]: With dead ends: 265 [2019-09-07 12:07:47,826 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 12:07:47,827 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:07:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 12:07:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-09-07 12:07:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 12:07:47,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2019-09-07 12:07:47,833 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 246 [2019-09-07 12:07:47,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:47,833 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2019-09-07 12:07:47,833 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-07 12:07:47,833 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2019-09-07 12:07:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-07 12:07:47,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:47,835 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 25, 25, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:47,835 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:47,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash 963943493, now seen corresponding path program 37 times [2019-09-07 12:07:47,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:47,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:47,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:47,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:47,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4735 trivial. 0 not checked. [2019-09-07 12:07:48,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:48,244 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) [2019-09-07 12:07:48,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:48,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 12:07:48,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4639 trivial. 0 not checked. [2019-09-07 12:07:48,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:48,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2019-09-07 12:07:48,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-07 12:07:48,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-07 12:07:48,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 12:07:48,895 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand 52 states. [2019-09-07 12:07:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:49,138 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2019-09-07 12:07:49,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-07 12:07:49,139 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 254 [2019-09-07 12:07:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:49,140 INFO L225 Difference]: With dead ends: 271 [2019-09-07 12:07:49,140 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 12:07:49,142 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 12:07:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 12:07:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-09-07 12:07:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-09-07 12:07:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2019-09-07 12:07:49,148 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 254 [2019-09-07 12:07:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:49,148 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2019-09-07 12:07:49,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-07 12:07:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2019-09-07 12:07:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-07 12:07:49,150 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:49,150 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 26, 26, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:49,150 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1383752101, now seen corresponding path program 38 times [2019-09-07 12:07:49,151 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:49,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:49,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:49,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:07:49,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2019-09-07 12:07:49,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:49,589 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) [2019-09-07 12:07:49,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:49,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:07:49,723 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:49,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:07:49,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2019-09-07 12:07:50,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:50,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2019-09-07 12:07:50,335 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 12:07:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 12:07:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:07:50,338 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 54 states. [2019-09-07 12:07:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:50,564 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2019-09-07 12:07:50,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 12:07:50,565 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2019-09-07 12:07:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:50,567 INFO L225 Difference]: With dead ends: 277 [2019-09-07 12:07:50,567 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 12:07:50,569 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:07:50,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 12:07:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2019-09-07 12:07:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-07 12:07:50,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2019-09-07 12:07:50,575 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 258 [2019-09-07 12:07:50,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:50,575 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2019-09-07 12:07:50,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 12:07:50,576 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2019-09-07 12:07:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-09-07 12:07:50,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:50,577 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 27, 27, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:50,578 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1242083835, now seen corresponding path program 39 times [2019-09-07 12:07:50,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:50,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:50,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:50,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:50,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4839 trivial. 0 not checked. [2019-09-07 12:07:51,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:51,027 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) [2019-09-07 12:07:51,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:08:00,732 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 12:08:00,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:08:00,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:08:00,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:08:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 1856 proven. 441 refuted. 0 times theorem prover too weak. 3167 trivial. 0 not checked. [2019-09-07 12:08:01,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:08:01,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2019-09-07 12:08:01,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-07 12:08:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-07 12:08:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 12:08:01,212 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 50 states. [2019-09-07 12:08:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:08:01,434 INFO L93 Difference]: Finished difference Result 282 states and 293 transitions. [2019-09-07 12:08:01,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-07 12:08:01,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 262 [2019-09-07 12:08:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:08:01,436 INFO L225 Difference]: With dead ends: 282 [2019-09-07 12:08:01,436 INFO L226 Difference]: Without dead ends: 175 [2019-09-07 12:08:01,438 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 12:08:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-09-07 12:08:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-09-07 12:08:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-09-07 12:08:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2019-09-07 12:08:01,450 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 262 [2019-09-07 12:08:01,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:08:01,451 INFO L475 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2019-09-07 12:08:01,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-07 12:08:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2019-09-07 12:08:01,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-07 12:08:01,454 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:08:01,454 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 27, 27, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:08:01,454 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:08:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:08:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 952204929, now seen corresponding path program 40 times [2019-09-07 12:08:01,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:08:01,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:08:01,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:01,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:08:01,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:08:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2019-09-07 12:08:01,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:08:01,921 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 [2019-09-07 12:08:01,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:08:02,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:08:02,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:08:02,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:08:02,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:08:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 2032 proven. 484 refuted. 0 times theorem prover too weak. 3392 trivial. 0 not checked. [2019-09-07 12:08:02,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:08:02,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 53 [2019-09-07 12:08:02,556 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:08:02,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:08:02,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:08:02,557 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 53 states. [2019-09-07 12:08:02,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:08:02,832 INFO L93 Difference]: Finished difference Result 291 states and 303 transitions. [2019-09-07 12:08:02,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:08:02,833 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 270 [2019-09-07 12:08:02,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:08:02,834 INFO L225 Difference]: With dead ends: 291 [2019-09-07 12:08:02,835 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 12:08:02,836 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:08:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 12:08:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2019-09-07 12:08:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 12:08:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2019-09-07 12:08:02,842 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 270 [2019-09-07 12:08:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:08:02,842 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2019-09-07 12:08:02,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:08:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2019-09-07 12:08:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-09-07 12:08:02,844 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:08:02,845 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 28, 28, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:08:02,845 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:08:02,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:08:02,845 INFO L82 PathProgramCache]: Analyzing trace with hash -657930527, now seen corresponding path program 41 times [2019-09-07 12:08:02,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:08:02,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:08:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:02,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:08:02,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:02,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:08:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5698 trivial. 0 not checked. [2019-09-07 12:08:03,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:08:03,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 12:08:03,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:10:18,650 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2019-09-07 12:10:18,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:10:18,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:10:18,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:10:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 2212 proven. 529 refuted. 0 times theorem prover too weak. 3633 trivial. 0 not checked. [2019-09-07 12:10:19,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:10:19,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2019-09-07 12:10:19,244 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:10:19,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:10:19,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:10:19,245 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 53 states. [2019-09-07 12:10:19,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:10:19,465 INFO L93 Difference]: Finished difference Result 296 states and 307 transitions. [2019-09-07 12:10:19,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:10:19,465 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 278 [2019-09-07 12:10:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:10:19,467 INFO L225 Difference]: With dead ends: 296 [2019-09-07 12:10:19,467 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 12:10:19,468 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:10:19,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 12:10:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2019-09-07 12:10:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 12:10:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2019-09-07 12:10:19,476 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 278 [2019-09-07 12:10:19,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:10:19,476 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2019-09-07 12:10:19,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:10:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2019-09-07 12:10:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-07 12:10:19,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:10:19,478 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 28, 28, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:10:19,478 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:10:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:10:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 267115101, now seen corresponding path program 42 times [2019-09-07 12:10:19,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:10:19,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:10:19,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:19,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:10:19,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:10:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6072 trivial. 0 not checked. [2019-09-07 12:10:19,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:10:19,976 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 [2019-09-07 12:10:19,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:10:34,860 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-07 12:10:34,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:10:34,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 12:10:34,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:10:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 2408 proven. 576 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2019-09-07 12:10:35,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:10:35,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2019-09-07 12:10:35,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 12:10:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 12:10:35,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:10:35,587 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 56 states. [2019-09-07 12:10:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:10:35,842 INFO L93 Difference]: Finished difference Result 305 states and 317 transitions. [2019-09-07 12:10:35,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-07 12:10:35,842 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 286 [2019-09-07 12:10:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:10:35,845 INFO L225 Difference]: With dead ends: 305 [2019-09-07 12:10:35,845 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 12:10:35,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:10:35,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 12:10:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-09-07 12:10:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-09-07 12:10:35,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-09-07 12:10:35,853 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 286 [2019-09-07 12:10:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:10:35,853 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-09-07 12:10:35,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 12:10:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-09-07 12:10:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-09-07 12:10:35,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:10:35,856 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 29, 29, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:10:35,856 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:10:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:10:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1227450557, now seen corresponding path program 43 times [2019-09-07 12:10:35,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:10:35,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:10:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:35,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:10:35,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:10:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2019-09-07 12:10:36,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:10:36,326 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 [2019-09-07 12:10:36,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:10:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:10:36,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 12:10:36,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:10:37,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6519 trivial. 0 not checked. [2019-09-07 12:10:37,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:10:37,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 60 [2019-09-07 12:10:37,215 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-07 12:10:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-07 12:10:37,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:10:37,216 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 60 states. [2019-09-07 12:10:37,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:10:37,471 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2019-09-07 12:10:37,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-07 12:10:37,472 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 294 [2019-09-07 12:10:37,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:10:37,474 INFO L225 Difference]: With dead ends: 311 [2019-09-07 12:10:37,474 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 12:10:37,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:10:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 12:10:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2019-09-07 12:10:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-07 12:10:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2019-09-07 12:10:37,483 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 294 [2019-09-07 12:10:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:10:37,484 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2019-09-07 12:10:37,484 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-07 12:10:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2019-09-07 12:10:37,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-09-07 12:10:37,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:10:37,486 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 30, 30, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:10:37,486 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:10:37,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:10:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1906956771, now seen corresponding path program 44 times [2019-09-07 12:10:37,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:10:37,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:10:37,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:37,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:10:37,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:10:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6690 trivial. 0 not checked. [2019-09-07 12:10:37,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:10:37,973 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 [2019-09-07 12:10:37,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:10:38,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:10:38,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:10:38,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:10:38,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:10:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6574 trivial. 0 not checked. [2019-09-07 12:10:38,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:10:38,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 62 [2019-09-07 12:10:38,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:10:38,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:10:38,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:10:38,968 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 62 states. [2019-09-07 12:10:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:10:39,255 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-09-07 12:10:39,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:10:39,256 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 298 [2019-09-07 12:10:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:10:39,257 INFO L225 Difference]: With dead ends: 317 [2019-09-07 12:10:39,257 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 12:10:39,258 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:10:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 12:10:39,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-09-07 12:10:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-09-07 12:10:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2019-09-07 12:10:39,264 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 298 [2019-09-07 12:10:39,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:10:39,264 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2019-09-07 12:10:39,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:10:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2019-09-07 12:10:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-09-07 12:10:39,266 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:10:39,267 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 31, 31, 29, 29, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:10:39,267 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:10:39,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:10:39,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2131686787, now seen corresponding path program 45 times [2019-09-07 12:10:39,267 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:10:39,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:10:39,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:39,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:10:39,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:10:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6751 trivial. 0 not checked. [2019-09-07 12:10:39,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:10:39,817 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 [2019-09-07 12:10:39,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:10:58,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 12:10:58,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:10:58,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 61 conjunts are in the unsatisfiable core [2019-09-07 12:10:58,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:10:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 2726 proven. 625 refuted. 0 times theorem prover too weak. 4241 trivial. 0 not checked. [2019-09-07 12:10:59,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:10:59,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2019-09-07 12:10:59,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:10:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:10:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=2839, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:10:59,782 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 62 states. [2019-09-07 12:11:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:11:01,017 INFO L93 Difference]: Finished difference Result 323 states and 335 transitions. [2019-09-07 12:11:01,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:11:01,018 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 302 [2019-09-07 12:11:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:11:01,020 INFO L225 Difference]: With dead ends: 323 [2019-09-07 12:11:01,020 INFO L226 Difference]: Without dead ends: 200 [2019-09-07 12:11:01,022 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2063, Invalid=6679, Unknown=0, NotChecked=0, Total=8742 [2019-09-07 12:11:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-09-07 12:11:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-09-07 12:11:01,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-09-07 12:11:01,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2019-09-07 12:11:01,031 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 302 [2019-09-07 12:11:01,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:11:01,031 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2019-09-07 12:11:01,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:11:01,031 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2019-09-07 12:11:01,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-09-07 12:11:01,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:11:01,034 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 31, 31, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:11:01,034 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:11:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:11:01,034 INFO L82 PathProgramCache]: Analyzing trace with hash 779858679, now seen corresponding path program 46 times [2019-09-07 12:11:01,035 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:11:01,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:11:01,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:11:01,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:11:01,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:11:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:11:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7216 trivial. 0 not checked. [2019-09-07 12:11:01,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:11:01,966 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 [2019-09-07 12:11:01,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:11:02,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:11:02,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:11:02,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:11:02,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:11:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 2816 proven. 676 refuted. 0 times theorem prover too weak. 4685 trivial. 0 not checked. [2019-09-07 12:11:03,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:11:03,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29] total 61 [2019-09-07 12:11:03,477 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 12:11:03,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 12:11:03,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:11:03,480 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 61 states. [2019-09-07 12:11:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:11:03,742 INFO L93 Difference]: Finished difference Result 335 states and 347 transitions. [2019-09-07 12:11:03,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 12:11:03,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 312 [2019-09-07 12:11:03,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:11:03,743 INFO L225 Difference]: With dead ends: 335 [2019-09-07 12:11:03,744 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 12:11:03,744 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:11:03,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 12:11:03,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2019-09-07 12:11:03,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-09-07 12:11:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 207 transitions. [2019-09-07 12:11:03,751 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 207 transitions. Word has length 312 [2019-09-07 12:11:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:11:03,751 INFO L475 AbstractCegarLoop]: Abstraction has 203 states and 207 transitions. [2019-09-07 12:11:03,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 12:11:03,752 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 207 transitions. [2019-09-07 12:11:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-09-07 12:11:03,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:11:03,754 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 32, 32, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:11:03,754 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:11:03,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:11:03,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1353485143, now seen corresponding path program 47 times [2019-09-07 12:11:03,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:11:03,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:11:03,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:11:03,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:11:03,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:11:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:11:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8723 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7699 trivial. 0 not checked. [2019-09-07 12:11:04,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:11:04,592 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 [2019-09-07 12:11:04,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:14:01,817 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2019-09-07 12:14:01,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:14:01,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 12:14:01,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:14:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8723 backedges. 3028 proven. 729 refuted. 0 times theorem prover too weak. 4966 trivial. 0 not checked. [2019-09-07 12:14:02,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:14:02,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30] total 63 [2019-09-07 12:14:02,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 12:14:02,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 12:14:02,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:14:02,637 INFO L87 Difference]: Start difference. First operand 203 states and 207 transitions. Second operand 63 states. [2019-09-07 12:14:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:14:02,921 INFO L93 Difference]: Finished difference Result 341 states and 353 transitions. [2019-09-07 12:14:02,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 12:14:02,921 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 320 [2019-09-07 12:14:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:14:02,923 INFO L225 Difference]: With dead ends: 341 [2019-09-07 12:14:02,923 INFO L226 Difference]: Without dead ends: 209 [2019-09-07 12:14:02,924 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:14:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-07 12:14:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2019-09-07 12:14:02,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-09-07 12:14:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2019-09-07 12:14:02,930 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 320 [2019-09-07 12:14:02,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:14:02,930 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2019-09-07 12:14:02,930 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 12:14:02,930 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2019-09-07 12:14:02,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-09-07 12:14:02,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:14:02,933 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 33, 33, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:14:02,933 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:14:02,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:14:02,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1322310071, now seen corresponding path program 48 times [2019-09-07 12:14:02,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:14:02,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:14:02,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:02,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:14:02,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9289 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 8328 trivial. 0 not checked. [2019-09-07 12:14:03,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:14:03,521 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 [2019-09-07 12:14:03,532 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:14:26,350 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2019-09-07 12:14:26,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:14:26,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 12:14:26,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:14:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9289 backedges. 3256 proven. 784 refuted. 0 times theorem prover too weak. 5249 trivial. 0 not checked. [2019-09-07 12:14:27,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:14:27,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 63 [2019-09-07 12:14:27,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 12:14:27,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 12:14:27,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=2881, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:14:27,154 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 63 states. [2019-09-07 12:14:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:14:27,424 INFO L93 Difference]: Finished difference Result 346 states and 357 transitions. [2019-09-07 12:14:27,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 12:14:27,425 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 328 [2019-09-07 12:14:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:14:27,426 INFO L225 Difference]: With dead ends: 346 [2019-09-07 12:14:27,426 INFO L226 Difference]: Without dead ends: 213 [2019-09-07 12:14:27,427 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1025, Invalid=2881, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:14:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-09-07 12:14:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2019-09-07 12:14:27,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-09-07 12:14:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2019-09-07 12:14:27,434 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 328 [2019-09-07 12:14:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:14:27,434 INFO L475 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2019-09-07 12:14:27,434 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 12:14:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2019-09-07 12:14:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-09-07 12:14:27,436 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:14:27,437 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 33, 33, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:14:27,437 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:14:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:14:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash -22871501, now seen corresponding path program 49 times [2019-09-07 12:14:27,437 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:14:27,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:14:27,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:27,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:14:27,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9871 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:14:28,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:14:28,365 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 [2019-09-07 12:14:28,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:14:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:28,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 12:14:28,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:14:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9871 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:14:28,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:14:28,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-07 12:14:28,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 12:14:28,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 12:14:28,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:14:28,609 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand 37 states. [2019-09-07 12:14:28,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:14:28,738 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2019-09-07 12:14:28,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:14:28,739 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 336 [2019-09-07 12:14:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:14:28,741 INFO L225 Difference]: With dead ends: 352 [2019-09-07 12:14:28,741 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 12:14:28,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:14:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 12:14:28,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-09-07 12:14:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-09-07 12:14:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-09-07 12:14:28,752 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 336 [2019-09-07 12:14:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:14:28,753 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-09-07 12:14:28,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 12:14:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-09-07 12:14:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-09-07 12:14:28,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:14:28,758 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 34, 34, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:14:28,758 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:14:28,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:14:28,759 INFO L82 PathProgramCache]: Analyzing trace with hash 2113524373, now seen corresponding path program 50 times [2019-09-07 12:14:28,759 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:14:28,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:14:28,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:28,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:14:28,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8914 trivial. 0 not checked. [2019-09-07 12:14:29,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:14:29,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 12:14:29,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:14:29,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:14:29,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:14:29,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 12:14:29,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:14:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:14:30,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:14:30,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 70 [2019-09-07 12:14:30,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:14:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:14:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:14:30,783 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 70 states. [2019-09-07 12:14:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:14:31,093 INFO L93 Difference]: Finished difference Result 357 states and 366 transitions. [2019-09-07 12:14:31,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:14:31,093 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 338 [2019-09-07 12:14:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:14:31,094 INFO L225 Difference]: With dead ends: 357 [2019-09-07 12:14:31,094 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 12:14:31,096 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:14:31,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 12:14:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-09-07 12:14:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-09-07 12:14:31,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2019-09-07 12:14:31,103 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 338 [2019-09-07 12:14:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:14:31,103 INFO L475 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2019-09-07 12:14:31,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:14:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2019-09-07 12:14:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-07 12:14:31,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:14:31,106 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 35, 35, 33, 33, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:14:31,106 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:14:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:14:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1804947723, now seen corresponding path program 51 times [2019-09-07 12:14:31,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:14:31,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:14:31,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:31,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:14:31,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8983 trivial. 0 not checked. [2019-09-07 12:14:31,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:14:31,743 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 [2019-09-07 12:14:31,753 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:14:43,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 12:14:43,207 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:14:43,220 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-07 12:14:43,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:14:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 3622 proven. 841 refuted. 0 times theorem prover too weak. 5609 trivial. 0 not checked. [2019-09-07 12:14:44,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:14:44,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2019-09-07 12:14:44,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:14:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:14:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=3627, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:14:44,200 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 70 states. [2019-09-07 12:14:45,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:14:45,902 INFO L93 Difference]: Finished difference Result 363 states and 375 transitions. [2019-09-07 12:14:45,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:14:45,902 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 342 [2019-09-07 12:14:45,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:14:45,904 INFO L225 Difference]: With dead ends: 363 [2019-09-07 12:14:45,905 INFO L226 Difference]: Without dead ends: 224 [2019-09-07 12:14:45,907 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 309 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2607, Invalid=8523, Unknown=0, NotChecked=0, Total=11130 [2019-09-07 12:14:45,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-09-07 12:14:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-09-07 12:14:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-07 12:14:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2019-09-07 12:14:45,914 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 342 [2019-09-07 12:14:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:14:45,915 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2019-09-07 12:14:45,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:14:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2019-09-07 12:14:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-09-07 12:14:45,919 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:14:45,919 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 35, 35, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:14:45,919 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:14:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:14:45,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2072550767, now seen corresponding path program 52 times [2019-09-07 12:14:45,920 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:14:45,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:14:45,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:45,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:14:45,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10745 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9520 trivial. 0 not checked. [2019-09-07 12:14:46,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:14:46,625 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 [2019-09-07 12:14:46,636 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:14:46,799 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:14:46,799 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:14:46,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 12:14:46,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:14:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10745 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9520 trivial. 0 not checked. [2019-09-07 12:14:46,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:14:46,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-07 12:14:46,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 12:14:46,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 12:14:46,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:14:46,890 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand 39 states. [2019-09-07 12:14:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:14:47,044 INFO L93 Difference]: Finished difference Result 372 states and 380 transitions. [2019-09-07 12:14:47,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:14:47,044 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 352 [2019-09-07 12:14:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:14:47,046 INFO L225 Difference]: With dead ends: 372 [2019-09-07 12:14:47,046 INFO L226 Difference]: Without dead ends: 226 [2019-09-07 12:14:47,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:14:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-09-07 12:14:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2019-09-07 12:14:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2019-09-07 12:14:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 229 transitions. [2019-09-07 12:14:47,053 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 229 transitions. Word has length 352 [2019-09-07 12:14:47,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:14:47,054 INFO L475 AbstractCegarLoop]: Abstraction has 225 states and 229 transitions. [2019-09-07 12:14:47,054 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 12:14:47,054 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 229 transitions. [2019-09-07 12:14:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2019-09-07 12:14:47,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:14:47,056 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 36, 36, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:14:47,057 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:14:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:14:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1950771665, now seen corresponding path program 53 times [2019-09-07 12:14:47,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:14:47,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:14:47,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:47,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:14:47,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:14:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:14:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 9520 trivial. 0 not checked. [2019-09-07 12:14:47,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:14:47,832 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 [2019-09-07 12:14:47,865 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:18:44,917 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2019-09-07 12:18:44,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:18:44,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:18:44,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:18:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3724 proven. 900 refuted. 0 times theorem prover too weak. 6192 trivial. 0 not checked. [2019-09-07 12:18:45,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:18:45,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 33] total 70 [2019-09-07 12:18:45,907 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:18:45,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:18:45,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1268, Invalid=3562, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:18:45,908 INFO L87 Difference]: Start difference. First operand 225 states and 229 transitions. Second operand 70 states. [2019-09-07 12:18:46,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:18:46,219 INFO L93 Difference]: Finished difference Result 377 states and 389 transitions. [2019-09-07 12:18:46,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:18:46,221 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 354 [2019-09-07 12:18:46,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:18:46,222 INFO L225 Difference]: With dead ends: 377 [2019-09-07 12:18:46,222 INFO L226 Difference]: Without dead ends: 231 [2019-09-07 12:18:46,223 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1268, Invalid=3562, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:18:46,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2019-09-07 12:18:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 229. [2019-09-07 12:18:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-09-07 12:18:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 233 transitions. [2019-09-07 12:18:46,230 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 233 transitions. Word has length 354 [2019-09-07 12:18:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:18:46,231 INFO L475 AbstractCegarLoop]: Abstraction has 229 states and 233 transitions. [2019-09-07 12:18:46,231 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:18:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 233 transitions. [2019-09-07 12:18:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-09-07 12:18:46,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:18:46,233 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 37, 37, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:18:46,234 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:18:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:18:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1479083983, now seen corresponding path program 54 times [2019-09-07 12:18:46,234 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:18:46,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:18:46,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:18:46,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:18:46,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:18:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:18:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11444 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 10219 trivial. 0 not checked. [2019-09-07 12:18:46,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:18:46,915 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:18:46,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE