java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapavg1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:56:14,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:56:14,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:56:14,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 11:56:14,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 11:56:14,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 11:56:14,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 11:56:14,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 11:56:14,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 11:56:14,578 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 11:56:14,579 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 11:56:14,580 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 11:56:14,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:56:14,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:56:14,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:56:14,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:56:14,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:56:14,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:56:14,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:56:14,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:56:14,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:56:14,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:56:14,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:56:14,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:56:14,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:56:14,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:56:14,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:56:14,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:56:14,606 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 11:56:14,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:56:14,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:56:14,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:56:14,622 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:56:14,622 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:56:14,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:56:14,623 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:56:14,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:56:14,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:56:14,623 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:56:14,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:56:14,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:56:14,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:56:14,624 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:56:14,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:56:14,625 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:56:14,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:56:14,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:56:14,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:56:14,625 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:56:14,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:56:14,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:56:14,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:56:14,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:56:14,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:56:14,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:56:14,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:56:14,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:56:14,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:56:14,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:56:14,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:56:14,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:56:14,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:56:14,673 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:56:14,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg1.i [2019-09-07 11:56:14,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928010bf4/dff4212706e744759a84af78fc712ba1/FLAG8429e7c52 [2019-09-07 11:56:15,137 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:56:15,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg1.i [2019-09-07 11:56:15,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928010bf4/dff4212706e744759a84af78fc712ba1/FLAG8429e7c52 [2019-09-07 11:56:15,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928010bf4/dff4212706e744759a84af78fc712ba1 [2019-09-07 11:56:15,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:56:15,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:56:15,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:56:15,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:56:15,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:56:15,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46d0d47c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15, skipping insertion in model container [2019-09-07 11:56:15,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,541 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:56:15,558 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:56:15,744 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:56:15,753 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:56:15,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:56:15,791 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:56:15,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15 WrapperNode [2019-09-07 11:56:15,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:56:15,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:56:15,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:56:15,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:56:15,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (1/1) ... [2019-09-07 11:56:15,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:56:15,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:56:15,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:56:15,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:56:15,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (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 11:56:16,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:56:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:56:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-09-07 11:56:16,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:56:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:56:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:56:16,001 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-09-07 11:56:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:56:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:56:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:56:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:56:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:56:16,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:56:16,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:56:16,313 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:56:16,313 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 11:56:16,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:56:16 BoogieIcfgContainer [2019-09-07 11:56:16,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:56:16,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:56:16,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:56:16,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:56:16,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:56:15" (1/3) ... [2019-09-07 11:56:16,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c825222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:56:16, skipping insertion in model container [2019-09-07 11:56:16,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:56:15" (2/3) ... [2019-09-07 11:56:16,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c825222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:56:16, skipping insertion in model container [2019-09-07 11:56:16,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:56:16" (3/3) ... [2019-09-07 11:56:16,326 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg1.i [2019-09-07 11:56:16,337 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:56:16,345 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:56:16,362 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:56:16,390 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:56:16,390 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:56:16,391 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:56:16,391 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:56:16,391 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:56:16,391 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:56:16,391 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:56:16,391 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:56:16,391 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:56:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-07 11:56:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:56:16,414 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:16,415 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:16,417 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:16,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:16,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1234592251, now seen corresponding path program 1 times [2019-09-07 11:56:16,424 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:16,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:16,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:16,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:16,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:56:16,595 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:56:16,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:56:16,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:56:16,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:56:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:56:16,618 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-07 11:56:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:16,659 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-07 11:56:16,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:56:16,662 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 11:56:16,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:16,677 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:56:16,678 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 11:56:16,685 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 11:56:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 11:56:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-07 11:56:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 11:56:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 11:56:16,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-07 11:56:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:16,761 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 11:56:16,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:56:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 11:56:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:56:16,767 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:16,768 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:16,768 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:16,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:16,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1054720325, now seen corresponding path program 1 times [2019-09-07 11:56:16,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:16,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:16,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:16,773 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:16,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:56:16,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:56:16,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:56:16,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:56:16,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:56:16,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:56:16,890 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-07 11:56:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:16,930 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 11:56:16,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:56:16,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 11:56:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:16,932 INFO L225 Difference]: With dead ends: 46 [2019-09-07 11:56:16,933 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 11:56:16,934 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 11:56:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 11:56:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-07 11:56:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 11:56:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 11:56:16,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-07 11:56:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:16,947 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 11:56:16,947 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:56:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 11:56:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 11:56:16,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:16,950 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:16,950 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1286970653, now seen corresponding path program 1 times [2019-09-07 11:56:16,952 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:16,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:16,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:16,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:16,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 11:56:17,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:17,054 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:17,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:17,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:56:17,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:56:17,175 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:56:17,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 11:56:17,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:56:17,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:56:17,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:56:17,177 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-07 11:56:17,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:17,197 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-07 11:56:17,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:56:17,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 11:56:17,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:17,199 INFO L225 Difference]: With dead ends: 46 [2019-09-07 11:56:17,199 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 11:56:17,200 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:56:17,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 11:56:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 11:56:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 11:56:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 11:56:17,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-07 11:56:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:17,207 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 11:56:17,207 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:56:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 11:56:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 11:56:17,208 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:17,209 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:17,209 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:17,209 INFO L82 PathProgramCache]: Analyzing trace with hash -631694085, now seen corresponding path program 1 times [2019-09-07 11:56:17,210 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:17,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:17,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:17,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:56:17,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:56:17,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:56:17,305 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:56:17,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:56:17,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:56:17,307 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 11:56:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:17,331 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-07 11:56:17,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:56:17,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-07 11:56:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:17,336 INFO L225 Difference]: With dead ends: 43 [2019-09-07 11:56:17,336 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 11:56:17,337 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 11:56:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 11:56:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 11:56:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 11:56:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 11:56:17,343 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-07 11:56:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:17,346 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 11:56:17,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:56:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 11:56:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 11:56:17,347 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:17,348 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:17,348 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -490156423, now seen corresponding path program 1 times [2019-09-07 11:56:17,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:17,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:17,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:17,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:56:17,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:17,448 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:17,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:56:17,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:56:17,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:17,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 11:56:17,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:56:17,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:56:17,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:56:17,562 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-07 11:56:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:17,625 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-07 11:56:17,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:56:17,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-07 11:56:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:17,629 INFO L225 Difference]: With dead ends: 52 [2019-09-07 11:56:17,629 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 11:56:17,631 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:56:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 11:56:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 11:56:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 11:56:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 11:56:17,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-07 11:56:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:17,637 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 11:56:17,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:56:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 11:56:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-07 11:56:17,639 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:17,639 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:17,639 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1271601755, now seen corresponding path program 2 times [2019-09-07 11:56:17,640 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:17,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:56:17,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:17,708 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:17,722 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:17,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:56:17,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:17,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:56:17,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:56:17,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:17,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 11:56:17,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:56:17,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:56:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:56:17,789 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-09-07 11:56:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:17,840 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-09-07 11:56:17,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:56:17,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-09-07 11:56:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:17,843 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:56:17,844 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 11:56:17,844 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:56:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 11:56:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-07 11:56:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 11:56:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-07 11:56:17,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 44 [2019-09-07 11:56:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:17,861 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-07 11:56:17,861 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:56:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-07 11:56:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 11:56:17,862 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:17,862 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:17,863 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:17,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:17,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2104096189, now seen corresponding path program 3 times [2019-09-07 11:56:17,865 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:17,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:17,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:17,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-09-07 11:56:17,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:17,971 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:17,994 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:18,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 11:56:18,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:18,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:56:18,039 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-07 11:56:18,076 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:18,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-09-07 11:56:18,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:56:18,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:56:18,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:56:18,080 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-09-07 11:56:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:18,140 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-09-07 11:56:18,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:56:18,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-09-07 11:56:18,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:18,145 INFO L225 Difference]: With dead ends: 58 [2019-09-07 11:56:18,145 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 11:56:18,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:56:18,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 11:56:18,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 11:56:18,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 11:56:18,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-07 11:56:18,151 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 46 [2019-09-07 11:56:18,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:18,152 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-07 11:56:18,152 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:56:18,152 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-07 11:56:18,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 11:56:18,153 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:18,153 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:18,154 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:18,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:18,154 INFO L82 PathProgramCache]: Analyzing trace with hash -631599591, now seen corresponding path program 4 times [2019-09-07 11:56:18,154 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:18,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:18,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:18,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:18,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 11:56:18,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:18,240 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) [2019-09-07 11:56:18,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:18,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:56:18,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:18,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:56:18,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:56:18,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:18,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 11:56:18,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:56:18,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:56:18,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:56:18,338 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-09-07 11:56:18,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:18,384 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-09-07 11:56:18,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:56:18,385 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-09-07 11:56:18,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:18,386 INFO L225 Difference]: With dead ends: 64 [2019-09-07 11:56:18,386 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 11:56:18,387 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:56:18,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 11:56:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-07 11:56:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 11:56:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-07 11:56:18,398 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2019-09-07 11:56:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:18,398 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-07 11:56:18,399 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:56:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-07 11:56:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 11:56:18,400 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:18,400 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:18,400 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:18,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1024452869, now seen corresponding path program 5 times [2019-09-07 11:56:18,401 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:18,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:18,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:18,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:18,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:18,503 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 11:56:18,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:18,503 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 11:56:18,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:18,584 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 11:56:18,585 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:18,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:56:18,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-07 11:56:18,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:18,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 11:56:18,645 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 11:56:18,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 11:56:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:56:18,646 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-09-07 11:56:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:18,710 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-09-07 11:56:18,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 11:56:18,712 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-09-07 11:56:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:18,713 INFO L225 Difference]: With dead ends: 68 [2019-09-07 11:56:18,713 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 11:56:18,714 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:56:18,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 11:56:18,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-09-07 11:56:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 11:56:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-07 11:56:18,730 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-09-07 11:56:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:18,731 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-07 11:56:18,731 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 11:56:18,731 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-07 11:56:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-07 11:56:18,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:18,734 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:18,735 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1570482089, now seen corresponding path program 6 times [2019-09-07 11:56:18,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:18,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:18,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:18,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:18,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-09-07 11:56:18,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:18,851 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 11:56:18,869 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:56:18,937 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 11:56:18,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:18,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:56:18,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-09-07 11:56:19,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:19,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-07 11:56:19,017 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:56:19,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:56:19,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:56:19,018 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 11 states. [2019-09-07 11:56:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:19,082 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-09-07 11:56:19,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:56:19,082 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-09-07 11:56:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:19,083 INFO L225 Difference]: With dead ends: 77 [2019-09-07 11:56:19,083 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 11:56:19,084 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:56:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 11:56:19,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 11:56:19,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 11:56:19,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-07 11:56:19,090 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-09-07 11:56:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:19,090 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-07 11:56:19,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:56:19,091 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-07 11:56:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 11:56:19,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:19,092 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:19,092 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:19,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash 819062423, now seen corresponding path program 7 times [2019-09-07 11:56:19,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:19,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:19,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:19,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:19,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-07 11:56:19,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:19,172 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 11:56:19,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:19,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:56:19,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-09-07 11:56:19,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:19,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-09-07 11:56:19,350 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:56:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:56:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:56:19,351 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-09-07 11:56:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:19,426 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2019-09-07 11:56:19,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 11:56:19,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-09-07 11:56:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:19,428 INFO L225 Difference]: With dead ends: 83 [2019-09-07 11:56:19,428 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 11:56:19,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:56:19,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 11:56:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-09-07 11:56:19,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 11:56:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-07 11:56:19,445 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-09-07 11:56:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:19,445 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-07 11:56:19,445 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:56:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-07 11:56:19,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 11:56:19,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:19,450 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:19,451 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:19,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:19,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1604641545, now seen corresponding path program 8 times [2019-09-07 11:56:19,451 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:19,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:19,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:19,452 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:19,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-09-07 11:56:19,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:19,554 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 11:56:19,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:19,620 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:56:19,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:19,622 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:56:19,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-09-07 11:56:19,754 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:19,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-09-07 11:56:19,755 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 11:56:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 11:56:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:56:19,756 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 14 states. [2019-09-07 11:56:19,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:19,829 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2019-09-07 11:56:19,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 11:56:19,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2019-09-07 11:56:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:19,832 INFO L225 Difference]: With dead ends: 89 [2019-09-07 11:56:19,832 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 11:56:19,833 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:56:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 11:56:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-09-07 11:56:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 11:56:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-09-07 11:56:19,842 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 76 [2019-09-07 11:56:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:19,842 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-09-07 11:56:19,843 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 11:56:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-09-07 11:56:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 11:56:19,844 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:19,844 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:19,844 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash 973568599, now seen corresponding path program 9 times [2019-09-07 11:56:19,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:19,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:19,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:19,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:19,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-09-07 11:56:19,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:19,933 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 11:56:19,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:56:20,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 11:56:20,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:20,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:56:20,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-07 11:56:20,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:20,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-07 11:56:20,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 11:56:20,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 11:56:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:56:20,118 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2019-09-07 11:56:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:20,184 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-09-07 11:56:20,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 11:56:20,185 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-09-07 11:56:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:20,186 INFO L225 Difference]: With dead ends: 94 [2019-09-07 11:56:20,186 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 11:56:20,187 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:56:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 11:56:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-07 11:56:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 11:56:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-07 11:56:20,203 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-09-07 11:56:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:20,203 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-07 11:56:20,203 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 11:56:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-07 11:56:20,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 11:56:20,204 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:20,204 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:20,205 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:20,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:20,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1396192077, now seen corresponding path program 10 times [2019-09-07 11:56:20,205 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:20,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:20,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:20,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:20,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-07 11:56:20,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:20,307 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:20,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:20,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:56:20,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:20,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:56:20,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 128 proven. 25 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-09-07 11:56:20,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:20,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-07 11:56:20,489 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:56:20,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:56:20,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:56:20,490 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 16 states. [2019-09-07 11:56:20,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:20,566 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-07 11:56:20,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:56:20,568 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-07 11:56:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:20,569 INFO L225 Difference]: With dead ends: 103 [2019-09-07 11:56:20,569 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 11:56:20,572 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:56:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 11:56:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2019-09-07 11:56:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 11:56:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-09-07 11:56:20,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2019-09-07 11:56:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:20,603 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-09-07 11:56:20,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:56:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-09-07 11:56:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 11:56:20,605 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:20,605 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:20,605 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:20,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash 282000627, now seen corresponding path program 11 times [2019-09-07 11:56:20,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:20,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:20,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:20,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:20,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-09-07 11:56:20,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:20,701 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) [2019-09-07 11:56:20,728 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:21,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 11:56:21,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:21,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:56:21,132 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-09-07 11:56:21,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:21,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-07 11:56:21,226 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:56:21,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:56:21,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:56:21,227 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 16 states. [2019-09-07 11:56:21,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:21,302 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-09-07 11:56:21,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:56:21,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2019-09-07 11:56:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:21,304 INFO L225 Difference]: With dead ends: 108 [2019-09-07 11:56:21,304 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 11:56:21,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:56:21,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 11:56:21,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-09-07 11:56:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 11:56:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-09-07 11:56:21,311 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 96 [2019-09-07 11:56:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:21,311 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-09-07 11:56:21,311 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:56:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-09-07 11:56:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-07 11:56:21,313 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:21,313 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:21,314 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1022205361, now seen corresponding path program 12 times [2019-09-07 11:56:21,314 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:21,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:21,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:21,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:21,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-09-07 11:56:21,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:21,432 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) [2019-09-07 11:56:21,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:21,673 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 11:56:21,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:21,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 11:56:21,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 232 proven. 49 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 11:56:21,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:21,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-07 11:56:21,827 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 11:56:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 11:56:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:56:21,829 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 19 states. [2019-09-07 11:56:21,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:21,930 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2019-09-07 11:56:21,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 11:56:21,931 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-09-07 11:56:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:21,932 INFO L225 Difference]: With dead ends: 117 [2019-09-07 11:56:21,932 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 11:56:21,933 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:56:21,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 11:56:21,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-07 11:56:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 11:56:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-07 11:56:21,939 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 104 [2019-09-07 11:56:21,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:21,939 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-07 11:56:21,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 11:56:21,939 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-07 11:56:21,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 11:56:21,941 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:21,941 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:21,941 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -774797169, now seen corresponding path program 13 times [2019-09-07 11:56:21,942 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:21,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:21,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:21,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:21,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 11:56:22,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:22,092 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:22,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:22,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:56:22,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-09-07 11:56:22,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:22,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-07 11:56:22,374 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 11:56:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 11:56:22,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:56:22,375 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-07 11:56:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:22,500 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-09-07 11:56:22,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 11:56:22,501 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2019-09-07 11:56:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:22,502 INFO L225 Difference]: With dead ends: 123 [2019-09-07 11:56:22,502 INFO L226 Difference]: Without dead ends: 77 [2019-09-07 11:56:22,503 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:56:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-07 11:56:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-09-07 11:56:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 11:56:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-09-07 11:56:22,514 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 112 [2019-09-07 11:56:22,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:22,516 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-09-07 11:56:22,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 11:56:22,516 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-09-07 11:56:22,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 11:56:22,519 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:22,519 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:22,519 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:22,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:22,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2054076143, now seen corresponding path program 14 times [2019-09-07 11:56:22,520 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:22,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:22,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:22,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:22,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:22,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-07 11:56:22,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:22,712 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 11:56:22,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:22,788 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:56:22,788 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:22,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 11:56:22,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-07 11:56:22,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:22,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-09-07 11:56:22,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 11:56:22,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 11:56:22,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 11:56:22,981 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 22 states. [2019-09-07 11:56:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:23,059 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-09-07 11:56:23,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 11:56:23,060 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-09-07 11:56:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:23,061 INFO L225 Difference]: With dead ends: 129 [2019-09-07 11:56:23,061 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 11:56:23,062 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 11:56:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 11:56:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-09-07 11:56:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 11:56:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-09-07 11:56:23,067 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 116 [2019-09-07 11:56:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:23,067 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-09-07 11:56:23,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 11:56:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-09-07 11:56:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 11:56:23,069 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:23,069 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:23,069 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:23,069 INFO L82 PathProgramCache]: Analyzing trace with hash 530975823, now seen corresponding path program 15 times [2019-09-07 11:56:23,070 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:23,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:23,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:23,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:23,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-07 11:56:23,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:23,211 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:56:23,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:56:23,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 11:56:23,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:23,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:56:23,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-09-07 11:56:23,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:23,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-09-07 11:56:23,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 11:56:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 11:56:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:56:23,476 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 21 states. [2019-09-07 11:56:23,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:23,556 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2019-09-07 11:56:23,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 11:56:23,557 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2019-09-07 11:56:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:23,558 INFO L225 Difference]: With dead ends: 134 [2019-09-07 11:56:23,558 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 11:56:23,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:56:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 11:56:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-07 11:56:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 11:56:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-09-07 11:56:23,564 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 120 [2019-09-07 11:56:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:23,564 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-09-07 11:56:23,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 11:56:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-09-07 11:56:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 11:56:23,565 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:23,565 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:23,566 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash -539458901, now seen corresponding path program 16 times [2019-09-07 11:56:23,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:23,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:23,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:23,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:23,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 11:56:23,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:23,747 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 11:56:23,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:56:23,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:56:23,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:23,870 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 11:56:23,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 11:56:23,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:23,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 11:56:23,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 11:56:23,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 11:56:23,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:56:23,968 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 15 states. [2019-09-07 11:56:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:24,011 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-09-07 11:56:24,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 11:56:24,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2019-09-07 11:56:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:24,012 INFO L225 Difference]: With dead ends: 140 [2019-09-07 11:56:24,012 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 11:56:24,013 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:56:24,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 11:56:24,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-09-07 11:56:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-07 11:56:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2019-09-07 11:56:24,022 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 128 [2019-09-07 11:56:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:24,022 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2019-09-07 11:56:24,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 11:56:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2019-09-07 11:56:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 11:56:24,023 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:24,024 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:24,024 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:24,024 INFO L82 PathProgramCache]: Analyzing trace with hash -794441459, now seen corresponding path program 17 times [2019-09-07 11:56:24,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:24,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:24,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:24,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:24,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-09-07 11:56:24,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:24,207 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 11:56:24,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:56:25,123 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 11:56:25,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:25,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:56:25,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:56:25,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:25,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-07 11:56:25,284 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 11:56:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 11:56:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:56:25,285 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 23 states. [2019-09-07 11:56:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:25,389 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-09-07 11:56:25,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 11:56:25,389 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2019-09-07 11:56:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:25,390 INFO L225 Difference]: With dead ends: 144 [2019-09-07 11:56:25,390 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 11:56:25,391 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:56:25,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 11:56:25,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-09-07 11:56:25,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 11:56:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-07 11:56:25,396 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 130 [2019-09-07 11:56:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:25,396 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-07 11:56:25,396 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 11:56:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-07 11:56:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 11:56:25,397 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:25,398 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:25,398 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash 493676649, now seen corresponding path program 18 times [2019-09-07 11:56:25,398 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:25,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:25,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:25,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:25,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2019-09-07 11:56:25,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:25,565 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 11:56:25,580 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:56:25,891 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 11:56:25,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:25,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 11:56:25,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 448 proven. 100 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [2019-09-07 11:56:26,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:26,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-09-07 11:56:26,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 11:56:26,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 11:56:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:56:26,098 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 26 states. [2019-09-07 11:56:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:26,202 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2019-09-07 11:56:26,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:56:26,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 138 [2019-09-07 11:56:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:26,203 INFO L225 Difference]: With dead ends: 153 [2019-09-07 11:56:26,203 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 11:56:26,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:56:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 11:56:26,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-07 11:56:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 11:56:26,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-09-07 11:56:26,209 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 138 [2019-09-07 11:56:26,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:26,209 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-09-07 11:56:26,210 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 11:56:26,210 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-09-07 11:56:26,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 11:56:26,211 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:26,211 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 13, 13, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:26,211 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1179904343, now seen corresponding path program 19 times [2019-09-07 11:56:26,212 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:26,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:26,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:26,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:26,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2019-09-07 11:56:26,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:26,394 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) [2019-09-07 11:56:26,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:26,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 11:56:26,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2019-09-07 11:56:26,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:26,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-09-07 11:56:26,711 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 11:56:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 11:56:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:56:26,712 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 28 states. [2019-09-07 11:56:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:26,896 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2019-09-07 11:56:26,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 11:56:26,897 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2019-09-07 11:56:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:26,898 INFO L225 Difference]: With dead ends: 159 [2019-09-07 11:56:26,899 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 11:56:26,900 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:56:26,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 11:56:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-09-07 11:56:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 11:56:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-09-07 11:56:26,906 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 146 [2019-09-07 11:56:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:26,907 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-09-07 11:56:26,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 11:56:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-09-07 11:56:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 11:56:26,908 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:26,908 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:26,908 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:26,909 INFO L82 PathProgramCache]: Analyzing trace with hash -532519415, now seen corresponding path program 20 times [2019-09-07 11:56:26,909 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:26,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:26,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:26,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:26,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2019-09-07 11:56:27,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:27,122 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) [2019-09-07 11:56:27,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:27,223 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:56:27,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:27,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 11:56:27,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2019-09-07 11:56:27,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:27,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2019-09-07 11:56:27,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 11:56:27,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 11:56:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:56:27,513 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 30 states. [2019-09-07 11:56:27,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:27,648 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-09-07 11:56:27,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 11:56:27,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 150 [2019-09-07 11:56:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:27,650 INFO L225 Difference]: With dead ends: 165 [2019-09-07 11:56:27,650 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 11:56:27,651 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:56:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 11:56:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-09-07 11:56:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 11:56:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-07 11:56:27,656 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 150 [2019-09-07 11:56:27,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:27,657 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-07 11:56:27,657 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 11:56:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-07 11:56:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-07 11:56:27,658 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:27,658 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:27,658 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash -169943959, now seen corresponding path program 21 times [2019-09-07 11:56:27,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:27,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:27,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:27,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:27,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 11:56:27,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:27,849 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:56:27,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:28,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 11:56:28,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:28,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 11:56:28,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 536 proven. 121 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-09-07 11:56:28,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:28,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-09-07 11:56:28,431 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 11:56:28,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 11:56:28,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:56:28,432 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 28 states. [2019-09-07 11:56:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:28,538 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2019-09-07 11:56:28,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 11:56:28,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-07 11:56:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:28,539 INFO L225 Difference]: With dead ends: 170 [2019-09-07 11:56:28,540 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 11:56:28,541 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:56:28,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 11:56:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-09-07 11:56:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-07 11:56:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-09-07 11:56:28,547 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 154 [2019-09-07 11:56:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:28,548 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-09-07 11:56:28,548 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 11:56:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-09-07 11:56:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 11:56:28,549 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:28,549 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:28,550 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:28,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:28,550 INFO L82 PathProgramCache]: Analyzing trace with hash -177664827, now seen corresponding path program 22 times [2019-09-07 11:56:28,550 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:28,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:28,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:28,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:28,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2019-09-07 11:56:28,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:28,828 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 11:56:28,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:56:28,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:56:28,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:28,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 11:56:28,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 632 proven. 144 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (24)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:56:29,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:29,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-07 11:56:29,297 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 11:56:29,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 11:56:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:56:29,298 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 31 states. [2019-09-07 11:56:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:29,467 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2019-09-07 11:56:29,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:56:29,467 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2019-09-07 11:56:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:29,469 INFO L225 Difference]: With dead ends: 179 [2019-09-07 11:56:29,469 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 11:56:29,470 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:56:29,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 11:56:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-09-07 11:56:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-07 11:56:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-09-07 11:56:29,476 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 162 [2019-09-07 11:56:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:29,476 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-09-07 11:56:29,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 11:56:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-09-07 11:56:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-07 11:56:29,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:29,478 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:29,478 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:29,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1043356933, now seen corresponding path program 23 times [2019-09-07 11:56:29,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:29,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:29,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:29,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:29,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2019-09-07 11:56:29,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:29,732 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) [2019-09-07 11:56:29,746 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:41,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-07 11:56:41,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:41,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 11:56:41,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 732 proven. 169 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2019-09-07 11:56:41,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:41,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-09-07 11:56:41,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 11:56:41,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 11:56:41,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:56:41,609 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 31 states. [2019-09-07 11:56:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:41,758 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2019-09-07 11:56:41,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:56:41,758 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 170 [2019-09-07 11:56:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:41,759 INFO L225 Difference]: With dead ends: 184 [2019-09-07 11:56:41,759 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 11:56:41,760 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:56:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 11:56:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-09-07 11:56:41,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 11:56:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-09-07 11:56:41,769 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 170 [2019-09-07 11:56:41,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:41,769 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-09-07 11:56:41,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 11:56:41,770 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-09-07 11:56:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-09-07 11:56:41,771 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:41,771 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 16, 16, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:41,771 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1183490145, now seen corresponding path program 24 times [2019-09-07 11:56:41,773 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:41,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:41,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:41,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:41,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2019-09-07 11:56:42,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:42,036 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 11:56:42,049 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:56:42,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-07 11:56:42,933 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:42,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 11:56:42,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2019-09-07 11:56:43,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:43,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2019-09-07 11:56:43,324 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 11:56:43,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 11:56:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 11:56:43,326 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 34 states. [2019-09-07 11:56:43,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:43,457 INFO L93 Difference]: Finished difference Result 193 states and 205 transitions. [2019-09-07 11:56:43,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 11:56:43,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 178 [2019-09-07 11:56:43,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:43,459 INFO L225 Difference]: With dead ends: 193 [2019-09-07 11:56:43,459 INFO L226 Difference]: Without dead ends: 119 [2019-09-07 11:56:43,460 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 11:56:43,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-07 11:56:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-09-07 11:56:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-07 11:56:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-09-07 11:56:43,465 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 178 [2019-09-07 11:56:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:43,465 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-09-07 11:56:43,465 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 11:56:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-09-07 11:56:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 11:56:43,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:43,467 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 17, 17, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:43,467 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:43,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2090821281, now seen corresponding path program 25 times [2019-09-07 11:56:43,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:43,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:43,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:43,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:43,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2419 trivial. 0 not checked. [2019-09-07 11:56:43,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:43,722 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 11:56:43,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:43,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 11:56:43,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:56:44,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:44,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2019-09-07 11:56:44,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 11:56:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 11:56:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:56:44,208 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 36 states. [2019-09-07 11:56:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:44,338 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2019-09-07 11:56:44,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 11:56:44,338 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 186 [2019-09-07 11:56:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:44,340 INFO L225 Difference]: With dead ends: 199 [2019-09-07 11:56:44,340 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 11:56:44,342 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:56:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 11:56:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-09-07 11:56:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 11:56:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-09-07 11:56:44,347 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 186 [2019-09-07 11:56:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:44,347 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-09-07 11:56:44,347 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 11:56:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-09-07 11:56:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-07 11:56:44,348 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:44,349 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:44,349 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1152209407, now seen corresponding path program 26 times [2019-09-07 11:56:44,349 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:44,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:44,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:44,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:56:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2454 trivial. 0 not checked. [2019-09-07 11:56:44,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:44,654 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) [2019-09-07 11:56:44,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:56:44,771 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:56:44,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:44,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 11:56:44,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2019-09-07 11:56:45,167 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:45,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2019-09-07 11:56:45,168 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 11:56:45,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 11:56:45,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:56:45,169 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 38 states. [2019-09-07 11:56:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:45,325 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2019-09-07 11:56:45,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 11:56:45,326 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 190 [2019-09-07 11:56:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:45,327 INFO L225 Difference]: With dead ends: 205 [2019-09-07 11:56:45,327 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 11:56:45,328 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:56:45,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 11:56:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-09-07 11:56:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 11:56:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2019-09-07 11:56:45,334 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 190 [2019-09-07 11:56:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:45,334 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2019-09-07 11:56:45,334 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 11:56:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2019-09-07 11:56:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-07 11:56:45,336 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:45,336 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 19, 19, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:45,336 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1057168481, now seen corresponding path program 27 times [2019-09-07 11:56:45,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:45,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:45,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:45,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:45,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2019-09-07 11:56:45,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:45,620 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 11:56:45,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 11:56:47,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 11:56:47,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:47,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 11:56:47,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2019-09-07 11:56:47,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:47,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-09-07 11:56:47,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 11:56:47,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 11:56:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:56:47,526 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 36 states. [2019-09-07 11:56:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:47,661 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2019-09-07 11:56:47,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 11:56:47,662 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 194 [2019-09-07 11:56:47,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:47,663 INFO L225 Difference]: With dead ends: 210 [2019-09-07 11:56:47,663 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 11:56:47,664 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:56:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 11:56:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2019-09-07 11:56:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-07 11:56:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-09-07 11:56:47,669 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 194 [2019-09-07 11:56:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:47,669 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-09-07 11:56:47,670 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 11:56:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-09-07 11:56:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-09-07 11:56:47,670 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:47,671 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:47,671 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:47,671 INFO L82 PathProgramCache]: Analyzing trace with hash -951881539, now seen corresponding path program 28 times [2019-09-07 11:56:47,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:47,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:47,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:47,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:47,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 11:56:47,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:47,992 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 11:56:48,003 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:56:48,098 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:56:48,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:56:48,101 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 11:56:48,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:56:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 11:56:48,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:56:48,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 11:56:48,146 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 11:56:48,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 11:56:48,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:56:48,147 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 23 states. [2019-09-07 11:56:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:56:48,236 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-09-07 11:56:48,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 11:56:48,236 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 202 [2019-09-07 11:56:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:56:48,237 INFO L225 Difference]: With dead ends: 216 [2019-09-07 11:56:48,237 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 11:56:48,240 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:56:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 11:56:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-09-07 11:56:48,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 11:56:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2019-09-07 11:56:48,254 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 202 [2019-09-07 11:56:48,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:56:48,255 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2019-09-07 11:56:48,255 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 11:56:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2019-09-07 11:56:48,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-07 11:56:48,256 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:56:48,257 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:56:48,257 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:56:48,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:56:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1546491039, now seen corresponding path program 29 times [2019-09-07 11:56:48,258 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:56:48,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:56:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:48,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:56:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:56:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:56:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2019-09-07 11:56:48,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:56:48,544 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 11:56:48,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:57:19,286 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-07 11:57:19,286 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:57:19,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 11:57:19,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 1092 proven. 256 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2019-09-07 11:57:19,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:19,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2019-09-07 11:57:19,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 11:57:19,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 11:57:19,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:57:19,789 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 38 states. [2019-09-07 11:57:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:57:20,002 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2019-09-07 11:57:20,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 11:57:20,003 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 204 [2019-09-07 11:57:20,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:57:20,004 INFO L225 Difference]: With dead ends: 220 [2019-09-07 11:57:20,004 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 11:57:20,006 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:57:20,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 11:57:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-09-07 11:57:20,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 11:57:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2019-09-07 11:57:20,013 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 204 [2019-09-07 11:57:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:57:20,014 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2019-09-07 11:57:20,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 11:57:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2019-09-07 11:57:20,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-07 11:57:20,017 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:57:20,017 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:57:20,017 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:57:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:57:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1005818363, now seen corresponding path program 30 times [2019-09-07 11:57:20,018 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:57:20,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:57:20,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:20,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:57:20,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3079 trivial. 0 not checked. [2019-09-07 11:57:20,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:57:20,375 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 11:57:20,388 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:57:23,507 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-07 11:57:23,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:57:23,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 11:57:23,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:23,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 1232 proven. 289 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2019-09-07 11:57:23,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:23,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-09-07 11:57:23,878 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 11:57:23,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 11:57:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 11:57:23,879 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 41 states. [2019-09-07 11:57:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:57:24,034 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2019-09-07 11:57:24,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 11:57:24,035 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 212 [2019-09-07 11:57:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:57:24,036 INFO L225 Difference]: With dead ends: 229 [2019-09-07 11:57:24,036 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 11:57:24,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 11:57:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 11:57:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2019-09-07 11:57:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 11:57:24,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2019-09-07 11:57:24,042 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 212 [2019-09-07 11:57:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:57:24,043 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2019-09-07 11:57:24,043 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 11:57:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2019-09-07 11:57:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-07 11:57:24,044 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:57:24,044 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 21, 21, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:57:24,045 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:57:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:57:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash 392683579, now seen corresponding path program 31 times [2019-09-07 11:57:24,045 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:57:24,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:57:24,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:24,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:57:24,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 11:57:24,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:57:24,393 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 11:57:24,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:57:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:24,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 11:57:24,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3400 trivial. 0 not checked. [2019-09-07 11:57:24,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:24,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2019-09-07 11:57:24,941 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 11:57:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 11:57:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 11:57:24,943 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 44 states. [2019-09-07 11:57:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:57:25,128 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2019-09-07 11:57:25,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 11:57:25,133 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 220 [2019-09-07 11:57:25,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:57:25,135 INFO L225 Difference]: With dead ends: 235 [2019-09-07 11:57:25,135 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 11:57:25,137 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 11:57:25,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 11:57:25,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2019-09-07 11:57:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 11:57:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-09-07 11:57:25,143 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 220 [2019-09-07 11:57:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:57:25,144 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-09-07 11:57:25,144 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 11:57:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-09-07 11:57:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-07 11:57:25,145 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:57:25,146 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 22, 22, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:57:25,146 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:57:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:57:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1874458469, now seen corresponding path program 32 times [2019-09-07 11:57:25,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:57:25,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:57:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:25,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:57:25,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2019-09-07 11:57:25,544 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:57:25,544 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 11:57:25,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:57:25,656 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:57:25,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:57:25,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 11:57:25,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3439 trivial. 0 not checked. [2019-09-07 11:57:26,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:26,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-09-07 11:57:26,116 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 11:57:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 11:57:26,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 11:57:26,117 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 46 states. [2019-09-07 11:57:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:57:26,286 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2019-09-07 11:57:26,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-07 11:57:26,286 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 224 [2019-09-07 11:57:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:57:26,287 INFO L225 Difference]: With dead ends: 241 [2019-09-07 11:57:26,287 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 11:57:26,289 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 11:57:26,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 11:57:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2019-09-07 11:57:26,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 11:57:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2019-09-07 11:57:26,294 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 224 [2019-09-07 11:57:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:57:26,294 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2019-09-07 11:57:26,294 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 11:57:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2019-09-07 11:57:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 11:57:26,296 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:57:26,296 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 23, 23, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:57:26,296 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:57:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:57:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1983031301, now seen corresponding path program 33 times [2019-09-07 11:57:26,297 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:57:26,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:57:26,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:26,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:57:26,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2019-09-07 11:57:26,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:57:26,682 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:57:26,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:57:29,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-07 11:57:29,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:57:29,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 11:57:29,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 1376 proven. 324 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2019-09-07 11:57:29,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:29,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-09-07 11:57:29,588 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 11:57:29,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 11:57:29,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 11:57:29,589 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 43 states. [2019-09-07 11:57:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:57:29,780 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2019-09-07 11:57:29,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 11:57:29,781 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 228 [2019-09-07 11:57:29,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:57:29,782 INFO L225 Difference]: With dead ends: 246 [2019-09-07 11:57:29,782 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 11:57:29,783 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 11:57:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 11:57:29,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-09-07 11:57:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 11:57:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2019-09-07 11:57:29,789 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 228 [2019-09-07 11:57:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:57:29,790 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2019-09-07 11:57:29,790 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 11:57:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2019-09-07 11:57:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-07 11:57:29,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:57:29,792 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 23, 23, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:57:29,792 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:57:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:57:29,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1041406377, now seen corresponding path program 34 times [2019-09-07 11:57:29,792 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:57:29,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:57:29,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:29,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:57:29,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [2019-09-07 11:57:30,195 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:57:30,195 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:57:30,241 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:57:30,363 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:57:30,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:57:30,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 11:57:30,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:57:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (36)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:57:30,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:57:30,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 11:57:30,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 11:57:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 11:57:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 11:57:30,446 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand 27 states. [2019-09-07 11:57:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:57:30,537 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2019-09-07 11:57:30,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:57:30,539 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2019-09-07 11:57:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:57:30,541 INFO L225 Difference]: With dead ends: 252 [2019-09-07 11:57:30,541 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 11:57:30,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 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 11:57:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 11:57:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-09-07 11:57:30,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-07 11:57:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2019-09-07 11:57:30,548 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 236 [2019-09-07 11:57:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:57:30,549 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2019-09-07 11:57:30,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 11:57:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2019-09-07 11:57:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-07 11:57:30,550 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:57:30,551 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 24, 24, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:57:30,551 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:57:30,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:57:30,551 INFO L82 PathProgramCache]: Analyzing trace with hash 166203833, now seen corresponding path program 35 times [2019-09-07 11:57:30,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:57:30,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:57:30,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:30,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:57:30,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:57:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:57:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2019-09-07 11:57:31,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:57:31,078 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:57:31,102 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:59:06,621 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-07 11:59:06,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:06,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 11:59:06,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 1524 proven. 361 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2019-09-07 11:59:07,090 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:07,090 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-09-07 11:59:07,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 11:59:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 11:59:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 11:59:07,092 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 45 states. [2019-09-07 11:59:07,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:07,240 INFO L93 Difference]: Finished difference Result 256 states and 267 transitions. [2019-09-07 11:59:07,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 11:59:07,241 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 238 [2019-09-07 11:59:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:07,242 INFO L225 Difference]: With dead ends: 256 [2019-09-07 11:59:07,242 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 11:59:07,243 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 11:59:07,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 11:59:07,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2019-09-07 11:59:07,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 11:59:07,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2019-09-07 11:59:07,248 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 238 [2019-09-07 11:59:07,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:07,248 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2019-09-07 11:59:07,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 11:59:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2019-09-07 11:59:07,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-07 11:59:07,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:07,250 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 24, 24, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:07,250 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1921922795, now seen corresponding path program 36 times [2019-09-07 11:59:07,251 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:07,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:07,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:07,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:07,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4264 trivial. 0 not checked. [2019-09-07 11:59:07,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:07,633 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:07,644 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:59:15,208 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2019-09-07 11:59:15,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:15,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 11:59:15,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 1688 proven. 400 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (38)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:59:15,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:15,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2019-09-07 11:59:15,644 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-07 11:59:15,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-07 11:59:15,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 11:59:15,646 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 48 states. [2019-09-07 11:59:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:15,829 INFO L93 Difference]: Finished difference Result 265 states and 277 transitions. [2019-09-07 11:59:15,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-07 11:59:15,830 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 246 [2019-09-07 11:59:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:15,831 INFO L225 Difference]: With dead ends: 265 [2019-09-07 11:59:15,831 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 11:59:15,833 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 11:59:15,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 11:59:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-09-07 11:59:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 11:59:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2019-09-07 11:59:15,838 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 246 [2019-09-07 11:59:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:15,838 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2019-09-07 11:59:15,839 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-07 11:59:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2019-09-07 11:59:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-07 11:59:15,841 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:15,841 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 25, 25, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:15,841 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:15,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:15,842 INFO L82 PathProgramCache]: Analyzing trace with hash 901848917, now seen corresponding path program 37 times [2019-09-07 11:59:15,842 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:15,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:15,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:15,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:15,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4735 trivial. 0 not checked. [2019-09-07 11:59:16,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:16,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:16,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:59:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:16,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 11:59:16,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4639 trivial. 0 not checked. [2019-09-07 11:59:16,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:16,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2019-09-07 11:59:16,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-07 11:59:16,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-07 11:59:16,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 11:59:16,982 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand 52 states. [2019-09-07 11:59:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:17,216 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2019-09-07 11:59:17,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-07 11:59:17,216 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 254 [2019-09-07 11:59:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:17,218 INFO L225 Difference]: With dead ends: 271 [2019-09-07 11:59:17,218 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 11:59:17,219 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 11:59:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 11:59:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-09-07 11:59:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-09-07 11:59:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2019-09-07 11:59:17,225 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 254 [2019-09-07 11:59:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:17,225 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2019-09-07 11:59:17,225 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-07 11:59:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2019-09-07 11:59:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-07 11:59:17,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:17,227 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 26, 26, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:17,227 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1981474997, now seen corresponding path program 38 times [2019-09-07 11:59:17,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:17,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:17,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:17,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:59:17,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2019-09-07 11:59:17,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:17,636 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:17,647 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:59:17,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:59:17,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:17,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 11:59:17,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2019-09-07 11:59:18,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:18,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2019-09-07 11:59:18,799 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 11:59:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 11:59:18,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 11:59:18,801 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 54 states. [2019-09-07 11:59:19,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:19,027 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2019-09-07 11:59:19,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 11:59:19,028 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2019-09-07 11:59:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:19,029 INFO L225 Difference]: With dead ends: 277 [2019-09-07 11:59:19,029 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 11:59:19,030 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 11:59:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 11:59:19,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2019-09-07 11:59:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-07 11:59:19,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2019-09-07 11:59:19,035 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 258 [2019-09-07 11:59:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:19,036 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2019-09-07 11:59:19,036 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 11:59:19,036 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2019-09-07 11:59:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-09-07 11:59:19,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:19,038 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 27, 27, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:19,038 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:19,039 INFO L82 PathProgramCache]: Analyzing trace with hash -645277419, now seen corresponding path program 39 times [2019-09-07 11:59:19,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:19,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:19,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4839 trivial. 0 not checked. [2019-09-07 11:59:19,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:19,690 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:59:19,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:25,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 11:59:25,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:25,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 11:59:25,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 1856 proven. 441 refuted. 0 times theorem prover too weak. 3167 trivial. 0 not checked. [2019-09-07 11:59:25,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:25,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2019-09-07 11:59:25,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-07 11:59:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-07 11:59:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 11:59:25,921 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 50 states. [2019-09-07 11:59:26,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:26,127 INFO L93 Difference]: Finished difference Result 282 states and 293 transitions. [2019-09-07 11:59:26,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-07 11:59:26,128 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 262 [2019-09-07 11:59:26,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:26,129 INFO L225 Difference]: With dead ends: 282 [2019-09-07 11:59:26,129 INFO L226 Difference]: Without dead ends: 175 [2019-09-07 11:59:26,131 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 11:59:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-09-07 11:59:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-09-07 11:59:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-09-07 11:59:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2019-09-07 11:59:26,141 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 262 [2019-09-07 11:59:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:26,142 INFO L475 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2019-09-07 11:59:26,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-07 11:59:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2019-09-07 11:59:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-07 11:59:26,144 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:26,145 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 27, 27, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:26,145 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:26,146 INFO L82 PathProgramCache]: Analyzing trace with hash -637427343, now seen corresponding path program 40 times [2019-09-07 11:59:26,146 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:26,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:26,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:26,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:26,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2019-09-07 11:59:26,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:26,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:26,683 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:59:26,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:59:26,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:26,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 11:59:26,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 2032 proven. 484 refuted. 0 times theorem prover too weak. 3392 trivial. 0 not checked. [2019-09-07 11:59:27,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:27,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 53 [2019-09-07 11:59:27,312 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 11:59:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 11:59:27,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 11:59:27,313 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 53 states. [2019-09-07 11:59:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:27,553 INFO L93 Difference]: Finished difference Result 291 states and 303 transitions. [2019-09-07 11:59:27,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 11:59:27,559 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 270 [2019-09-07 11:59:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:27,561 INFO L225 Difference]: With dead ends: 291 [2019-09-07 11:59:27,561 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 11:59:27,563 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 11:59:27,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 11:59:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2019-09-07 11:59:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 11:59:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2019-09-07 11:59:27,575 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 270 [2019-09-07 11:59:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:27,576 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2019-09-07 11:59:27,576 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 11:59:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2019-09-07 11:59:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-09-07 11:59:27,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:27,578 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 28, 28, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:27,578 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1719002703, now seen corresponding path program 41 times [2019-09-07 11:59:27,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:27,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:27,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:27,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:27,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5698 trivial. 0 not checked. [2019-09-07 11:59:28,040 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:28,040 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:28,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:01:35,199 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2019-09-07 12:01:35,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:35,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:01:35,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 2212 proven. 529 refuted. 0 times theorem prover too weak. 3633 trivial. 0 not checked. [2019-09-07 12:01:35,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:35,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2019-09-07 12:01:35,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:01:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:01:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:01:35,791 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 53 states. [2019-09-07 12:01:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:36,030 INFO L93 Difference]: Finished difference Result 296 states and 307 transitions. [2019-09-07 12:01:36,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:01:36,030 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 278 [2019-09-07 12:01:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:36,031 INFO L225 Difference]: With dead ends: 296 [2019-09-07 12:01:36,032 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 12:01:36,033 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:01:36,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 12:01:36,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2019-09-07 12:01:36,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 12:01:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2019-09-07 12:01:36,040 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 278 [2019-09-07 12:01:36,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:36,040 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2019-09-07 12:01:36,040 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:01:36,041 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2019-09-07 12:01:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-07 12:01:36,042 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:36,043 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 28, 28, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:36,043 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash -998574835, now seen corresponding path program 42 times [2019-09-07 12:01:36,043 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:36,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:36,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:36,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:36,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6072 trivial. 0 not checked. [2019-09-07 12:01:36,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:36,651 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:36,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:01:49,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-07 12:01:49,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:49,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 12:01:49,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 2408 proven. 576 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2019-09-07 12:01:50,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:50,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2019-09-07 12:01:50,378 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 12:01:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 12:01:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:01:50,379 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 56 states. [2019-09-07 12:01:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:50,634 INFO L93 Difference]: Finished difference Result 305 states and 317 transitions. [2019-09-07 12:01:50,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-07 12:01:50,635 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 286 [2019-09-07 12:01:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:50,636 INFO L225 Difference]: With dead ends: 305 [2019-09-07 12:01:50,637 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 12:01:50,637 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:01:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 12:01:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-09-07 12:01:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-09-07 12:01:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-09-07 12:01:50,643 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 286 [2019-09-07 12:01:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:50,644 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-09-07 12:01:50,644 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 12:01:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-09-07 12:01:50,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-09-07 12:01:50,646 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:50,646 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 29, 29, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:50,646 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash 549970765, now seen corresponding path program 43 times [2019-09-07 12:01:50,647 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:50,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:50,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:50,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:50,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2019-09-07 12:01:51,128 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:51,128 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:51,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:01:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:51,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 12:01:51,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6519 trivial. 0 not checked. [2019-09-07 12:01:51,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:51,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 60 [2019-09-07 12:01:51,997 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-07 12:01:51,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-07 12:01:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:01:51,998 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 60 states. [2019-09-07 12:01:52,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:52,242 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2019-09-07 12:01:52,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-07 12:01:52,242 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 294 [2019-09-07 12:01:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:52,244 INFO L225 Difference]: With dead ends: 311 [2019-09-07 12:01:52,244 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 12:01:52,246 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:01:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 12:01:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2019-09-07 12:01:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-07 12:01:52,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2019-09-07 12:01:52,252 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 294 [2019-09-07 12:01:52,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:52,252 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2019-09-07 12:01:52,252 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-07 12:01:52,252 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2019-09-07 12:01:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-09-07 12:01:52,254 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:52,255 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 30, 30, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:52,255 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash 764978349, now seen corresponding path program 44 times [2019-09-07 12:01:52,256 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:52,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:52,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:52,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:01:52,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6690 trivial. 0 not checked. [2019-09-07 12:01:52,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:52,777 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:52,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:01:52,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:01:52,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:52,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:01:52,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6574 trivial. 0 not checked. [2019-09-07 12:01:53,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:53,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 62 [2019-09-07 12:01:53,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:01:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:01:53,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:01:53,833 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 62 states. [2019-09-07 12:01:54,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:54,113 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-09-07 12:01:54,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:01:54,113 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 298 [2019-09-07 12:01:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:54,114 INFO L225 Difference]: With dead ends: 317 [2019-09-07 12:01:54,115 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 12:01:54,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:01:54,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 12:01:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-09-07 12:01:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-09-07 12:01:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2019-09-07 12:01:54,122 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 298 [2019-09-07 12:01:54,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:54,122 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2019-09-07 12:01:54,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:01:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2019-09-07 12:01:54,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-09-07 12:01:54,125 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:54,125 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 31, 31, 29, 29, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:54,125 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:54,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:54,126 INFO L82 PathProgramCache]: Analyzing trace with hash -243954419, now seen corresponding path program 45 times [2019-09-07 12:01:54,126 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:54,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:54,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:54,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:54,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6751 trivial. 0 not checked. [2019-09-07 12:01:54,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:54,725 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:54,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:02:04,584 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 12:02:04,584 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:02:04,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-07 12:02:04,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:02:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 2726 proven. 625 refuted. 0 times theorem prover too weak. 4241 trivial. 0 not checked. [2019-09-07 12:02:05,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:02:05,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2019-09-07 12:02:05,406 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:02:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:02:05,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=943, Invalid=2839, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:02:05,407 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 62 states. [2019-09-07 12:02:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:02:06,710 INFO L93 Difference]: Finished difference Result 323 states and 335 transitions. [2019-09-07 12:02:06,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:02:06,711 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 302 [2019-09-07 12:02:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:02:06,712 INFO L225 Difference]: With dead ends: 323 [2019-09-07 12:02:06,712 INFO L226 Difference]: Without dead ends: 200 [2019-09-07 12:02:06,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2063, Invalid=6679, Unknown=0, NotChecked=0, Total=8742 [2019-09-07 12:02:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-09-07 12:02:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2019-09-07 12:02:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-09-07 12:02:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2019-09-07 12:02:06,718 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 302 [2019-09-07 12:02:06,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:02:06,719 INFO L475 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2019-09-07 12:02:06,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:02:06,719 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2019-09-07 12:02:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-09-07 12:02:06,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:02:06,721 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 31, 31, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:02:06,721 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:02:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:02:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1240199015, now seen corresponding path program 46 times [2019-09-07 12:02:06,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:02:06,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:02:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:02:06,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:02:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:02:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:02:07,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7216 trivial. 0 not checked. [2019-09-07 12:02:07,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:02:07,776 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:02:07,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:02:08,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:02:08,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:02:08,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:02:08,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:02:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 2816 proven. 676 refuted. 0 times theorem prover too weak. 4685 trivial. 0 not checked. [2019-09-07 12:02:09,097 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:02:09,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29] total 61 [2019-09-07 12:02:09,098 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 12:02:09,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 12:02:09,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:02:09,100 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand 61 states. [2019-09-07 12:02:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:02:09,374 INFO L93 Difference]: Finished difference Result 335 states and 347 transitions. [2019-09-07 12:02:09,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 12:02:09,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 312 [2019-09-07 12:02:09,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:02:09,376 INFO L225 Difference]: With dead ends: 335 [2019-09-07 12:02:09,376 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 12:02:09,378 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:02:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 12:02:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2019-09-07 12:02:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-09-07 12:02:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 207 transitions. [2019-09-07 12:02:09,385 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 207 transitions. Word has length 312 [2019-09-07 12:02:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:02:09,385 INFO L475 AbstractCegarLoop]: Abstraction has 203 states and 207 transitions. [2019-09-07 12:02:09,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 12:02:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 207 transitions. [2019-09-07 12:02:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-09-07 12:02:09,388 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:02:09,388 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 32, 32, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:02:09,389 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:02:09,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:02:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash -649504857, now seen corresponding path program 47 times [2019-09-07 12:02:09,389 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:02:09,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:02:09,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:02:09,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:02:09,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:02:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:02:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8723 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 7699 trivial. 0 not checked. [2019-09-07 12:02:10,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:02:10,381 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:02:10,406 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:05:28,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2019-09-07 12:05:28,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:05:28,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 12:05:28,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:05:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8723 backedges. 3028 proven. 729 refuted. 0 times theorem prover too weak. 4966 trivial. 0 not checked. [2019-09-07 12:05:29,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:05:29,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 30] total 63 [2019-09-07 12:05:29,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 12:05:29,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 12:05:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:05:29,523 INFO L87 Difference]: Start difference. First operand 203 states and 207 transitions. Second operand 63 states. [2019-09-07 12:05:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:05:29,795 INFO L93 Difference]: Finished difference Result 341 states and 353 transitions. [2019-09-07 12:05:29,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 12:05:29,796 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 320 [2019-09-07 12:05:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:05:29,798 INFO L225 Difference]: With dead ends: 341 [2019-09-07 12:05:29,798 INFO L226 Difference]: Without dead ends: 209 [2019-09-07 12:05:29,800 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:05:29,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-09-07 12:05:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2019-09-07 12:05:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-09-07 12:05:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 211 transitions. [2019-09-07 12:05:29,806 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 211 transitions. Word has length 320 [2019-09-07 12:05:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:05:29,807 INFO L475 AbstractCegarLoop]: Abstraction has 207 states and 211 transitions. [2019-09-07 12:05:29,808 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 12:05:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 211 transitions. [2019-09-07 12:05:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-09-07 12:05:29,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:05:29,811 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 33, 33, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:05:29,811 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:05:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:05:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash -976171545, now seen corresponding path program 48 times [2019-09-07 12:05:29,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:05:29,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:05:29,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:29,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:05:29,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:05:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:05:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9289 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 8328 trivial. 0 not checked. [2019-09-07 12:05:30,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:05:30,390 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:05:30,402 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:06:02,434 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2019-09-07 12:06:02,435 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:02,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 12:06:02,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9289 backedges. 3256 proven. 784 refuted. 0 times theorem prover too weak. 5249 trivial. 0 not checked. [2019-09-07 12:06:03,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:03,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31] total 63 [2019-09-07 12:06:03,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-07 12:06:03,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-07 12:06:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=2881, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:06:03,213 INFO L87 Difference]: Start difference. First operand 207 states and 211 transitions. Second operand 63 states. [2019-09-07 12:06:03,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:03,509 INFO L93 Difference]: Finished difference Result 346 states and 357 transitions. [2019-09-07 12:06:03,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-07 12:06:03,516 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 328 [2019-09-07 12:06:03,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:03,517 INFO L225 Difference]: With dead ends: 346 [2019-09-07 12:06:03,517 INFO L226 Difference]: Without dead ends: 213 [2019-09-07 12:06:03,518 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1025, Invalid=2881, Unknown=0, NotChecked=0, Total=3906 [2019-09-07 12:06:03,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2019-09-07 12:06:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 211. [2019-09-07 12:06:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-09-07 12:06:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2019-09-07 12:06:03,525 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 328 [2019-09-07 12:06:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:03,525 INFO L475 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2019-09-07 12:06:03,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-07 12:06:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2019-09-07 12:06:03,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-09-07 12:06:03,527 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:03,528 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 33, 33, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:03,528 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:03,528 INFO L82 PathProgramCache]: Analyzing trace with hash 820229699, now seen corresponding path program 49 times [2019-09-07 12:06:03,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:03,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:03,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:03,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:03,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9871 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:06:04,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:04,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:04,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:04,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 12:06:04,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9871 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (51)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:06:04,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:04,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-07 12:06:04,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 12:06:04,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 12:06:04,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:06:04,431 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand 37 states. [2019-09-07 12:06:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:04,543 INFO L93 Difference]: Finished difference Result 352 states and 360 transitions. [2019-09-07 12:06:04,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 12:06:04,544 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 336 [2019-09-07 12:06:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:04,545 INFO L225 Difference]: With dead ends: 352 [2019-09-07 12:06:04,546 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 12:06:04,547 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 12:06:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 12:06:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2019-09-07 12:06:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-09-07 12:06:04,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-09-07 12:06:04,556 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 336 [2019-09-07 12:06:04,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:04,556 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-09-07 12:06:04,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 12:06:04,557 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-09-07 12:06:04,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-09-07 12:06:04,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:04,561 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 34, 34, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:04,561 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:04,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:04,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1436534949, now seen corresponding path program 50 times [2019-09-07 12:06:04,562 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:04,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:04,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:04,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:06:04,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8914 trivial. 0 not checked. [2019-09-07 12:06:05,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:05,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:06:05,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:05,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:06:05,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:05,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 12:06:05,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:06:06,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:06,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 70 [2019-09-07 12:06:06,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:06:06,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:06:06,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:06:06,978 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 70 states. [2019-09-07 12:06:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:07,287 INFO L93 Difference]: Finished difference Result 357 states and 366 transitions. [2019-09-07 12:06:07,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:06:07,290 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 338 [2019-09-07 12:06:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:07,292 INFO L225 Difference]: With dead ends: 357 [2019-09-07 12:06:07,292 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 12:06:07,293 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:06:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 12:06:07,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-09-07 12:06:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-09-07 12:06:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2019-09-07 12:06:07,300 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 338 [2019-09-07 12:06:07,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:07,301 INFO L475 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2019-09-07 12:06:07,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:06:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2019-09-07 12:06:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-07 12:06:07,303 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:07,303 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 35, 35, 33, 33, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:07,303 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1906136827, now seen corresponding path program 51 times [2019-09-07 12:06:07,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:07,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:07,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:07,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:07,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8983 trivial. 0 not checked. [2019-09-07 12:06:07,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:07,954 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:07,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:06:41,289 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 12:06:41,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:41,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 12:06:41,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:42,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 3488 proven. 841 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2019-09-07 12:06:42,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:42,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 66 [2019-09-07 12:06:42,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-07 12:06:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-07 12:06:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1125, Invalid=3165, Unknown=0, NotChecked=0, Total=4290 [2019-09-07 12:06:42,135 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 66 states. [2019-09-07 12:06:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:42,413 INFO L93 Difference]: Finished difference Result 362 states and 373 transitions. [2019-09-07 12:06:42,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-07 12:06:42,414 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 342 [2019-09-07 12:06:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:42,415 INFO L225 Difference]: With dead ends: 362 [2019-09-07 12:06:42,415 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 12:06:42,416 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=3165, Unknown=0, NotChecked=0, Total=4290 [2019-09-07 12:06:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 12:06:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2019-09-07 12:06:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-09-07 12:06:42,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2019-09-07 12:06:42,423 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 342 [2019-09-07 12:06:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:42,424 INFO L475 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2019-09-07 12:06:42,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-07 12:06:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2019-09-07 12:06:42,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2019-09-07 12:06:42,426 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:42,426 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 35, 35, 34, 34, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:42,426 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:42,427 INFO L82 PathProgramCache]: Analyzing trace with hash -819807903, now seen corresponding path program 52 times [2019-09-07 12:06:42,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:42,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:42,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:42,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:42,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10676 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9451 trivial. 0 not checked. [2019-09-07 12:06:43,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:43,218 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:43,228 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:06:43,384 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:06:43,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:06:43,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 12:06:43,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:06:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10676 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9451 trivial. 0 not checked. [2019-09-07 12:06:43,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:06:43,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-07 12:06:43,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 12:06:43,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 12:06:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:06:43,523 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand 39 states. [2019-09-07 12:06:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:06:43,656 INFO L93 Difference]: Finished difference Result 368 states and 376 transitions. [2019-09-07 12:06:43,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:06:43,657 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 350 [2019-09-07 12:06:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:06:43,658 INFO L225 Difference]: With dead ends: 368 [2019-09-07 12:06:43,658 INFO L226 Difference]: Without dead ends: 224 [2019-09-07 12:06:43,659 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:06:43,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-09-07 12:06:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-09-07 12:06:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-07 12:06:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2019-09-07 12:06:43,672 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 350 [2019-09-07 12:06:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:06:43,672 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2019-09-07 12:06:43,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 12:06:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2019-09-07 12:06:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-09-07 12:06:43,674 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:06:43,675 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 36, 36, 34, 34, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:06:43,675 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:06:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:06:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash -833226685, now seen corresponding path program 53 times [2019-09-07 12:06:43,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:06:43,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:06:43,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:43,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:06:43,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:06:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:06:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10747 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2019-09-07 12:06:44,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:06:44,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:06:44,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:10:19,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2019-09-07 12:10:19,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:10:19,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:10:19,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:10:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 10747 backedges. 3724 proven. 900 refuted. 0 times theorem prover too weak. 6123 trivial. 0 not checked. [2019-09-07 12:10:20,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:10:20,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 68 [2019-09-07 12:10:20,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-07 12:10:20,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-07 12:10:20,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=3363, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 12:10:20,468 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand 68 states. [2019-09-07 12:10:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:10:20,733 INFO L93 Difference]: Finished difference Result 372 states and 383 transitions. [2019-09-07 12:10:20,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-07 12:10:20,734 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 352 [2019-09-07 12:10:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:10:20,736 INFO L225 Difference]: With dead ends: 372 [2019-09-07 12:10:20,736 INFO L226 Difference]: Without dead ends: 229 [2019-09-07 12:10:20,737 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1193, Invalid=3363, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 12:10:20,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-09-07 12:10:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2019-09-07 12:10:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-09-07 12:10:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2019-09-07 12:10:20,743 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 352 [2019-09-07 12:10:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:10:20,743 INFO L475 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2019-09-07 12:10:20,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-07 12:10:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2019-09-07 12:10:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2019-09-07 12:10:20,746 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:10:20,746 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 36, 36, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:10:20,746 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:10:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:10:20,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1625443937, now seen corresponding path program 54 times [2019-09-07 12:10:20,747 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:10:20,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:10:20,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:20,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:10:20,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:10:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:10:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 11371 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10075 trivial. 0 not checked. [2019-09-07 12:10:21,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:10:21,510 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:10:21,521 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE