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-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:29:13,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:29:13,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:29:13,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:29:13,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:29:13,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:29:13,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:29:13,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:29:13,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:29:13,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:29:13,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:29:13,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:29:13,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:29:13,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:29:13,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:29:13,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:29:13,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:29:13,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:29:13,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:29:13,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:29:13,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:29:13,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:29:13,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:29:13,480 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:29:13,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:29:13,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:29:13,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:29:13,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:29:13,495 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 09:29:13,509 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:29:13,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:29:13,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:29:13,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:29:13,511 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:29:13,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:29:13,511 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:29:13,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:29:13,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:29:13,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:29:13,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:29:13,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:29:13,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:29:13,513 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:29:13,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:29:13,513 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:29:13,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:29:13,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:29:13,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:29:13,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:29:13,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:29:13,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:29:13,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:29:13,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:29:13,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:29:13,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:29:13,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:29:13,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:29:13,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:29:13,546 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:29:13,564 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:29:13,569 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:29:13,570 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:29:13,571 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:29:13,572 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-09-07 09:29:13,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a91e0a4b/718d0d02d0aa4ff785a868b5511803f0/FLAG9ce0b5b7e [2019-09-07 09:29:14,157 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:29:14,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-09-07 09:29:14,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a91e0a4b/718d0d02d0aa4ff785a868b5511803f0/FLAG9ce0b5b7e [2019-09-07 09:29:14,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a91e0a4b/718d0d02d0aa4ff785a868b5511803f0 [2019-09-07 09:29:14,553 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:29:14,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:29:14,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:29:14,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:29:14,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:29:14,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d452d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14, skipping insertion in model container [2019-09-07 09:29:14,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,571 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:29:14,588 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:29:14,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:29:14,774 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:29:14,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:29:14,815 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:29:14,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14 WrapperNode [2019-09-07 09:29:14,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:29:14,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:29:14,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:29:14,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:29:14,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (1/1) ... [2019-09-07 09:29:14,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:29:14,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:29:14,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:29:14,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:29:14,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (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 09:29:15,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:29:15,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:29:15,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:29:15,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:29:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:29:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:29:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:29:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:29:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:29:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:29:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:29:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:29:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:29:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:29:15,341 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:29:15,341 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-07 09:29:15,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:29:15 BoogieIcfgContainer [2019-09-07 09:29:15,343 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:29:15,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:29:15,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:29:15,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:29:15,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:29:14" (1/3) ... [2019-09-07 09:29:15,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a994e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:29:15, skipping insertion in model container [2019-09-07 09:29:15,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:29:14" (2/3) ... [2019-09-07 09:29:15,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a994e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:29:15, skipping insertion in model container [2019-09-07 09:29:15,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:29:15" (3/3) ... [2019-09-07 09:29:15,350 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2019-09-07 09:29:15,359 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:29:15,366 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:29:15,384 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:29:15,419 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:29:15,419 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:29:15,420 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:29:15,420 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:29:15,420 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:29:15,420 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:29:15,420 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:29:15,420 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:29:15,420 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:29:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-07 09:29:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 09:29:15,441 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:15,441 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:15,443 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:15,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1992705634, now seen corresponding path program 1 times [2019-09-07 09:29:15,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:15,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:15,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:15,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:15,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:29:15,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:15,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:29:15,607 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:29:15,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:29:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:29:15,624 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-09-07 09:29:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:15,653 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2019-09-07 09:29:15,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:29:15,654 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-07 09:29:15,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:15,665 INFO L225 Difference]: With dead ends: 58 [2019-09-07 09:29:15,665 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 09:29:15,669 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 09:29:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 09:29:15,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-07 09:29:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 09:29:15,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-09-07 09:29:15,718 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 15 [2019-09-07 09:29:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:15,719 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-09-07 09:29:15,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:29:15,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-09-07 09:29:15,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-07 09:29:15,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:15,723 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:15,724 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:15,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2038513977, now seen corresponding path program 1 times [2019-09-07 09:29:15,726 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:15,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:15,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:15,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:15,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:29:15,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:15,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:29:15,846 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:29:15,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:29:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:15,848 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-09-07 09:29:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:15,886 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-09-07 09:29:15,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:29:15,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-07 09:29:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:15,889 INFO L225 Difference]: With dead ends: 50 [2019-09-07 09:29:15,889 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 09:29:15,891 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 09:29:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 09:29:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 09:29:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 09:29:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-09-07 09:29:15,900 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2019-09-07 09:29:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:15,901 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-09-07 09:29:15,906 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:29:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-09-07 09:29:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 09:29:15,907 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:15,908 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:15,908 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:15,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1204074085, now seen corresponding path program 1 times [2019-09-07 09:29:15,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:15,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:15,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:15,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:15,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:15,992 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:15,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:29:15,993 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:29:15,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:29:15,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:15,994 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 3 states. [2019-09-07 09:29:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:16,026 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-09-07 09:29:16,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:29:16,027 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-09-07 09:29:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:16,029 INFO L225 Difference]: With dead ends: 49 [2019-09-07 09:29:16,029 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 09:29:16,030 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 09:29:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 09:29:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-07 09:29:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 09:29:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-09-07 09:29:16,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2019-09-07 09:29:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:16,038 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-09-07 09:29:16,038 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:29:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-09-07 09:29:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 09:29:16,039 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:16,039 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:16,039 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash -489632055, now seen corresponding path program 1 times [2019-09-07 09:29:16,040 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:16,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:16,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:16,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:16,135 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:29:16,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:29:16,138 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:29:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:29:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:29:16,138 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2019-09-07 09:29:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:16,162 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-09-07 09:29:16,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:29:16,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-09-07 09:29:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:16,165 INFO L225 Difference]: With dead ends: 55 [2019-09-07 09:29:16,165 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 09:29:16,166 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 09:29:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 09:29:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-09-07 09:29:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-07 09:29:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-09-07 09:29:16,182 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-09-07 09:29:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:16,183 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-09-07 09:29:16,183 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:29:16,183 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-09-07 09:29:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-07 09:29:16,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:16,186 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:16,186 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -882659065, now seen corresponding path program 1 times [2019-09-07 09:29:16,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:16,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:16,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:16,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:16,269 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 09:29:16,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:16,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:29:16,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:16,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:16,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:29:16,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:29:16,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:29:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:29:16,379 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 5 states. [2019-09-07 09:29:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:16,412 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2019-09-07 09:29:16,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:29:16,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-07 09:29:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:16,414 INFO L225 Difference]: With dead ends: 64 [2019-09-07 09:29:16,414 INFO L226 Difference]: Without dead ends: 38 [2019-09-07 09:29:16,415 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 09:29:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-07 09:29:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-09-07 09:29:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 09:29:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-09-07 09:29:16,422 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 20 [2019-09-07 09:29:16,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:16,422 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-09-07 09:29:16,422 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:29:16,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-09-07 09:29:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-07 09:29:16,424 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:16,424 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:16,424 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:16,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1747071959, now seen corresponding path program 2 times [2019-09-07 09:29:16,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:16,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:16,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:16,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:16,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-07 09:29:16,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:16,495 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:16,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:29:16,548 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:16,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:16,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:29:16,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:29:16,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:16,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-07 09:29:16,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:29:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:29:16,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:16,597 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 7 states. [2019-09-07 09:29:16,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:16,686 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2019-09-07 09:29:16,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:29:16,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-09-07 09:29:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:16,688 INFO L225 Difference]: With dead ends: 75 [2019-09-07 09:29:16,688 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 09:29:16,689 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:29:16,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 09:29:16,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2019-09-07 09:29:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 09:29:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-07 09:29:16,696 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 22 [2019-09-07 09:29:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:16,696 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-07 09:29:16,696 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:29:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-07 09:29:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:29:16,698 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:16,698 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:16,698 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:16,699 INFO L82 PathProgramCache]: Analyzing trace with hash 523443937, now seen corresponding path program 3 times [2019-09-07 09:29:16,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:16,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:16,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:16,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:29:16,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:16,790 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 09:29:16,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:29:16,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:29:16,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:16,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:29:16,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-07 09:29:16,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:16,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 09:29:16,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 09:29:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 09:29:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 09:29:16,874 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-09-07 09:29:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:16,921 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2019-09-07 09:29:16,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 09:29:16,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-07 09:29:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:16,923 INFO L225 Difference]: With dead ends: 73 [2019-09-07 09:29:16,923 INFO L226 Difference]: Without dead ends: 54 [2019-09-07 09:29:16,924 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 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 09:29:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-07 09:29:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2019-09-07 09:29:16,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-07 09:29:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-09-07 09:29:16,930 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 27 [2019-09-07 09:29:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:16,931 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-09-07 09:29:16,931 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 09:29:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-09-07 09:29:16,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-07 09:29:16,932 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:16,932 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:16,932 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:16,933 INFO L82 PathProgramCache]: Analyzing trace with hash -994793717, now seen corresponding path program 4 times [2019-09-07 09:29:16,933 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:16,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:16,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:16,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:17,026 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:29:17,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:17,027 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:29:17,045 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:17,079 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:29:17,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:17,081 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:29:17,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 09:29:17,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:17,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:29:17,099 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:29:17,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:29:17,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:17,100 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 7 states. [2019-09-07 09:29:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:17,131 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2019-09-07 09:29:17,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:29:17,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-09-07 09:29:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:17,133 INFO L225 Difference]: With dead ends: 90 [2019-09-07 09:29:17,133 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 09:29:17,134 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 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 09:29:17,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 09:29:17,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-09-07 09:29:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:29:17,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2019-09-07 09:29:17,142 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 30 [2019-09-07 09:29:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:17,142 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2019-09-07 09:29:17,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:29:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2019-09-07 09:29:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 09:29:17,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:17,144 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:17,144 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:17,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1511473235, now seen corresponding path program 5 times [2019-09-07 09:29:17,145 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:17,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:17,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:17,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:17,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:29:17,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:17,222 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 09:29:17,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:29:17,385 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:29:17,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:17,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:29:17,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-07 09:29:17,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:17,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:29:17,411 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:29:17,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:29:17,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:29:17,412 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 7 states. [2019-09-07 09:29:17,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:17,451 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2019-09-07 09:29:17,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:29:17,453 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-09-07 09:29:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:17,454 INFO L225 Difference]: With dead ends: 81 [2019-09-07 09:29:17,455 INFO L226 Difference]: Without dead ends: 62 [2019-09-07 09:29:17,456 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 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 09:29:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-07 09:29:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2019-09-07 09:29:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-07 09:29:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2019-09-07 09:29:17,469 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 32 [2019-09-07 09:29:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:17,470 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2019-09-07 09:29:17,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:29:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2019-09-07 09:29:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 09:29:17,476 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:17,476 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:17,476 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:17,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:17,477 INFO L82 PathProgramCache]: Analyzing trace with hash 251118271, now seen corresponding path program 6 times [2019-09-07 09:29:17,477 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:17,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:17,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:17,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:17,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 09:29:17,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:17,600 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 09:29:17,620 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:17,683 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-07 09:29:17,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:17,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:29:17,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 09:29:17,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:17,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 09:29:17,716 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:29:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:29:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:29:17,716 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand 8 states. [2019-09-07 09:29:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:17,754 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2019-09-07 09:29:17,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:29:17,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2019-09-07 09:29:17,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:17,761 INFO L225 Difference]: With dead ends: 104 [2019-09-07 09:29:17,761 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 09:29:17,762 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:29:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 09:29:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-09-07 09:29:17,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-07 09:29:17,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-09-07 09:29:17,778 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 35 [2019-09-07 09:29:17,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:17,779 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-09-07 09:29:17,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:29:17,779 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-09-07 09:29:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 09:29:17,784 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:17,784 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:17,784 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -687620259, now seen corresponding path program 7 times [2019-09-07 09:29:17,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:17,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:17,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:17,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:17,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:29:17,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:17,903 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:29:17,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:17,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:29:17,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-09-07 09:29:18,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:18,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2019-09-07 09:29:18,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:29:18,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:29:18,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:29:18,033 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 13 states. [2019-09-07 09:29:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:18,236 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2019-09-07 09:29:18,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 09:29:18,238 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2019-09-07 09:29:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:18,239 INFO L225 Difference]: With dead ends: 116 [2019-09-07 09:29:18,239 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 09:29:18,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:29:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 09:29:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-09-07 09:29:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-07 09:29:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2019-09-07 09:29:18,264 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 37 [2019-09-07 09:29:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:18,264 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2019-09-07 09:29:18,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:29:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2019-09-07 09:29:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 09:29:18,266 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:18,266 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:18,266 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash 495426353, now seen corresponding path program 8 times [2019-09-07 09:29:18,267 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:18,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:18,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:18,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-07 09:29:18,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:18,372 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) [2019-09-07 09:29:18,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:18,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:18,434 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:18,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:29:18,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-09-07 09:29:18,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:18,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:29:18,532 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:29:18,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:29:18,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:29:18,533 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 15 states. [2019-09-07 09:29:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:18,667 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2019-09-07 09:29:18,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:29:18,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2019-09-07 09:29:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:18,670 INFO L225 Difference]: With dead ends: 130 [2019-09-07 09:29:18,670 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 09:29:18,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:29:18,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 09:29:18,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2019-09-07 09:29:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-07 09:29:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2019-09-07 09:29:18,686 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 42 [2019-09-07 09:29:18,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:18,687 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2019-09-07 09:29:18,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:29:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2019-09-07 09:29:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:29:18,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:18,692 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:18,692 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash -372615207, now seen corresponding path program 9 times [2019-09-07 09:29:18,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:18,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:18,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:18,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:18,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:29:18,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:18,792 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 09:29:18,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:19,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:29:19,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:19,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:29:19,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-09-07 09:29:19,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:19,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:29:19,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:29:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:29:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:29:19,076 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 10 states. [2019-09-07 09:29:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:19,133 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2019-09-07 09:29:19,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:29:19,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-09-07 09:29:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:19,136 INFO L225 Difference]: With dead ends: 105 [2019-09-07 09:29:19,136 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 09:29:19,138 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:29:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 09:29:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2019-09-07 09:29:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-07 09:29:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2019-09-07 09:29:19,147 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 47 [2019-09-07 09:29:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:19,147 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2019-09-07 09:29:19,147 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:29:19,148 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2019-09-07 09:29:19,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-07 09:29:19,152 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:19,152 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:19,152 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2023959315, now seen corresponding path program 10 times [2019-09-07 09:29:19,158 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:19,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:19,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:19,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:19,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-07 09:29:19,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:19,264 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:19,282 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:29:19,324 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:29:19,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:19,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:29:19,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:29:19,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:19,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:29:19,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:29:19,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:29:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:29:19,351 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand 11 states. [2019-09-07 09:29:19,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:19,408 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2019-09-07 09:29:19,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:29:19,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2019-09-07 09:29:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:19,411 INFO L225 Difference]: With dead ends: 146 [2019-09-07 09:29:19,412 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 09:29:19,413 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:29:19,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 09:29:19,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-09-07 09:29:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-07 09:29:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2019-09-07 09:29:19,421 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 50 [2019-09-07 09:29:19,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:19,421 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2019-09-07 09:29:19,421 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:29:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2019-09-07 09:29:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-07 09:29:19,424 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:19,424 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:19,425 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash 128360117, now seen corresponding path program 11 times [2019-09-07 09:29:19,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:19,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:19,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:19,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:19,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-09-07 09:29:19,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:19,556 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:19,579 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:29:25,175 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:29:25,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:25,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:29:25,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-07 09:29:25,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:25,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-09-07 09:29:25,332 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:29:25,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:29:25,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:29:25,333 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand 19 states. [2019-09-07 09:29:25,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:25,513 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2019-09-07 09:29:25,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:29:25,513 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2019-09-07 09:29:25,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:25,515 INFO L225 Difference]: With dead ends: 158 [2019-09-07 09:29:25,515 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 09:29:25,516 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:29:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 09:29:25,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2019-09-07 09:29:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-07 09:29:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2019-09-07 09:29:25,521 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 52 [2019-09-07 09:29:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:25,521 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2019-09-07 09:29:25,521 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:29:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2019-09-07 09:29:25,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-07 09:29:25,522 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:25,522 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:25,523 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:25,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash 169519189, now seen corresponding path program 12 times [2019-09-07 09:29:25,523 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:25,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:25,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:25,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:25,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-09-07 09:29:25,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:25,618 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 09:29:25,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:29:27,382 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:29:27,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:27,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:29:27,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 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 09:29:27,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:27,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:29:27,551 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:29:27,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:29:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:29:27,554 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand 21 states. [2019-09-07 09:29:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:27,779 INFO L93 Difference]: Finished difference Result 172 states and 220 transitions. [2019-09-07 09:29:27,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:29:27,781 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2019-09-07 09:29:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:27,782 INFO L225 Difference]: With dead ends: 172 [2019-09-07 09:29:27,782 INFO L226 Difference]: Without dead ends: 105 [2019-09-07 09:29:27,783 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:29:27,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-07 09:29:27,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2019-09-07 09:29:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 09:29:27,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2019-09-07 09:29:27,788 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 57 [2019-09-07 09:29:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:27,788 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2019-09-07 09:29:27,788 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:29:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2019-09-07 09:29:27,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-07 09:29:27,789 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:27,790 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:27,790 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:27,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:27,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1221457351, now seen corresponding path program 13 times [2019-09-07 09:29:27,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:27,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:27,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:27,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:27,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-07 09:29:27,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:27,902 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 09:29:27,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:27,970 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:29:27,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-09-07 09:29:28,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:28,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-09-07 09:29:28,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:29:28,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:29:28,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:29:28,144 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand 23 states. [2019-09-07 09:29:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:28,378 INFO L93 Difference]: Finished difference Result 186 states and 238 transitions. [2019-09-07 09:29:28,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:29:28,379 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2019-09-07 09:29:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:28,380 INFO L225 Difference]: With dead ends: 186 [2019-09-07 09:29:28,380 INFO L226 Difference]: Without dead ends: 113 [2019-09-07 09:29:28,381 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 09:29:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-07 09:29:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2019-09-07 09:29:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-07 09:29:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2019-09-07 09:29:28,387 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 62 [2019-09-07 09:29:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:28,387 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2019-09-07 09:29:28,387 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:29:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2019-09-07 09:29:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 09:29:28,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:28,389 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:28,389 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:28,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash 512258257, now seen corresponding path program 14 times [2019-09-07 09:29:28,390 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:28,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:28,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:28,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:29:28,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-09-07 09:29:28,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:28,531 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) [2019-09-07 09:29:28,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:28,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:29:28,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:28,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:29:28,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-09-07 09:29:28,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:28,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:29:28,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:29:28,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:29:28,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:29:28,805 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand 25 states. [2019-09-07 09:29:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:29,058 INFO L93 Difference]: Finished difference Result 200 states and 256 transitions. [2019-09-07 09:29:29,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:29:29,060 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2019-09-07 09:29:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:29,061 INFO L225 Difference]: With dead ends: 200 [2019-09-07 09:29:29,062 INFO L226 Difference]: Without dead ends: 121 [2019-09-07 09:29:29,063 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=864, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:29:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-07 09:29:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2019-09-07 09:29:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 09:29:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2019-09-07 09:29:29,068 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 67 [2019-09-07 09:29:29,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:29,069 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2019-09-07 09:29:29,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:29:29,070 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2019-09-07 09:29:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 09:29:29,071 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:29,071 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:29,071 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:29,072 INFO L82 PathProgramCache]: Analyzing trace with hash -854188611, now seen corresponding path program 15 times [2019-09-07 09:29:29,072 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:29,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:29,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:29,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:29,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-07 09:29:29,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:29,211 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) [2019-09-07 09:29:29,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:36,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:29:36,846 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:36,853 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:29:36,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 144 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 09:29:36,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:36,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:29:36,886 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:29:36,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:29:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:29:36,887 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand 15 states. [2019-09-07 09:29:36,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:36,959 INFO L93 Difference]: Finished difference Result 145 states and 181 transitions. [2019-09-07 09:29:36,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:29:36,960 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2019-09-07 09:29:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:36,961 INFO L225 Difference]: With dead ends: 145 [2019-09-07 09:29:36,962 INFO L226 Difference]: Without dead ends: 126 [2019-09-07 09:29:36,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:29:36,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-09-07 09:29:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2019-09-07 09:29:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 09:29:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2019-09-07 09:29:36,968 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 72 [2019-09-07 09:29:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:36,968 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2019-09-07 09:29:36,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:29:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2019-09-07 09:29:36,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 09:29:36,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:36,969 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:36,969 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:36,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:36,970 INFO L82 PathProgramCache]: Analyzing trace with hash 661449391, now seen corresponding path program 16 times [2019-09-07 09:29:36,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:36,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:36,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:36,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:36,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-07 09:29:37,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:37,121 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:37,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:29:37,247 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:29:37,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:29:37,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:29:37,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:29:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-09-07 09:29:37,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:29:37,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:29:37,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:29:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:29:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:29:37,275 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand 16 states. [2019-09-07 09:29:37,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:29:37,333 INFO L93 Difference]: Finished difference Result 216 states and 274 transitions. [2019-09-07 09:29:37,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:29:37,335 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2019-09-07 09:29:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:29:37,336 INFO L225 Difference]: With dead ends: 216 [2019-09-07 09:29:37,336 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 09:29:37,337 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:29:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 09:29:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2019-09-07 09:29:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 09:29:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2019-09-07 09:29:37,343 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 75 [2019-09-07 09:29:37,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:29:37,343 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2019-09-07 09:29:37,344 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:29:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2019-09-07 09:29:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-07 09:29:37,345 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:29:37,345 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:29:37,345 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:29:37,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:29:37,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1034383693, now seen corresponding path program 17 times [2019-09-07 09:29:37,346 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:29:37,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:29:37,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:37,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:29:37,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:29:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:29:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:29:37,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:29:37,528 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:29:37,539 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:30:30,137 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 09:30:30,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:30,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:30:30,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-09-07 09:30:30,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:30,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:30:30,205 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:30:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:30:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:30:30,206 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand 16 states. [2019-09-07 09:30:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:30,266 INFO L93 Difference]: Finished difference Result 153 states and 191 transitions. [2019-09-07 09:30:30,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:30:30,266 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2019-09-07 09:30:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:30,268 INFO L225 Difference]: With dead ends: 153 [2019-09-07 09:30:30,268 INFO L226 Difference]: Without dead ends: 134 [2019-09-07 09:30:30,269 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:30:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-09-07 09:30:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2019-09-07 09:30:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-07 09:30:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2019-09-07 09:30:30,274 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 77 [2019-09-07 09:30:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:30,274 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2019-09-07 09:30:30,274 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:30:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2019-09-07 09:30:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 09:30:30,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:30,275 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:30,275 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -952619745, now seen corresponding path program 18 times [2019-09-07 09:30:30,276 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:30,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:30,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:30,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:30,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:30,467 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-07 09:30:30,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:30,468 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:30:30,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:30:46,272 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-09-07 09:30:46,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:46,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:30:46,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-07 09:30:46,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:46,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 09:30:46,335 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:30:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:30:46,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:30:46,336 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand 17 states. [2019-09-07 09:30:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:46,415 INFO L93 Difference]: Finished difference Result 230 states and 292 transitions. [2019-09-07 09:30:46,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 09:30:46,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 80 [2019-09-07 09:30:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:46,417 INFO L225 Difference]: With dead ends: 230 [2019-09-07 09:30:46,417 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 09:30:46,417 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:30:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 09:30:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-09-07 09:30:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 09:30:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2019-09-07 09:30:46,423 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 80 [2019-09-07 09:30:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:46,423 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2019-09-07 09:30:46,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:30:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2019-09-07 09:30:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-07 09:30:46,424 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:46,424 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:46,424 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:46,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1010768193, now seen corresponding path program 19 times [2019-09-07 09:30:46,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:46,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:46,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:46,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:46,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-09-07 09:30:46,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:46,615 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 09:30:46,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:46,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:30:46,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-09-07 09:30:46,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:46,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 09:30:46,941 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:30:46,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:30:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:30:46,942 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand 31 states. [2019-09-07 09:30:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:47,297 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2019-09-07 09:30:47,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:30:47,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 82 [2019-09-07 09:30:47,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:47,302 INFO L225 Difference]: With dead ends: 242 [2019-09-07 09:30:47,302 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 09:30:47,303 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=720, Invalid=1350, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 09:30:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 09:30:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2019-09-07 09:30:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-07 09:30:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2019-09-07 09:30:47,308 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 82 [2019-09-07 09:30:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:47,309 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2019-09-07 09:30:47,309 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:30:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2019-09-07 09:30:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 09:30:47,310 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:47,310 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:47,310 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:47,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1442092599, now seen corresponding path program 20 times [2019-09-07 09:30:47,311 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:47,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:47,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:47,312 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:30:47,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:30:47,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:47,474 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:30:47,485 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:30:47,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:30:47,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:30:47,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:30:47,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:30:47,824 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:30:47,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:30:47,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2019-09-07 09:30:47,833 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-07 09:30:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-07 09:30:47,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 09:30:47,834 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand 33 states. [2019-09-07 09:30:48,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:30:48,177 INFO L93 Difference]: Finished difference Result 256 states and 328 transitions. [2019-09-07 09:30:48,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 09:30:48,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2019-09-07 09:30:48,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:30:48,179 INFO L225 Difference]: With dead ends: 256 [2019-09-07 09:30:48,179 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 09:30:48,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=816, Invalid=1536, Unknown=0, NotChecked=0, Total=2352 [2019-09-07 09:30:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 09:30:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2019-09-07 09:30:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-07 09:30:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2019-09-07 09:30:48,189 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 87 [2019-09-07 09:30:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:30:48,190 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2019-09-07 09:30:48,190 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-07 09:30:48,190 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2019-09-07 09:30:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-07 09:30:48,191 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:30:48,191 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:30:48,191 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:30:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:30:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1301888197, now seen corresponding path program 21 times [2019-09-07 09:30:48,192 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:30:48,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:30:48,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:48,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:30:48,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:30:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:30:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2019-09-07 09:30:48,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:30:48,410 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 09:30:48,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:31:27,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 09:31:27,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:27,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:31:27,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 31 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-09-07 09:31:27,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:27,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 21 [2019-09-07 09:31:27,159 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:31:27,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:31:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=212, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:31:27,161 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand 21 states. [2019-09-07 09:31:27,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:27,255 INFO L93 Difference]: Finished difference Result 177 states and 221 transitions. [2019-09-07 09:31:27,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:31:27,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 92 [2019-09-07 09:31:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:27,258 INFO L225 Difference]: With dead ends: 177 [2019-09-07 09:31:27,258 INFO L226 Difference]: Without dead ends: 158 [2019-09-07 09:31:27,259 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=250, Invalid=256, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:31:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-09-07 09:31:27,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2019-09-07 09:31:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2019-09-07 09:31:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 191 transitions. [2019-09-07 09:31:27,266 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 191 transitions. Word has length 92 [2019-09-07 09:31:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:27,266 INFO L475 AbstractCegarLoop]: Abstraction has 154 states and 191 transitions. [2019-09-07 09:31:27,266 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:31:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 191 transitions. [2019-09-07 09:31:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 09:31:27,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:27,272 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:27,272 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:27,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1109724839, now seen corresponding path program 22 times [2019-09-07 09:31:27,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:27,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:27,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-07 09:31:27,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:27,516 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:27,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:31:27,681 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:31:27,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:27,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:31:27,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-07 09:31:27,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:27,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:31:27,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:31:27,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:31:27,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:31:27,723 INFO L87 Difference]: Start difference. First operand 154 states and 191 transitions. Second operand 20 states. [2019-09-07 09:31:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:27,796 INFO L93 Difference]: Finished difference Result 272 states and 346 transitions. [2019-09-07 09:31:27,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:31:27,797 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 95 [2019-09-07 09:31:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:27,799 INFO L225 Difference]: With dead ends: 272 [2019-09-07 09:31:27,799 INFO L226 Difference]: Without dead ends: 157 [2019-09-07 09:31:27,799 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:31:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-07 09:31:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-09-07 09:31:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 09:31:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2019-09-07 09:31:27,805 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 95 [2019-09-07 09:31:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:27,805 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2019-09-07 09:31:27,806 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:31:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2019-09-07 09:31:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-07 09:31:27,807 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:27,807 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:27,807 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:27,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:27,807 INFO L82 PathProgramCache]: Analyzing trace with hash -834135483, now seen corresponding path program 23 times [2019-09-07 09:31:27,808 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:27,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:27,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:27,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-09-07 09:31:28,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:28,048 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 09:31:28,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:33:02,823 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-07 09:33:02,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:02,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:33:02,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-09-07 09:33:03,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:03,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:33:03,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:33:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:33:03,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:33:03,224 INFO L87 Difference]: Start difference. First operand 156 states and 193 transitions. Second operand 37 states. [2019-09-07 09:33:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:03,631 INFO L93 Difference]: Finished difference Result 284 states and 364 transitions. [2019-09-07 09:33:03,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:33:03,632 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 97 [2019-09-07 09:33:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:03,633 INFO L225 Difference]: With dead ends: 284 [2019-09-07 09:33:03,633 INFO L226 Difference]: Without dead ends: 169 [2019-09-07 09:33:03,635 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1026, Invalid=1944, Unknown=0, NotChecked=0, Total=2970 [2019-09-07 09:33:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-07 09:33:03,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2019-09-07 09:33:03,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-07 09:33:03,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2019-09-07 09:33:03,642 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 97 [2019-09-07 09:33:03,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:03,643 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2019-09-07 09:33:03,643 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:33:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2019-09-07 09:33:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 09:33:03,644 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:03,644 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:03,644 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1542404023, now seen corresponding path program 24 times [2019-09-07 09:33:03,645 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:03,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:03,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-09-07 09:33:03,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:03,886 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 09:33:03,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:34:28,121 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-07 09:34:28,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:28,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:34:28,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-09-07 09:34:28,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:28,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2019-09-07 09:34:28,588 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 09:34:28,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 09:34:28,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:34:28,590 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 39 states. [2019-09-07 09:34:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:29,074 INFO L93 Difference]: Finished difference Result 298 states and 382 transitions. [2019-09-07 09:34:29,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 09:34:29,075 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 102 [2019-09-07 09:34:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:29,077 INFO L225 Difference]: With dead ends: 298 [2019-09-07 09:34:29,077 INFO L226 Difference]: Without dead ends: 177 [2019-09-07 09:34:29,079 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1140, Invalid=2166, Unknown=0, NotChecked=0, Total=3306 [2019-09-07 09:34:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-07 09:34:29,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 172. [2019-09-07 09:34:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-07 09:34:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2019-09-07 09:34:29,085 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 102 [2019-09-07 09:34:29,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:29,086 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2019-09-07 09:34:29,086 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 09:34:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2019-09-07 09:34:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 09:34:29,087 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:29,087 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:29,087 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash 955335361, now seen corresponding path program 25 times [2019-09-07 09:34:29,088 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:29,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:29,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:29,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:29,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2019-09-07 09:34:29,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:29,346 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:34:29,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:29,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:34:29,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-09-07 09:34:29,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:29,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2019-09-07 09:34:29,810 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 09:34:29,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 09:34:29,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:34:29,812 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand 41 states. [2019-09-07 09:34:30,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:30,266 INFO L93 Difference]: Finished difference Result 312 states and 400 transitions. [2019-09-07 09:34:30,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 09:34:30,266 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 107 [2019-09-07 09:34:30,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:30,268 INFO L225 Difference]: With dead ends: 312 [2019-09-07 09:34:30,268 INFO L226 Difference]: Without dead ends: 185 [2019-09-07 09:34:30,270 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1260, Invalid=2400, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 09:34:30,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2019-09-07 09:34:30,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 180. [2019-09-07 09:34:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-07 09:34:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 223 transitions. [2019-09-07 09:34:30,276 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 223 transitions. Word has length 107 [2019-09-07 09:34:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:30,276 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 223 transitions. [2019-09-07 09:34:30,276 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 09:34:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 223 transitions. [2019-09-07 09:34:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 09:34:30,277 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:30,277 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:30,277 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1083309005, now seen corresponding path program 26 times [2019-09-07 09:34:30,278 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:30,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:30,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:30,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:34:30,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:30,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-09-07 09:34:30,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:30,599 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 09:34:30,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:34:30,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:34:30,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:34:30,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:34:30,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:34:31,235 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-09-07 09:34:31,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:34:31,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2019-09-07 09:34:31,241 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 09:34:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 09:34:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:34:31,243 INFO L87 Difference]: Start difference. First operand 180 states and 223 transitions. Second operand 43 states. [2019-09-07 09:34:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:34:31,736 INFO L93 Difference]: Finished difference Result 326 states and 418 transitions. [2019-09-07 09:34:31,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 09:34:31,741 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 112 [2019-09-07 09:34:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:34:31,742 INFO L225 Difference]: With dead ends: 326 [2019-09-07 09:34:31,742 INFO L226 Difference]: Without dead ends: 193 [2019-09-07 09:34:31,745 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1386, Invalid=2646, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 09:34:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-09-07 09:34:31,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2019-09-07 09:34:31,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-09-07 09:34:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2019-09-07 09:34:31,751 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 112 [2019-09-07 09:34:31,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:34:31,751 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2019-09-07 09:34:31,751 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 09:34:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2019-09-07 09:34:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-09-07 09:34:31,752 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:34:31,753 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:34:31,753 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:34:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:34:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1734696131, now seen corresponding path program 27 times [2019-09-07 09:34:31,754 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:34:31,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:34:31,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:31,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:34:31,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:34:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:34:32,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:34:32,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:34:32,049 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 09:34:32,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:36:07,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-07 09:36:07,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:36:07,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 09:36:07,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-09-07 09:36:07,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:07,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 09:36:07,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:36:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:36:07,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:36:07,483 INFO L87 Difference]: Start difference. First operand 188 states and 233 transitions. Second operand 24 states. [2019-09-07 09:36:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:07,567 INFO L93 Difference]: Finished difference Result 217 states and 271 transitions. [2019-09-07 09:36:07,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:36:07,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2019-09-07 09:36:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:07,568 INFO L225 Difference]: With dead ends: 217 [2019-09-07 09:36:07,569 INFO L226 Difference]: Without dead ends: 198 [2019-09-07 09:36:07,570 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:36:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-09-07 09:36:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2019-09-07 09:36:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 09:36:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 241 transitions. [2019-09-07 09:36:07,575 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 241 transitions. Word has length 117 [2019-09-07 09:36:07,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:07,576 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 241 transitions. [2019-09-07 09:36:07,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:36:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 241 transitions. [2019-09-07 09:36:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 09:36:07,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:07,577 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:07,577 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1172802257, now seen corresponding path program 28 times [2019-09-07 09:36:07,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:07,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:07,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:07,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:07,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-07 09:36:07,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:07,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:36:07,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:36:08,064 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:36:08,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:36:08,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:36:08,070 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-07 09:36:08,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:08,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 09:36:08,092 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:36:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:36:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:36:08,093 INFO L87 Difference]: Start difference. First operand 194 states and 241 transitions. Second operand 25 states. [2019-09-07 09:36:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:08,193 INFO L93 Difference]: Finished difference Result 342 states and 436 transitions. [2019-09-07 09:36:08,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:36:08,196 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 120 [2019-09-07 09:36:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:08,198 INFO L225 Difference]: With dead ends: 342 [2019-09-07 09:36:08,198 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 09:36:08,199 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:36:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 09:36:08,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-09-07 09:36:08,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 09:36:08,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2019-09-07 09:36:08,205 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 120 [2019-09-07 09:36:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:08,205 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2019-09-07 09:36:08,206 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:36:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2019-09-07 09:36:08,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-07 09:36:08,207 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:08,207 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:08,207 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:08,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:08,207 INFO L82 PathProgramCache]: Analyzing trace with hash -2046224559, now seen corresponding path program 29 times [2019-09-07 09:36:08,207 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:08,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:08,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:08,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:08,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-07 09:36:08,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:08,578 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:36:08,588 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:38:44,653 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-09-07 09:38:44,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:38:44,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:38:44,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:38:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2019-09-07 09:38:45,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:38:45,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-09-07 09:38:45,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-07 09:38:45,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-07 09:38:45,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:38:45,183 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand 47 states. [2019-09-07 09:38:45,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:38:45,762 INFO L93 Difference]: Finished difference Result 354 states and 454 transitions. [2019-09-07 09:38:45,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-07 09:38:45,762 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 122 [2019-09-07 09:38:45,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:38:45,764 INFO L225 Difference]: With dead ends: 354 [2019-09-07 09:38:45,764 INFO L226 Difference]: Without dead ends: 209 [2019-09-07 09:38:45,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1656, Invalid=3174, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 09:38:45,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-07 09:38:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 204. [2019-09-07 09:38:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-09-07 09:38:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 253 transitions. [2019-09-07 09:38:45,773 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 253 transitions. Word has length 122 [2019-09-07 09:38:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:38:45,773 INFO L475 AbstractCegarLoop]: Abstraction has 204 states and 253 transitions. [2019-09-07 09:38:45,773 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-07 09:38:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 253 transitions. [2019-09-07 09:38:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-07 09:38:45,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:38:45,774 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:38:45,774 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:38:45,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:38:45,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1210582087, now seen corresponding path program 30 times [2019-09-07 09:38:45,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:38:45,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:38:45,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:45,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:38:45,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:38:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:38:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-09-07 09:38:46,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:38:46,067 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 09:38:46,079 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:41:13,738 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-09-07 09:41:13,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:13,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 09:41:13,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 45 proven. 715 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2019-09-07 09:41:13,865 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:13,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 28 [2019-09-07 09:41:13,866 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:41:13,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:41:13,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=380, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:41:13,867 INFO L87 Difference]: Start difference. First operand 204 states and 253 transitions. Second operand 28 states. [2019-09-07 09:41:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:13,992 INFO L93 Difference]: Finished difference Result 233 states and 291 transitions. [2019-09-07 09:41:13,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:41:13,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2019-09-07 09:41:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:13,994 INFO L225 Difference]: With dead ends: 233 [2019-09-07 09:41:13,995 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 09:41:13,995 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=432, Invalid=438, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:41:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 09:41:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2019-09-07 09:41:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2019-09-07 09:41:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 261 transitions. [2019-09-07 09:41:14,002 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 261 transitions. Word has length 127 [2019-09-07 09:41:14,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:14,003 INFO L475 AbstractCegarLoop]: Abstraction has 210 states and 261 transitions. [2019-09-07 09:41:14,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:41:14,003 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 261 transitions. [2019-09-07 09:41:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 09:41:14,005 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:14,005 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:14,005 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 502561587, now seen corresponding path program 31 times [2019-09-07 09:41:14,006 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:14,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:14,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:14,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:14,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-07 09:41:14,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:14,368 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) [2019-09-07 09:41:14,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:41:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:14,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 09:41:14,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-07 09:41:14,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:14,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 09:41:14,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:41:14,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:41:14,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:41:14,528 INFO L87 Difference]: Start difference. First operand 210 states and 261 transitions. Second operand 27 states. [2019-09-07 09:41:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:14,617 INFO L93 Difference]: Finished difference Result 370 states and 472 transitions. [2019-09-07 09:41:14,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 09:41:14,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2019-09-07 09:41:14,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:14,619 INFO L225 Difference]: With dead ends: 370 [2019-09-07 09:41:14,619 INFO L226 Difference]: Without dead ends: 213 [2019-09-07 09:41:14,620 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:41:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-09-07 09:41:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2019-09-07 09:41:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-07 09:41:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2019-09-07 09:41:14,625 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 130 [2019-09-07 09:41:14,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:14,625 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2019-09-07 09:41:14,626 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:41:14,626 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2019-09-07 09:41:14,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-09-07 09:41:14,627 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:14,627 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:14,627 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:14,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1029855957, now seen corresponding path program 32 times [2019-09-07 09:41:14,627 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:14,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:14,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:14,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:41:14,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:15,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-09-07 09:41:15,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:15,002 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:41:15,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:41:15,101 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:41:15,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:41:15,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:41:15,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:41:15,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2019-09-07 09:41:15,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:41:15,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2019-09-07 09:41:15,562 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-07 09:41:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-07 09:41:15,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:41:15,564 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand 51 states. [2019-09-07 09:41:16,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:41:16,158 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2019-09-07 09:41:16,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-07 09:41:16,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 132 [2019-09-07 09:41:16,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:41:16,160 INFO L225 Difference]: With dead ends: 382 [2019-09-07 09:41:16,160 INFO L226 Difference]: Without dead ends: 225 [2019-09-07 09:41:16,163 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1950, Invalid=3750, Unknown=0, NotChecked=0, Total=5700 [2019-09-07 09:41:16,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-09-07 09:41:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2019-09-07 09:41:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-07 09:41:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 273 transitions. [2019-09-07 09:41:16,169 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 273 transitions. Word has length 132 [2019-09-07 09:41:16,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:41:16,169 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 273 transitions. [2019-09-07 09:41:16,170 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-07 09:41:16,170 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 273 transitions. [2019-09-07 09:41:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 09:41:16,171 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:41:16,171 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:41:16,171 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:41:16,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:41:16,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2034043957, now seen corresponding path program 33 times [2019-09-07 09:41:16,172 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:41:16,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:41:16,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:16,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:41:16,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:41:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:41:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-09-07 09:41:16,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:41:16,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:41:16,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:43:52,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-09-07 09:43:52,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:53,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:43:53,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2019-09-07 09:43:53,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:53,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 09:43:53,132 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:43:53,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:43:53,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:43:53,133 INFO L87 Difference]: Start difference. First operand 220 states and 273 transitions. Second operand 28 states. [2019-09-07 09:43:53,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:53,216 INFO L93 Difference]: Finished difference Result 249 states and 311 transitions. [2019-09-07 09:43:53,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:43:53,217 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2019-09-07 09:43:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:53,219 INFO L225 Difference]: With dead ends: 249 [2019-09-07 09:43:53,219 INFO L226 Difference]: Without dead ends: 230 [2019-09-07 09:43:53,221 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:43:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-09-07 09:43:53,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2019-09-07 09:43:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 09:43:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 281 transitions. [2019-09-07 09:43:53,228 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 281 transitions. Word has length 137 [2019-09-07 09:43:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:53,229 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 281 transitions. [2019-09-07 09:43:53,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:43:53,230 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 281 transitions. [2019-09-07 09:43:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-07 09:43:53,231 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:53,231 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:53,231 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:53,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1376925385, now seen corresponding path program 34 times [2019-09-07 09:43:53,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:53,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:53,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:53,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:53,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-07 09:43:53,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:53,559 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:53,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST