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/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 03:04:58,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 03:04:58,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 03:04:58,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 03:04:58,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 03:04:58,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 03:04:58,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 03:04:58,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-08 03:04:58,846 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 03:04:58,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 03:04:58,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 03:04:58,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 03:04:58,848 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 03:04:58,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 03:04:58,848 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 03:04:58,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 03:04:58,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 03:04:58,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 03:04:58,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 03:04:58,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 03:04:58,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 03:04:58,849 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 03:04:58,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 03:04:58,850 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 03:04:58,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 03:04:58,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 03:04:58,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 03:04:58,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 03:04:58,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 03:04:58,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:04:58,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 03:04:58,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 03:04:58,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 03:04:58,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 03:04:58,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 03:04:58,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 03:04:58,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 03:04:58,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 03:04:58,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 03:04:58,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 03:04:58,909 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 03:04:58,909 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 03:04:58,910 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2019-09-08 03:04:58,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ba80817/bd300f0a35b34af388e2d4220c0e8687/FLAGa1b3c60eb [2019-09-08 03:04:59,437 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 03:04:59,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k.i [2019-09-08 03:04:59,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ba80817/bd300f0a35b34af388e2d4220c0e8687/FLAGa1b3c60eb [2019-09-08 03:04:59,858 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ba80817/bd300f0a35b34af388e2d4220c0e8687 [2019-09-08 03:04:59,871 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 03:04:59,873 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 03:04:59,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 03:04:59,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 03:04:59,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 03:04:59,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:04:59" (1/1) ... [2019-09-08 03:04:59,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fd318c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:04:59, skipping insertion in model container [2019-09-08 03:04:59,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 03:04:59" (1/1) ... [2019-09-08 03:04:59,896 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 03:04:59,918 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 03:05:00,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:05:00,148 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 03:05:00,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 03:05:00,178 INFO L192 MainTranslator]: Completed translation [2019-09-08 03:05:00,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00 WrapperNode [2019-09-08 03:05:00,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 03:05:00,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 03:05:00,179 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 03:05:00,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 03:05:00,282 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,297 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... [2019-09-08 03:05:00,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 03:05:00,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 03:05:00,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 03:05:00,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 03:05:00,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 03:05:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 03:05:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 03:05:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-08 03:05:00,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 03:05:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 03:05:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-08 03:05:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-08 03:05:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 03:05:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 03:05:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 03:05:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 03:05:00,534 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 03:05:00,534 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-08 03:05:00,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:05:00 BoogieIcfgContainer [2019-09-08 03:05:00,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 03:05:00,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 03:05:00,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 03:05:00,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 03:05:00,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 03:04:59" (1/3) ... [2019-09-08 03:05:00,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733a73f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:05:00, skipping insertion in model container [2019-09-08 03:05:00,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 03:05:00" (2/3) ... [2019-09-08 03:05:00,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733a73f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 03:05:00, skipping insertion in model container [2019-09-08 03:05:00,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 03:05:00" (3/3) ... [2019-09-08 03:05:00,547 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2019-09-08 03:05:00,559 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 03:05:00,568 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 03:05:00,608 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 03:05:00,671 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 03:05:00,672 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 03:05:00,672 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 03:05:00,672 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 03:05:00,672 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 03:05:00,672 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 03:05:00,673 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 03:05:00,673 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 03:05:00,673 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 03:05:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 03:05:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 03:05:00,696 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:00,697 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:00,699 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:00,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:00,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-09-08 03:05:00,705 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:00,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:00,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:00,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:00,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:00,816 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:05:00,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-08 03:05:00,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-08 03:05:00,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-08 03:05:00,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-08 03:05:00,838 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-08 03:05:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:00,865 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-08 03:05:00,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-08 03:05:00,867 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-08 03:05:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:00,875 INFO L225 Difference]: With dead ends: 32 [2019-09-08 03:05:00,875 INFO L226 Difference]: Without dead ends: 13 [2019-09-08 03:05:00,879 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 [2019-09-08 03:05:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-08 03:05:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-08 03:05:00,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-08 03:05:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-08 03:05:00,918 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-08 03:05:00,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:00,918 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-08 03:05:00,918 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-08 03:05:00,919 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-08 03:05:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-08 03:05:00,919 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:00,920 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:00,920 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-09-08 03:05:00,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:00,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:00,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:00,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:00,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:01,107 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 03:05:01,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-08 03:05:01,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 03:05:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 03:05:01,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 03:05:01,114 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-08 03:05:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:01,178 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-08 03:05:01,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 03:05:01,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-08 03:05:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:01,181 INFO L225 Difference]: With dead ends: 19 [2019-09-08 03:05:01,181 INFO L226 Difference]: Without dead ends: 14 [2019-09-08 03:05:01,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 03:05:01,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-08 03:05:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-08 03:05:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-08 03:05:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-08 03:05:01,190 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-08 03:05:01,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:01,191 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-08 03:05:01,191 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 03:05:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-08 03:05:01,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 03:05:01,193 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:01,193 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:01,194 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-09-08 03:05:01,194 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:01,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:01,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:01,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:01,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:01,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:01,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:05:01,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:01,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-08 03:05:01,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:01,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:01,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-08 03:05:01,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 03:05:01,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 03:05:01,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-08 03:05:01,468 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2019-09-08 03:05:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:01,639 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-09-08 03:05:01,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:05:01,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-09-08 03:05:01,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:01,642 INFO L225 Difference]: With dead ends: 29 [2019-09-08 03:05:01,642 INFO L226 Difference]: Without dead ends: 20 [2019-09-08 03:05:01,644 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-09-08 03:05:01,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-08 03:05:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-08 03:05:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-08 03:05:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-08 03:05:01,651 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2019-09-08 03:05:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:01,651 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-08 03:05:01,651 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 03:05:01,651 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-08 03:05:01,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 03:05:01,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:01,652 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:01,653 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:01,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 2 times [2019-09-08 03:05:01,653 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:01,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:01,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:01,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:01,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:01,771 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:01,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:01,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:05:01,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:05:01,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:01,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-08 03:05:01,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:05:01,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:01,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-09-08 03:05:01,888 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 03:05:01,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 03:05:01,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-08 03:05:01,889 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 11 states. [2019-09-08 03:05:02,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:02,094 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-08 03:05:02,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 03:05:02,094 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-09-08 03:05:02,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:02,096 INFO L225 Difference]: With dead ends: 33 [2019-09-08 03:05:02,096 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 03:05:02,096 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2019-09-08 03:05:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 03:05:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 03:05:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 03:05:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-08 03:05:02,103 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2019-09-08 03:05:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:02,103 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-08 03:05:02,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 03:05:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-08 03:05:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 03:05:02,104 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:02,105 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:02,105 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:02,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:02,105 INFO L82 PathProgramCache]: Analyzing trace with hash -191187985, now seen corresponding path program 3 times [2019-09-08 03:05:02,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:02,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:02,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:02,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:02,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:02,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:02,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:02,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:05:02,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-08 03:05:02,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:02,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-08 03:05:02,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:02,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:02,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2019-09-08 03:05:02,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 03:05:02,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 03:05:02,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-08 03:05:02,432 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 15 states. [2019-09-08 03:05:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:02,775 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2019-09-08 03:05:02,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 03:05:02,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-09-08 03:05:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:02,777 INFO L225 Difference]: With dead ends: 41 [2019-09-08 03:05:02,777 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 03:05:02,778 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2019-09-08 03:05:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 03:05:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 03:05:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 03:05:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-08 03:05:02,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 27 [2019-09-08 03:05:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:02,785 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-08 03:05:02,785 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 03:05:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-08 03:05:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-08 03:05:02,789 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:02,789 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:02,789 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash 217994727, now seen corresponding path program 4 times [2019-09-08 03:05:02,790 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:02,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:02,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:02,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:02,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:03,064 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:03,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:03,065 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:05:03,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:03,100 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:05:03,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:03,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-08 03:05:03,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:03,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:03,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2019-09-08 03:05:03,200 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 03:05:03,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 03:05:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-09-08 03:05:03,201 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 19 states. [2019-09-08 03:05:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:03,748 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2019-09-08 03:05:03,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 03:05:03,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2019-09-08 03:05:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:03,751 INFO L225 Difference]: With dead ends: 49 [2019-09-08 03:05:03,751 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 03:05:03,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 03:05:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 03:05:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-08 03:05:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-08 03:05:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-08 03:05:03,764 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 35 [2019-09-08 03:05:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:03,764 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-08 03:05:03,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 03:05:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-08 03:05:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 03:05:03,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:03,766 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:03,766 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1099137057, now seen corresponding path program 5 times [2019-09-08 03:05:03,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:03,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:03,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:04,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:04,088 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) [2019-09-08 03:05:04,119 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:04,157 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-08 03:05:04,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:04,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-08 03:05:04,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:04,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:04,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2019-09-08 03:05:04,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 03:05:04,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 03:05:04,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2019-09-08 03:05:04,288 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 23 states. [2019-09-08 03:05:05,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:05,099 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2019-09-08 03:05:05,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 03:05:05,100 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2019-09-08 03:05:05,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:05,101 INFO L225 Difference]: With dead ends: 57 [2019-09-08 03:05:05,101 INFO L226 Difference]: Without dead ends: 52 [2019-09-08 03:05:05,102 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 03:05:05,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-08 03:05:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-08 03:05:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-08 03:05:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-08 03:05:05,111 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 43 [2019-09-08 03:05:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:05,111 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-08 03:05:05,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 03:05:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-08 03:05:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-08 03:05:05,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:05,113 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:05,113 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:05,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:05,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1441975849, now seen corresponding path program 6 times [2019-09-08 03:05:05,114 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:05,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:05,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:05,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:05,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:05,517 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:05,517 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) [2019-09-08 03:05:05,535 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:05,562 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-08 03:05:05,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:05,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-08 03:05:05,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:05:05,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:05,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2019-09-08 03:05:05,707 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 03:05:05,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 03:05:05,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2019-09-08 03:05:05,708 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 27 states. [2019-09-08 03:05:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:06,920 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2019-09-08 03:05:06,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 03:05:06,921 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2019-09-08 03:05:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:06,923 INFO L225 Difference]: With dead ends: 65 [2019-09-08 03:05:06,923 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 03:05:06,924 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=655, Invalid=1795, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 03:05:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 03:05:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 03:05:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 03:05:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-08 03:05:06,932 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 51 [2019-09-08 03:05:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:06,932 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-08 03:05:06,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 03:05:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-08 03:05:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-08 03:05:06,934 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:06,934 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:06,934 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:06,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash -123180081, now seen corresponding path program 7 times [2019-09-08 03:05:06,935 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:06,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:06,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:06,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:06,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:07,408 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:07,408 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) [2019-09-08 03:05:07,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:07,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-08 03:05:07,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:07,592 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:07,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2019-09-08 03:05:07,593 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-08 03:05:07,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-08 03:05:07,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2019-09-08 03:05:07,594 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 31 states. [2019-09-08 03:05:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:09,162 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-09-08 03:05:09,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 03:05:09,166 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 59 [2019-09-08 03:05:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:09,168 INFO L225 Difference]: With dead ends: 73 [2019-09-08 03:05:09,168 INFO L226 Difference]: Without dead ends: 68 [2019-09-08 03:05:09,169 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=875, Invalid=2431, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 03:05:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-08 03:05:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-08 03:05:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 03:05:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-08 03:05:09,179 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 59 [2019-09-08 03:05:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:09,179 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-08 03:05:09,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-08 03:05:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-08 03:05:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 03:05:09,181 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:09,181 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:09,181 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1531325895, now seen corresponding path program 8 times [2019-09-08 03:05:09,182 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:09,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:09,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:09,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:09,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:09,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:09,731 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:09,742 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:05:09,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:05:09,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:09,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-08 03:05:09,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:09,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:09,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 35 [2019-09-08 03:05:09,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-08 03:05:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-08 03:05:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2019-09-08 03:05:09,939 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 35 states. [2019-09-08 03:05:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:11,988 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2019-09-08 03:05:11,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 03:05:11,990 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2019-09-08 03:05:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:11,991 INFO L225 Difference]: With dead ends: 81 [2019-09-08 03:05:11,991 INFO L226 Difference]: Without dead ends: 76 [2019-09-08 03:05:11,994 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1127, Invalid=3163, Unknown=0, NotChecked=0, Total=4290 [2019-09-08 03:05:11,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-08 03:05:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-08 03:05:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-08 03:05:12,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-08 03:05:12,002 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 67 [2019-09-08 03:05:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:12,003 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-08 03:05:12,003 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-08 03:05:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-08 03:05:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-08 03:05:12,004 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:12,004 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:12,005 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:12,005 INFO L82 PathProgramCache]: Analyzing trace with hash 182351807, now seen corresponding path program 9 times [2019-09-08 03:05:12,005 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:12,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:12,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:12,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:12,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:12,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:12,725 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 03:05:12,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:12,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-08 03:05:12,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:12,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-08 03:05:12,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:12,930 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:12,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2019-09-08 03:05:12,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-08 03:05:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-08 03:05:12,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2019-09-08 03:05:12,932 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 39 states. [2019-09-08 03:05:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:15,547 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2019-09-08 03:05:15,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-08 03:05:15,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2019-09-08 03:05:15,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:15,548 INFO L225 Difference]: With dead ends: 89 [2019-09-08 03:05:15,548 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 03:05:15,550 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1411, Invalid=3991, Unknown=0, NotChecked=0, Total=5402 [2019-09-08 03:05:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 03:05:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 03:05:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 03:05:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-08 03:05:15,559 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 75 [2019-09-08 03:05:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:15,559 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-08 03:05:15,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-08 03:05:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-08 03:05:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-08 03:05:15,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:15,561 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:15,561 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -932623945, now seen corresponding path program 10 times [2019-09-08 03:05:15,561 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:15,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:15,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:15,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:15,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:15,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:16,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:16,366 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:16,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:05:16,424 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:05:16,425 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:16,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-08 03:05:16,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:05:16,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:16,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 43 [2019-09-08 03:05:16,586 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-08 03:05:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-08 03:05:16,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2019-09-08 03:05:16,587 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 43 states. [2019-09-08 03:05:19,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:19,886 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2019-09-08 03:05:19,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-08 03:05:19,887 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 83 [2019-09-08 03:05:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:19,888 INFO L225 Difference]: With dead ends: 97 [2019-09-08 03:05:19,888 INFO L226 Difference]: Without dead ends: 92 [2019-09-08 03:05:19,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1727, Invalid=4915, Unknown=0, NotChecked=0, Total=6642 [2019-09-08 03:05:19,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-08 03:05:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-08 03:05:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-08 03:05:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-08 03:05:19,899 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 83 [2019-09-08 03:05:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:19,900 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-08 03:05:19,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-08 03:05:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-08 03:05:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 03:05:19,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:19,901 INFO L399 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:19,901 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:19,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:19,902 INFO L82 PathProgramCache]: Analyzing trace with hash -589388881, now seen corresponding path program 11 times [2019-09-08 03:05:19,902 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:19,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:19,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:19,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:19,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:20,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:20,882 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:20,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:05:20,989 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2019-09-08 03:05:20,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:20,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-08 03:05:20,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:21,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:21,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 47 [2019-09-08 03:05:21,178 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-08 03:05:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-08 03:05:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2019-09-08 03:05:21,179 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 47 states. [2019-09-08 03:05:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:25,238 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2019-09-08 03:05:25,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-08 03:05:25,239 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 91 [2019-09-08 03:05:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:25,240 INFO L225 Difference]: With dead ends: 105 [2019-09-08 03:05:25,240 INFO L226 Difference]: Without dead ends: 100 [2019-09-08 03:05:25,242 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2075, Invalid=5935, Unknown=0, NotChecked=0, Total=8010 [2019-09-08 03:05:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-08 03:05:25,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-08 03:05:25,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-08 03:05:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-08 03:05:25,250 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 91 [2019-09-08 03:05:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:25,251 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-08 03:05:25,251 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-08 03:05:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-08 03:05:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-08 03:05:25,252 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:25,252 INFO L399 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:25,252 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:25,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 423003559, now seen corresponding path program 12 times [2019-09-08 03:05:25,253 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:25,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:25,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:25,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:25,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:26,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:26,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:26,417 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:05:26,481 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2019-09-08 03:05:26,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:26,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-08 03:05:26,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:05:26,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:26,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 51 [2019-09-08 03:05:26,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-08 03:05:26,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-08 03:05:26,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2019-09-08 03:05:26,699 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 51 states. [2019-09-08 03:05:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:31,634 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2019-09-08 03:05:31,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 03:05:31,634 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2019-09-08 03:05:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:31,635 INFO L225 Difference]: With dead ends: 113 [2019-09-08 03:05:31,635 INFO L226 Difference]: Without dead ends: 108 [2019-09-08 03:05:31,638 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2455, Invalid=7051, Unknown=0, NotChecked=0, Total=9506 [2019-09-08 03:05:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-08 03:05:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-08 03:05:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-08 03:05:31,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-08 03:05:31,657 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 99 [2019-09-08 03:05:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:31,657 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-08 03:05:31,657 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-08 03:05:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-08 03:05:31,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-08 03:05:31,658 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:31,659 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:31,659 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash -697765985, now seen corresponding path program 13 times [2019-09-08 03:05:31,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:31,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:31,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:31,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:31,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:33,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:33,023 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:33,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:33,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-08 03:05:33,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:33,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:33,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 55 [2019-09-08 03:05:33,418 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 03:05:33,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 03:05:33,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 03:05:33,420 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 55 states. [2019-09-08 03:05:33,714 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 8 [2019-09-08 03:05:33,839 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 9 [2019-09-08 03:05:33,979 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:05:34,106 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:05:34,236 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:05:34,377 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:05:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:39,367 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2019-09-08 03:05:39,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-08 03:05:39,372 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 107 [2019-09-08 03:05:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:39,373 INFO L225 Difference]: With dead ends: 121 [2019-09-08 03:05:39,374 INFO L226 Difference]: Without dead ends: 116 [2019-09-08 03:05:39,380 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2867, Invalid=8263, Unknown=0, NotChecked=0, Total=11130 [2019-09-08 03:05:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-08 03:05:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-08 03:05:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-08 03:05:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2019-09-08 03:05:39,392 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 107 [2019-09-08 03:05:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:39,393 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2019-09-08 03:05:39,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 03:05:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2019-09-08 03:05:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-08 03:05:39,396 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:39,396 INFO L399 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:39,397 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:39,397 INFO L82 PathProgramCache]: Analyzing trace with hash -177348201, now seen corresponding path program 14 times [2019-09-08 03:05:39,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:39,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:39,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:05:39,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:40,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:40,924 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:40,937 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:05:41,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:05:41,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:41,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-08 03:05:41,171 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:41,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:41,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 59 [2019-09-08 03:05:41,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-08 03:05:41,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-08 03:05:41,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2019-09-08 03:05:41,379 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 59 states. [2019-09-08 03:05:41,562 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2019-09-08 03:05:41,690 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2019-09-08 03:05:41,837 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2019-09-08 03:05:41,980 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:05:42,128 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:05:42,261 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:05:42,404 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:05:42,548 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:05:42,688 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:05:48,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:48,471 INFO L93 Difference]: Finished difference Result 129 states and 132 transitions. [2019-09-08 03:05:48,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-08 03:05:48,475 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 115 [2019-09-08 03:05:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:48,476 INFO L225 Difference]: With dead ends: 129 [2019-09-08 03:05:48,476 INFO L226 Difference]: Without dead ends: 124 [2019-09-08 03:05:48,477 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3311, Invalid=9571, Unknown=0, NotChecked=0, Total=12882 [2019-09-08 03:05:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-08 03:05:48,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-08 03:05:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-08 03:05:48,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2019-09-08 03:05:48,484 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 115 [2019-09-08 03:05:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:48,485 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2019-09-08 03:05:48,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-08 03:05:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2019-09-08 03:05:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-08 03:05:48,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:48,486 INFO L399 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:48,486 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:48,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:48,487 INFO L82 PathProgramCache]: Analyzing trace with hash -549626993, now seen corresponding path program 15 times [2019-09-08 03:05:48,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:48,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:48,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:48,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:48,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:05:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:50,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:05:50,342 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:05:50,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:05:50,433 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2019-09-08 03:05:50,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:05:50,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-08 03:05:50,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:05:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:05:50,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:05:50,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 63 [2019-09-08 03:05:50,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-08 03:05:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-08 03:05:50,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2019-09-08 03:05:50,655 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 63 states. [2019-09-08 03:05:50,851 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2019-09-08 03:05:50,989 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 8 [2019-09-08 03:05:51,147 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 9 [2019-09-08 03:05:51,306 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:05:51,473 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:05:51,642 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:05:51,805 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:05:51,970 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:05:52,130 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:05:52,295 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:05:52,470 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:05:52,637 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:05:52,801 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:05:52,970 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:05:53,142 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:05:53,314 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-08 03:05:59,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:05:59,103 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2019-09-08 03:05:59,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-08 03:05:59,104 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2019-09-08 03:05:59,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:05:59,105 INFO L225 Difference]: With dead ends: 137 [2019-09-08 03:05:59,105 INFO L226 Difference]: Without dead ends: 132 [2019-09-08 03:05:59,106 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3787, Invalid=10975, Unknown=0, NotChecked=0, Total=14762 [2019-09-08 03:05:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-08 03:05:59,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2019-09-08 03:05:59,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-08 03:05:59,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2019-09-08 03:05:59,112 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 123 [2019-09-08 03:05:59,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:05:59,113 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2019-09-08 03:05:59,113 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-08 03:05:59,113 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2019-09-08 03:05:59,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-08 03:05:59,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:05:59,114 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:05:59,114 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:05:59,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:05:59,115 INFO L82 PathProgramCache]: Analyzing trace with hash -2066784889, now seen corresponding path program 16 times [2019-09-08 03:05:59,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:05:59,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:05:59,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:59,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:05:59,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:05:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:01,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:06:01,286 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:06:01,296 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:06:01,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:06:01,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:01,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-08 03:06:01,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:01,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:06:01,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 67 [2019-09-08 03:06:01,922 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-08 03:06:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-08 03:06:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2019-09-08 03:06:01,923 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 67 states. [2019-09-08 03:06:02,157 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 8 [2019-09-08 03:06:02,315 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2019-09-08 03:06:02,489 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 9 [2019-09-08 03:06:02,661 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:06:02,840 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:06:03,015 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:06:03,192 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:06:03,370 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:06:03,553 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:06:03,740 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:06:03,929 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:06:04,119 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:06:04,321 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:06:04,517 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:06:04,710 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:06:04,907 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:06:05,096 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:06:05,291 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:06:05,479 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:06:05,673 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-08 03:06:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:12,076 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2019-09-08 03:06:12,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-08 03:06:12,076 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 131 [2019-09-08 03:06:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:12,078 INFO L225 Difference]: With dead ends: 145 [2019-09-08 03:06:12,078 INFO L226 Difference]: Without dead ends: 140 [2019-09-08 03:06:12,081 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4295, Invalid=12475, Unknown=0, NotChecked=0, Total=16770 [2019-09-08 03:06:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-09-08 03:06:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2019-09-08 03:06:12,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-08 03:06:12,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2019-09-08 03:06:12,087 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 131 [2019-09-08 03:06:12,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:12,088 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2019-09-08 03:06:12,088 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-08 03:06:12,088 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2019-09-08 03:06:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-08 03:06:12,089 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:12,089 INFO L399 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:12,089 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:12,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:12,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1595664255, now seen corresponding path program 17 times [2019-09-08 03:06:12,090 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:12,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:12,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:12,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:12,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:14,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:06:14,454 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:06:14,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:06:14,702 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2019-09-08 03:06:14,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:14,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-08 03:06:14,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:14,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:06:14,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 71 [2019-09-08 03:06:14,975 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-08 03:06:14,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-08 03:06:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2019-09-08 03:06:14,976 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 71 states. [2019-09-08 03:06:15,235 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2019-09-08 03:06:15,400 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2019-09-08 03:06:15,579 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2019-09-08 03:06:15,770 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:06:15,974 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:06:16,177 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:06:16,376 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:06:16,576 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:06:16,781 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:06:16,987 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:06:17,196 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:06:17,403 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:06:17,609 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:06:17,805 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:06:18,015 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:06:18,223 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:06:18,441 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:06:18,644 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:06:18,841 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:06:19,048 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:06:19,253 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:06:19,460 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:06:19,661 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:06:26,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:26,563 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2019-09-08 03:06:26,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-08 03:06:26,564 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 139 [2019-09-08 03:06:26,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:26,565 INFO L225 Difference]: With dead ends: 153 [2019-09-08 03:06:26,565 INFO L226 Difference]: Without dead ends: 148 [2019-09-08 03:06:26,566 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=4835, Invalid=14071, Unknown=0, NotChecked=0, Total=18906 [2019-09-08 03:06:26,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-09-08 03:06:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2019-09-08 03:06:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2019-09-08 03:06:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2019-09-08 03:06:26,572 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 139 [2019-09-08 03:06:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:26,573 INFO L475 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2019-09-08 03:06:26,573 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-08 03:06:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2019-09-08 03:06:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-09-08 03:06:26,574 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:26,574 INFO L399 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:26,574 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1864038775, now seen corresponding path program 18 times [2019-09-08 03:06:26,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:26,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:26,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:26,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:26,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:29,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:06:29,395 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:06:29,406 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:06:29,505 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2019-09-08 03:06:29,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:06:29,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-08 03:06:29,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:29,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:06:29,831 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 75 [2019-09-08 03:06:29,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-08 03:06:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-08 03:06:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2019-09-08 03:06:29,833 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 75 states. [2019-09-08 03:06:30,147 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2019-09-08 03:06:30,385 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 8 [2019-09-08 03:06:30,639 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 9 [2019-09-08 03:06:30,854 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:06:31,070 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:06:31,280 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:06:31,498 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:06:31,715 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:06:31,935 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:06:32,152 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:06:32,368 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:06:32,594 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:06:32,819 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:06:33,043 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:06:33,266 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:06:33,496 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:06:33,746 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:06:33,965 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:06:34,189 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:06:34,417 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:06:34,642 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:06:34,866 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:06:35,093 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:06:35,313 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:06:35,539 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:06:43,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:06:43,407 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2019-09-08 03:06:43,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-08 03:06:43,408 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2019-09-08 03:06:43,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:06:43,409 INFO L225 Difference]: With dead ends: 161 [2019-09-08 03:06:43,409 INFO L226 Difference]: Without dead ends: 156 [2019-09-08 03:06:43,410 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=5407, Invalid=15763, Unknown=0, NotChecked=0, Total=21170 [2019-09-08 03:06:43,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-08 03:06:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2019-09-08 03:06:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-08 03:06:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2019-09-08 03:06:43,416 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 147 [2019-09-08 03:06:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:06:43,417 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2019-09-08 03:06:43,417 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-08 03:06:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2019-09-08 03:06:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-08 03:06:43,418 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:06:43,418 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:06:43,418 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:06:43,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:06:43,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1036292975, now seen corresponding path program 19 times [2019-09-08 03:06:43,419 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:06:43,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:06:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:06:43,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:06:43,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:46,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:06:46,351 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:06:46,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:06:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:06:46,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-08 03:06:46,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:06:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:06:47,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:06:47,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 79 [2019-09-08 03:06:47,228 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-08 03:06:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-08 03:06:47,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=6000, Unknown=0, NotChecked=0, Total=6162 [2019-09-08 03:06:47,229 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 79 states. [2019-09-08 03:06:47,497 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 8 [2019-09-08 03:06:47,700 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2019-09-08 03:06:47,926 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 9 [2019-09-08 03:06:48,153 WARN L188 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:06:48,384 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:06:48,614 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:06:48,855 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:06:49,088 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:06:49,320 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:06:49,561 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:06:49,806 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:06:50,051 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:06:50,281 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:06:50,515 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:06:50,755 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:06:51,007 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:06:51,261 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:06:51,514 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:06:51,759 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:06:52,010 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:06:52,268 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:06:52,517 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:06:52,763 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:06:53,013 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:06:53,259 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:06:53,512 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:06:53,747 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:06:53,996 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:06:54,232 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:06:54,472 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:07:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:02,631 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2019-09-08 03:07:02,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-08 03:07:02,632 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 155 [2019-09-08 03:07:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:02,633 INFO L225 Difference]: With dead ends: 169 [2019-09-08 03:07:02,633 INFO L226 Difference]: Without dead ends: 164 [2019-09-08 03:07:02,634 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=6011, Invalid=17551, Unknown=0, NotChecked=0, Total=23562 [2019-09-08 03:07:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-08 03:07:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-08 03:07:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-08 03:07:02,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2019-09-08 03:07:02,640 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 155 [2019-09-08 03:07:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:02,640 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2019-09-08 03:07:02,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-08 03:07:02,641 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2019-09-08 03:07:02,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 03:07:02,641 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:02,642 INFO L399 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:02,642 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:02,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:02,642 INFO L82 PathProgramCache]: Analyzing trace with hash -602884761, now seen corresponding path program 20 times [2019-09-08 03:07:02,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:02,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:02,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:02,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:07:02,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:06,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:07:06,050 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:07:06,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:07:06,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:07:06,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:06,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-08 03:07:06,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:06,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:07:06,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 83 [2019-09-08 03:07:06,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-08 03:07:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-08 03:07:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=6636, Unknown=0, NotChecked=0, Total=6806 [2019-09-08 03:07:06,989 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 83 states. [2019-09-08 03:07:07,309 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2019-09-08 03:07:07,532 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2019-09-08 03:07:07,773 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2019-09-08 03:07:08,013 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:07:08,261 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:07:08,510 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:07:08,767 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:07:09,022 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:07:09,275 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:07:09,534 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:07:09,783 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:07:10,043 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:07:10,295 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:07:10,553 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:07:10,834 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:07:11,102 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:07:11,364 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:07:11,632 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:07:11,901 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:07:12,171 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:07:12,448 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:07:12,709 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:07:12,983 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:07:13,254 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:07:13,522 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:07:13,787 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:07:14,064 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:07:14,335 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:07:14,603 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:07:14,864 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:07:15,122 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:07:15,386 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:07:15,636 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:07:15,893 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:07:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:24,665 INFO L93 Difference]: Finished difference Result 177 states and 180 transitions. [2019-09-08 03:07:24,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-08 03:07:24,667 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 163 [2019-09-08 03:07:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:24,668 INFO L225 Difference]: With dead ends: 177 [2019-09-08 03:07:24,668 INFO L226 Difference]: Without dead ends: 172 [2019-09-08 03:07:24,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=6647, Invalid=19435, Unknown=0, NotChecked=0, Total=26082 [2019-09-08 03:07:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2019-09-08 03:07:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2019-09-08 03:07:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-08 03:07:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2019-09-08 03:07:24,677 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 163 [2019-09-08 03:07:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:24,677 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2019-09-08 03:07:24,677 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-08 03:07:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2019-09-08 03:07:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-09-08 03:07:24,678 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:24,679 INFO L399 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:24,679 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -487104673, now seen corresponding path program 21 times [2019-09-08 03:07:24,679 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:24,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:24,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:24,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:28,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:07:28,436 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:07:28,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:07:28,568 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2019-09-08 03:07:28,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:28,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-08 03:07:28,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:28,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:07:28,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 87 [2019-09-08 03:07:28,859 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-08 03:07:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-08 03:07:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=7304, Unknown=0, NotChecked=0, Total=7482 [2019-09-08 03:07:28,860 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 87 states. [2019-09-08 03:07:29,192 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2019-09-08 03:07:29,431 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 8 [2019-09-08 03:07:29,689 WARN L188 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 9 [2019-09-08 03:07:29,957 WARN L188 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:07:30,226 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:07:30,496 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:07:30,765 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:07:31,043 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:07:31,331 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:07:31,616 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:07:31,902 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:07:32,194 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:07:32,479 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:07:32,771 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:07:33,063 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:07:33,366 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:07:33,652 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:07:33,940 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:07:34,237 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:07:34,527 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:07:34,813 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:07:35,099 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:07:35,394 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:07:35,680 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:07:35,973 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:07:36,279 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:07:36,574 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:07:36,862 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:07:37,155 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:07:37,447 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:07:37,736 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:07:38,029 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:07:38,322 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:07:38,605 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:07:38,880 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:07:39,144 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:07:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:07:48,768 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2019-09-08 03:07:48,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-08 03:07:48,769 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2019-09-08 03:07:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:07:48,770 INFO L225 Difference]: With dead ends: 185 [2019-09-08 03:07:48,771 INFO L226 Difference]: Without dead ends: 180 [2019-09-08 03:07:48,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=7315, Invalid=21415, Unknown=0, NotChecked=0, Total=28730 [2019-09-08 03:07:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-08 03:07:48,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2019-09-08 03:07:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-08 03:07:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 180 transitions. [2019-09-08 03:07:48,779 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 180 transitions. Word has length 171 [2019-09-08 03:07:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:07:48,779 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 180 transitions. [2019-09-08 03:07:48,779 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-08 03:07:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 180 transitions. [2019-09-08 03:07:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-09-08 03:07:48,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:07:48,781 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:07:48,781 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:07:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:07:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1936757079, now seen corresponding path program 22 times [2019-09-08 03:07:48,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:07:48,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:07:48,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:48,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:07:48,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:07:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:07:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:07:52,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:07:52,695 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:07:52,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:07:53,026 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:07:53,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:07:53,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-08 03:07:53,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:07:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 03:07:53,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:07:53,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 91 [2019-09-08 03:07:53,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-08 03:07:53,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-08 03:07:53,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=8004, Unknown=0, NotChecked=0, Total=8190 [2019-09-08 03:07:53,522 INFO L87 Difference]: Start difference. First operand 180 states and 180 transitions. Second operand 91 states. [2019-09-08 03:07:53,833 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 8 [2019-09-08 03:07:54,086 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 8 [2019-09-08 03:07:54,369 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 9 [2019-09-08 03:07:54,656 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:07:54,943 WARN L188 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:07:55,241 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:07:55,535 WARN L188 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:07:55,842 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:07:56,145 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:07:56,441 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:07:56,735 WARN L188 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:07:57,038 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:07:57,342 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:07:57,648 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:07:57,952 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:07:58,255 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:07:58,564 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:07:58,872 WARN L188 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:07:59,185 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:07:59,508 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:07:59,841 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:08:00,165 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:08:00,486 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:08:00,811 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:08:01,135 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:08:01,454 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:08:01,786 WARN L188 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:08:02,121 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:08:02,433 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:08:02,749 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:08:03,079 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:08:03,397 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:08:03,709 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:08:04,026 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:08:04,352 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:08:04,665 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:08:04,970 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:08:05,265 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:08:05,555 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:08:05,844 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:08:06,137 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:08:06,424 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:08:16,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:16,123 INFO L93 Difference]: Finished difference Result 193 states and 196 transitions. [2019-09-08 03:08:16,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-08 03:08:16,124 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 179 [2019-09-08 03:08:16,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:16,125 INFO L225 Difference]: With dead ends: 193 [2019-09-08 03:08:16,125 INFO L226 Difference]: Without dead ends: 188 [2019-09-08 03:08:16,126 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=8015, Invalid=23491, Unknown=0, NotChecked=0, Total=31506 [2019-09-08 03:08:16,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-09-08 03:08:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2019-09-08 03:08:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-09-08 03:08:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2019-09-08 03:08:16,134 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 179 [2019-09-08 03:08:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:16,135 INFO L475 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2019-09-08 03:08:16,135 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-08 03:08:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2019-09-08 03:08:16,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-09-08 03:08:16,136 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:16,136 INFO L399 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:16,136 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:16,137 INFO L82 PathProgramCache]: Analyzing trace with hash 913591119, now seen corresponding path program 23 times [2019-09-08 03:08:16,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:16,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:16,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:16,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:16,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:20,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:08:20,454 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:08:20,464 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:08:20,996 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2019-09-08 03:08:20,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:21,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-08 03:08:21,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:21,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:08:21,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 95 [2019-09-08 03:08:21,574 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-08 03:08:21,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-08 03:08:21,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=8736, Unknown=0, NotChecked=0, Total=8930 [2019-09-08 03:08:21,575 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 95 states. [2019-09-08 03:08:21,965 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 8 [2019-09-08 03:08:22,236 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 8 [2019-09-08 03:08:22,535 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 9 [2019-09-08 03:08:22,841 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:08:23,161 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:08:23,476 WARN L188 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:08:23,788 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:08:24,109 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:08:24,421 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:08:24,743 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:08:25,058 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:08:25,385 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:08:25,710 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:08:26,027 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:08:26,342 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:08:26,703 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:08:27,032 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:08:27,373 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:08:27,711 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:08:28,057 WARN L188 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:08:28,402 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:08:28,755 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:08:29,096 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:08:29,438 WARN L188 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:08:29,777 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:08:30,113 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:08:30,450 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:08:30,793 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:08:31,128 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:08:31,467 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:08:31,808 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:08:32,155 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:08:32,493 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:08:32,831 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:08:33,172 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:08:33,506 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:08:33,839 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:08:34,165 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:08:34,481 WARN L188 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:08:34,801 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:08:35,122 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:08:35,450 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:08:35,760 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:08:36,079 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:08:36,995 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:08:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:08:47,045 INFO L93 Difference]: Finished difference Result 201 states and 204 transitions. [2019-09-08 03:08:47,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-08 03:08:47,046 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 187 [2019-09-08 03:08:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:08:47,047 INFO L225 Difference]: With dead ends: 201 [2019-09-08 03:08:47,047 INFO L226 Difference]: Without dead ends: 196 [2019-09-08 03:08:47,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=8747, Invalid=25663, Unknown=0, NotChecked=0, Total=34410 [2019-09-08 03:08:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-08 03:08:47,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2019-09-08 03:08:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-08 03:08:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 196 transitions. [2019-09-08 03:08:47,055 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 196 transitions. Word has length 187 [2019-09-08 03:08:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:08:47,055 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 196 transitions. [2019-09-08 03:08:47,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-08 03:08:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 196 transitions. [2019-09-08 03:08:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-09-08 03:08:47,056 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:08:47,057 INFO L399 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:08:47,057 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:08:47,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:08:47,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1559924039, now seen corresponding path program 24 times [2019-09-08 03:08:47,057 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:08:47,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:08:47,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:47,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:08:47,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:08:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:08:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:51,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:08:51,971 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:08:51,983 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:08:52,128 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 93 check-sat command(s) [2019-09-08 03:08:52,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:08:52,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-08 03:08:52,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:08:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:08:52,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:08:52,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 99 [2019-09-08 03:08:52,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-08 03:08:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-08 03:08:52,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=9500, Unknown=0, NotChecked=0, Total=9702 [2019-09-08 03:08:52,513 INFO L87 Difference]: Start difference. First operand 196 states and 196 transitions. Second operand 99 states. [2019-09-08 03:08:52,883 WARN L188 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 8 [2019-09-08 03:08:53,175 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 8 [2019-09-08 03:08:53,484 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 9 [2019-09-08 03:08:53,808 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:08:54,140 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:08:54,496 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:08:54,838 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:08:55,183 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:08:55,530 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:08:55,881 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:08:56,243 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:08:56,598 WARN L188 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:08:56,946 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:08:57,291 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:08:57,637 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:08:58,002 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:08:58,351 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:08:58,710 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:08:59,063 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:08:59,422 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:08:59,796 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:09:00,183 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:09:00,553 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:09:00,933 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:09:01,310 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:09:01,683 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:09:02,076 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:09:02,445 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:09:02,816 WARN L188 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:09:03,180 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:09:03,535 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:09:03,898 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:09:04,267 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:09:04,639 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:09:04,994 WARN L188 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:09:05,351 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:09:05,702 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:09:06,051 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:09:06,411 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:09:06,766 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:09:07,129 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:09:07,485 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:09:07,839 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:09:08,198 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:09:08,555 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:09:08,911 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:09:09,265 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:09:09,605 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:09:09,947 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:09:10,285 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:09:10,622 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:09:21,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:21,034 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2019-09-08 03:09:21,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-08 03:09:21,034 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2019-09-08 03:09:21,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:21,035 INFO L225 Difference]: With dead ends: 209 [2019-09-08 03:09:21,036 INFO L226 Difference]: Without dead ends: 204 [2019-09-08 03:09:21,037 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=9511, Invalid=27931, Unknown=0, NotChecked=0, Total=37442 [2019-09-08 03:09:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-09-08 03:09:21,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2019-09-08 03:09:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-09-08 03:09:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 204 transitions. [2019-09-08 03:09:21,046 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 204 transitions. Word has length 195 [2019-09-08 03:09:21,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:21,046 INFO L475 AbstractCegarLoop]: Abstraction has 204 states and 204 transitions. [2019-09-08 03:09:21,046 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-08 03:09:21,046 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 204 transitions. [2019-09-08 03:09:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-09-08 03:09:21,047 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:21,048 INFO L399 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:21,048 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:21,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1610918081, now seen corresponding path program 25 times [2019-09-08 03:09:21,048 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:21,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:21,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:21,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:09:21,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:09:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:26,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:09:26,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:09:26,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:09:27,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-08 03:09:27,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:09:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:09:27,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:09:27,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 103 [2019-09-08 03:09:27,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 103 states [2019-09-08 03:09:27,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2019-09-08 03:09:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=10296, Unknown=0, NotChecked=0, Total=10506 [2019-09-08 03:09:27,783 INFO L87 Difference]: Start difference. First operand 204 states and 204 transitions. Second operand 103 states. [2019-09-08 03:09:28,209 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 8 [2019-09-08 03:09:28,557 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 8 [2019-09-08 03:09:28,904 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 9 [2019-09-08 03:09:29,260 WARN L188 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:09:29,624 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:09:30,003 WARN L188 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:09:30,365 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:09:30,752 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:09:31,129 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:09:31,507 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:09:31,897 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:09:32,273 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:09:32,684 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:09:33,067 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:09:33,460 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:09:33,871 WARN L188 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:09:34,264 WARN L188 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:09:34,656 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:09:35,040 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:09:35,438 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:09:35,843 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:09:36,238 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:09:36,632 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:09:37,023 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:09:37,413 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:09:37,826 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:09:38,250 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:09:38,642 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:09:39,036 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:09:39,436 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:09:39,820 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:09:40,224 WARN L188 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:09:40,623 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:09:41,017 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:09:41,407 WARN L188 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:09:41,796 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:09:42,192 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:09:42,591 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:09:42,973 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:09:43,359 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:09:43,737 WARN L188 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:09:44,131 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:09:44,517 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:09:44,903 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:09:45,294 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:09:45,684 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:09:46,081 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:09:46,483 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:09:46,864 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:09:47,234 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:09:47,609 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:09:47,963 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:09:48,315 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:09:48,667 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:09:59,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:09:59,923 INFO L93 Difference]: Finished difference Result 217 states and 220 transitions. [2019-09-08 03:09:59,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2019-09-08 03:09:59,923 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 203 [2019-09-08 03:09:59,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:09:59,926 INFO L225 Difference]: With dead ends: 217 [2019-09-08 03:09:59,926 INFO L226 Difference]: Without dead ends: 212 [2019-09-08 03:09:59,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=10307, Invalid=30295, Unknown=0, NotChecked=0, Total=40602 [2019-09-08 03:09:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-09-08 03:09:59,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2019-09-08 03:09:59,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2019-09-08 03:09:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2019-09-08 03:09:59,936 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 203 [2019-09-08 03:09:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:09:59,936 INFO L475 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2019-09-08 03:09:59,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 103 states. [2019-09-08 03:09:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2019-09-08 03:09:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-08 03:09:59,938 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:09:59,938 INFO L399 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:09:59,938 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:09:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:09:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1080994103, now seen corresponding path program 26 times [2019-09-08 03:09:59,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:09:59,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:09:59,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:09:59,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:09:59,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:10:05,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:05,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:10:05,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:10:05,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:10:06,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:10:06,412 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:06,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-08 03:10:06,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:07,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:10:07,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 107 [2019-09-08 03:10:07,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-09-08 03:10:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-09-08 03:10:07,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=11124, Unknown=0, NotChecked=0, Total=11342 [2019-09-08 03:10:07,429 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 107 states. [2019-09-08 03:10:07,888 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 8 [2019-09-08 03:10:08,248 WARN L188 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 8 [2019-09-08 03:10:08,626 WARN L188 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 9 [2019-09-08 03:10:09,014 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:10:09,403 WARN L188 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:10:09,790 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:10:10,182 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:10:10,600 WARN L188 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:10:11,037 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:10:11,444 WARN L188 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:10:11,868 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:10:12,283 WARN L188 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:10:12,691 WARN L188 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:10:13,100 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:10:13,518 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:10:13,937 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:10:14,361 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:10:14,770 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:10:15,180 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:10:15,599 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:10:16,029 WARN L188 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:10:16,441 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:10:16,852 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:10:17,260 WARN L188 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:10:17,683 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:10:18,129 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:10:18,550 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:10:18,978 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:10:19,394 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:10:19,820 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:10:20,260 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:10:20,705 WARN L188 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:10:21,145 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:10:21,560 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:10:21,969 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:10:22,383 WARN L188 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:10:22,794 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:10:23,201 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:10:23,596 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:10:23,993 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:10:24,396 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:10:24,803 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:10:25,206 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:10:25,616 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:10:26,027 WARN L188 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:10:26,464 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:10:26,893 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:10:27,310 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:10:27,741 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:10:28,144 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:10:28,547 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:10:28,936 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:10:29,341 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:10:29,726 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:10:30,091 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:10:30,473 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:10:30,961 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:10:43,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:10:43,108 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2019-09-08 03:10:43,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2019-09-08 03:10:43,109 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 211 [2019-09-08 03:10:43,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:10:43,110 INFO L225 Difference]: With dead ends: 225 [2019-09-08 03:10:43,110 INFO L226 Difference]: Without dead ends: 220 [2019-09-08 03:10:43,112 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5458 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=11135, Invalid=32755, Unknown=0, NotChecked=0, Total=43890 [2019-09-08 03:10:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-09-08 03:10:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2019-09-08 03:10:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-09-08 03:10:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 220 transitions. [2019-09-08 03:10:43,120 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 220 transitions. Word has length 211 [2019-09-08 03:10:43,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:10:43,121 INFO L475 AbstractCegarLoop]: Abstraction has 220 states and 220 transitions. [2019-09-08 03:10:43,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 107 states. [2019-09-08 03:10:43,121 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 220 transitions. [2019-09-08 03:10:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-08 03:10:43,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:10:43,122 INFO L399 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:10:43,123 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:10:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:10:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 122454831, now seen corresponding path program 27 times [2019-09-08 03:10:43,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:10:43,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:10:43,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:43,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:10:43,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:10:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:10:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:48,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:10:48,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:10:48,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:10:49,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 105 check-sat command(s) [2019-09-08 03:10:49,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:10:49,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-08 03:10:49,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:10:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:10:49,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:10:49,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 111 [2019-09-08 03:10:49,599 INFO L454 AbstractCegarLoop]: Interpolant automaton has 111 states [2019-09-08 03:10:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2019-09-08 03:10:49,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=11984, Unknown=0, NotChecked=0, Total=12210 [2019-09-08 03:10:49,599 INFO L87 Difference]: Start difference. First operand 220 states and 220 transitions. Second operand 111 states. [2019-09-08 03:10:50,061 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 8 [2019-09-08 03:10:50,436 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 8 [2019-09-08 03:10:50,836 WARN L188 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 9 [2019-09-08 03:10:51,248 WARN L188 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:10:51,658 WARN L188 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:10:52,080 WARN L188 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:10:52,499 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:10:52,924 WARN L188 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:10:53,349 WARN L188 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:10:53,776 WARN L188 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:10:54,212 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:10:54,648 WARN L188 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:10:55,089 WARN L188 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:10:55,525 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:10:55,979 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:10:56,431 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:10:56,881 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:10:57,323 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:10:57,773 WARN L188 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:10:58,237 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:10:58,685 WARN L188 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:10:59,143 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:10:59,588 WARN L188 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:11:00,057 WARN L188 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:11:00,514 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:11:00,973 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:11:01,423 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:11:01,863 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:11:02,298 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:11:02,749 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:11:03,195 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:11:03,635 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:11:04,068 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:11:04,519 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:11:04,974 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:11:05,417 WARN L188 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:11:06,014 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:11:06,492 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:11:06,955 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:11:07,410 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:11:07,859 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:11:08,279 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:11:08,731 WARN L188 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:11:09,175 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:11:09,614 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:11:10,059 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:11:10,498 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:11:10,961 WARN L188 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:11:11,395 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:11:11,819 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:11:12,247 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:11:12,684 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:11:13,118 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:11:13,543 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:11:13,983 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:11:14,409 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:11:14,844 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:11:15,268 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:11:15,669 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:11:16,061 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:11:16,456 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:11:16,837 WARN L188 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:11:17,617 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-08 03:11:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:11:29,024 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2019-09-08 03:11:29,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2019-09-08 03:11:29,024 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2019-09-08 03:11:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:11:29,026 INFO L225 Difference]: With dead ends: 233 [2019-09-08 03:11:29,027 INFO L226 Difference]: Without dead ends: 228 [2019-09-08 03:11:29,029 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=11995, Invalid=35311, Unknown=0, NotChecked=0, Total=47306 [2019-09-08 03:11:29,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-09-08 03:11:29,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2019-09-08 03:11:29,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-09-08 03:11:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2019-09-08 03:11:29,036 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 219 [2019-09-08 03:11:29,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:11:29,037 INFO L475 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2019-09-08 03:11:29,037 INFO L476 AbstractCegarLoop]: Interpolant automaton has 111 states. [2019-09-08 03:11:29,037 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2019-09-08 03:11:29,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-08 03:11:29,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:11:29,038 INFO L399 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:11:29,038 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:11:29,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:11:29,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1166861607, now seen corresponding path program 28 times [2019-09-08 03:11:29,039 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:11:29,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:11:29,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:29,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:11:29,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:11:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:11:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:35,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:11:35,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:11:35,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 03:11:36,981 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 03:11:36,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:11:37,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-08 03:11:37,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:11:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:11:38,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:11:38,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 115 [2019-09-08 03:11:38,298 INFO L454 AbstractCegarLoop]: Interpolant automaton has 115 states [2019-09-08 03:11:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2019-09-08 03:11:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=12876, Unknown=0, NotChecked=0, Total=13110 [2019-09-08 03:11:38,299 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 115 states. [2019-09-08 03:11:38,803 WARN L188 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 8 [2019-09-08 03:11:39,197 WARN L188 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 8 [2019-09-08 03:11:39,643 WARN L188 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 9 [2019-09-08 03:11:40,073 WARN L188 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-08 03:11:40,499 WARN L188 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-08 03:11:40,908 WARN L188 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-08 03:11:41,340 WARN L188 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-08 03:11:41,772 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:11:42,205 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:11:42,637 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:11:43,078 WARN L188 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:11:43,519 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:11:43,982 WARN L188 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:11:44,433 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:11:44,872 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:11:45,338 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:11:45,827 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:11:46,307 WARN L188 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:11:46,778 WARN L188 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:11:47,250 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:11:47,733 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:11:48,212 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:11:48,686 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:11:49,166 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:11:49,639 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:11:50,113 WARN L188 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:11:50,600 WARN L188 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:11:51,066 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:11:51,533 WARN L188 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:11:52,002 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:11:52,486 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:11:52,947 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:11:53,415 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:11:53,890 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:11:54,367 WARN L188 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:11:54,852 WARN L188 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:11:55,332 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:11:55,824 WARN L188 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:11:56,326 WARN L188 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:11:56,800 WARN L188 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:11:57,268 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:11:57,732 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:11:58,196 WARN L188 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:11:58,683 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:11:59,167 WARN L188 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:11:59,630 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:12:00,103 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:12:00,584 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:12:01,061 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:12:01,540 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:12:02,009 WARN L188 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:12:02,471 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:12:02,936 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:12:03,413 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:12:03,877 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:12:04,324 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:12:04,792 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:12:05,246 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:12:05,703 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:12:06,155 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:12:06,608 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:12:07,048 WARN L188 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:12:07,489 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:12:07,931 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:12:08,350 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:12:08,771 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:12:09,188 WARN L188 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:12:09,593 WARN L188 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2019-09-08 03:12:21,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:12:21,557 INFO L93 Difference]: Finished difference Result 241 states and 244 transitions. [2019-09-08 03:12:21,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2019-09-08 03:12:21,557 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 227 [2019-09-08 03:12:21,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:12:21,559 INFO L225 Difference]: With dead ends: 241 [2019-09-08 03:12:21,559 INFO L226 Difference]: Without dead ends: 236 [2019-09-08 03:12:21,561 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6326 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=12887, Invalid=37963, Unknown=0, NotChecked=0, Total=50850 [2019-09-08 03:12:21,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-09-08 03:12:21,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2019-09-08 03:12:21,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2019-09-08 03:12:21,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2019-09-08 03:12:21,569 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 227 [2019-09-08 03:12:21,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:12:21,570 INFO L475 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2019-09-08 03:12:21,570 INFO L476 AbstractCegarLoop]: Interpolant automaton has 115 states. [2019-09-08 03:12:21,570 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2019-09-08 03:12:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-09-08 03:12:21,571 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:12:21,572 INFO L399 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:12:21,572 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:12:21,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:12:21,572 INFO L82 PathProgramCache]: Analyzing trace with hash -735588577, now seen corresponding path program 29 times [2019-09-08 03:12:21,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:12:21,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:12:21,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:21,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:12:21,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:12:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:12:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:28,637 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:12:28,637 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:12:28,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 03:12:29,677 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 113 check-sat command(s) [2019-09-08 03:12:29,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:12:29,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-08 03:12:29,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:12:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:12:30,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:12:30,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 119 [2019-09-08 03:12:30,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 119 states [2019-09-08 03:12:30,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2019-09-08 03:12:30,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=13800, Unknown=0, NotChecked=0, Total=14042 [2019-09-08 03:12:30,208 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 119 states. [2019-09-08 03:12:30,738 WARN L188 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 8 [2019-09-08 03:12:31,157 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 8 [2019-09-08 03:12:31,595 WARN L188 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 9 [2019-09-08 03:12:32,074 WARN L188 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-08 03:12:32,528 WARN L188 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-08 03:12:32,985 WARN L188 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-08 03:12:33,430 WARN L188 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-08 03:12:33,888 WARN L188 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-08 03:12:34,363 WARN L188 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-08 03:12:34,824 WARN L188 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-08 03:12:35,288 WARN L188 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-08 03:12:35,757 WARN L188 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:12:36,237 WARN L188 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:12:36,708 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:12:37,182 WARN L188 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:12:37,690 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:12:38,184 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:12:38,689 WARN L188 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:12:39,197 WARN L188 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:12:39,701 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:12:40,206 WARN L188 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:12:40,725 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:12:41,237 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:12:41,742 WARN L188 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:12:42,255 WARN L188 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:12:42,772 WARN L188 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:12:43,271 WARN L188 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:12:43,763 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:12:44,262 WARN L188 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:12:44,781 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:12:45,286 WARN L188 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:12:45,794 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:12:46,287 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:12:46,785 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:12:47,291 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:12:47,801 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:12:48,299 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:12:48,800 WARN L188 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:12:49,317 WARN L188 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:12:49,826 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:12:50,327 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:12:50,818 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:12:51,294 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:12:51,798 WARN L188 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:12:52,309 WARN L188 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:12:52,822 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:12:53,338 WARN L188 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:12:53,841 WARN L188 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:12:54,350 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:12:54,841 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:12:55,322 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:12:55,806 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:12:56,296 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:12:56,779 WARN L188 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:12:57,277 WARN L188 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:12:57,773 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:12:58,271 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:12:58,777 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:12:59,253 WARN L188 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:12:59,761 WARN L188 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:13:00,233 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:13:00,696 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:13:01,175 WARN L188 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:13:01,656 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:13:02,124 WARN L188 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:13:02,573 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:13:03,016 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:13:03,456 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:13:03,894 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:13:04,327 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:13:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:13:17,441 INFO L93 Difference]: Finished difference Result 249 states and 252 transitions. [2019-09-08 03:13:17,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2019-09-08 03:13:17,442 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 235 [2019-09-08 03:13:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:13:17,444 INFO L225 Difference]: With dead ends: 249 [2019-09-08 03:13:17,444 INFO L226 Difference]: Without dead ends: 244 [2019-09-08 03:13:17,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6784 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=13811, Invalid=40711, Unknown=0, NotChecked=0, Total=54522 [2019-09-08 03:13:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-09-08 03:13:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2019-09-08 03:13:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-09-08 03:13:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 244 transitions. [2019-09-08 03:13:17,454 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 244 transitions. Word has length 235 [2019-09-08 03:13:17,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:13:17,455 INFO L475 AbstractCegarLoop]: Abstraction has 244 states and 244 transitions. [2019-09-08 03:13:17,455 INFO L476 AbstractCegarLoop]: Interpolant automaton has 119 states. [2019-09-08 03:13:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 244 transitions. [2019-09-08 03:13:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-09-08 03:13:17,457 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:13:17,457 INFO L399 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:13:17,457 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:13:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:13:17,457 INFO L82 PathProgramCache]: Analyzing trace with hash 336937239, now seen corresponding path program 30 times [2019-09-08 03:13:17,458 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:13:17,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:13:17,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:17,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:13:17,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:13:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:13:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:25,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:13:25,010 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:13:25,019 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 03:13:25,213 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 117 check-sat command(s) [2019-09-08 03:13:25,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:13:25,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-08 03:13:25,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:13:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:13:25,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:13:25,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 123 [2019-09-08 03:13:25,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 123 states [2019-09-08 03:13:25,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2019-09-08 03:13:25,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=14756, Unknown=0, NotChecked=0, Total=15006 [2019-09-08 03:13:25,699 INFO L87 Difference]: Start difference. First operand 244 states and 244 transitions. Second operand 123 states. [2019-09-08 03:13:26,266 WARN L188 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 8 [2019-09-08 03:13:26,709 WARN L188 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 8 [2019-09-08 03:13:27,174 WARN L188 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 9 [2019-09-08 03:13:27,641 WARN L188 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-08 03:13:28,110 WARN L188 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-08 03:13:28,576 WARN L188 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-08 03:13:29,042 WARN L188 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-08 03:13:29,551 WARN L188 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-08 03:13:30,023 WARN L188 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-08 03:13:30,512 WARN L188 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-08 03:13:30,998 WARN L188 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-08 03:13:31,490 WARN L188 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-08 03:13:31,984 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-08 03:13:32,476 WARN L188 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-08 03:13:32,996 WARN L188 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-08 03:13:33,511 WARN L188 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:13:34,038 WARN L188 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:13:34,574 WARN L188 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:13:35,116 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:13:35,649 WARN L188 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:13:36,203 WARN L188 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:13:36,749 WARN L188 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:13:37,307 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:13:37,882 WARN L188 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:13:38,437 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:13:38,988 WARN L188 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:13:39,528 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:13:40,073 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:13:40,621 WARN L188 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:13:41,173 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:13:41,726 WARN L188 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:13:42,282 WARN L188 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:13:42,847 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:13:43,414 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:13:43,966 WARN L188 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:13:44,517 WARN L188 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:13:45,072 WARN L188 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:13:45,626 WARN L188 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:13:46,176 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:13:46,720 WARN L188 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:13:47,266 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:13:47,790 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:13:48,342 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:13:48,878 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:13:49,426 WARN L188 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:13:49,983 WARN L188 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:13:50,539 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:13:51,093 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:13:51,635 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:13:52,160 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:13:52,688 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:13:53,207 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:13:53,740 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:13:54,266 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:13:54,810 WARN L188 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:13:55,328 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:13:55,869 WARN L188 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:13:56,388 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:13:56,908 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:13:57,425 WARN L188 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:13:57,938 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:13:58,437 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:13:58,955 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:13:59,473 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:13:59,984 WARN L188 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:14:00,487 WARN L188 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:14:00,993 WARN L188 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:14:01,480 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:14:01,990 WARN L188 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:14:02,469 WARN L188 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:14:02,934 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:14:03,394 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:14:03,851 WARN L188 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:14:04,309 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:14:04,766 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:14:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:14:18,204 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2019-09-08 03:14:18,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2019-09-08 03:14:18,205 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2019-09-08 03:14:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:14:18,206 INFO L225 Difference]: With dead ends: 257 [2019-09-08 03:14:18,206 INFO L226 Difference]: Without dead ends: 252 [2019-09-08 03:14:18,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7258 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=14767, Invalid=43555, Unknown=0, NotChecked=0, Total=58322 [2019-09-08 03:14:18,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2019-09-08 03:14:18,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2019-09-08 03:14:18,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-09-08 03:14:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2019-09-08 03:14:18,217 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 243 [2019-09-08 03:14:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:14:18,218 INFO L475 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2019-09-08 03:14:18,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 123 states. [2019-09-08 03:14:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2019-09-08 03:14:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-09-08 03:14:18,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:14:18,220 INFO L399 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:14:18,220 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:14:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:14:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -296928497, now seen corresponding path program 31 times [2019-09-08 03:14:18,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:14:18,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:14:18,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:18,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:14:18,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:14:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:14:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:26,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:14:26,138 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:14:26,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:14:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:14:28,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-08 03:14:28,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:14:29,092 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:14:29,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:14:29,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 127 [2019-09-08 03:14:29,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 127 states [2019-09-08 03:14:29,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2019-09-08 03:14:29,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=15744, Unknown=0, NotChecked=0, Total=16002 [2019-09-08 03:14:29,097 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 127 states. [2019-09-08 03:14:29,655 WARN L188 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 8 [2019-09-08 03:14:30,125 WARN L188 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 8 [2019-09-08 03:14:30,603 WARN L188 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 9 [2019-09-08 03:14:31,096 WARN L188 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-08 03:14:31,587 WARN L188 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-08 03:14:32,080 WARN L188 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-08 03:14:32,576 WARN L188 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-08 03:14:33,082 WARN L188 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-08 03:14:33,594 WARN L188 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-08 03:14:34,143 WARN L188 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-08 03:14:34,680 WARN L188 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-08 03:14:35,223 WARN L188 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-08 03:14:35,759 WARN L188 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-08 03:14:36,294 WARN L188 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-08 03:14:36,831 WARN L188 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-08 03:14:37,380 WARN L188 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-08 03:14:37,936 WARN L188 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-08 03:14:38,529 WARN L188 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-08 03:14:39,093 WARN L188 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-08 03:14:39,646 WARN L188 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:14:40,202 WARN L188 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:14:40,751 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:14:41,308 WARN L188 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:14:41,872 WARN L188 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:14:42,438 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:14:43,012 WARN L188 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:14:43,600 WARN L188 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:14:44,167 WARN L188 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:14:44,727 WARN L188 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:14:45,300 WARN L188 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:14:45,876 WARN L188 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:14:46,449 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:14:47,030 WARN L188 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:14:47,613 WARN L188 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:14:48,196 WARN L188 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:14:48,777 WARN L188 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:14:49,355 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:14:49,945 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:14:50,501 WARN L188 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:14:51,071 WARN L188 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:14:51,630 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:14:52,179 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:14:52,727 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:14:53,296 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:14:53,869 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:14:54,456 WARN L188 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:14:55,045 WARN L188 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:14:55,614 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:14:56,195 WARN L188 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:14:56,786 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:14:57,346 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:14:57,902 WARN L188 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:14:58,466 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:14:59,040 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:14:59,584 WARN L188 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:15:00,162 WARN L188 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:15:00,735 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:15:01,300 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:15:01,853 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:15:02,400 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:15:02,942 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:15:03,483 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:15:04,053 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:15:04,613 WARN L188 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:15:05,155 WARN L188 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:15:05,698 WARN L188 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:15:06,247 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:15:06,781 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:15:07,318 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:15:07,842 WARN L188 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:15:08,359 WARN L188 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:15:08,867 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:15:09,376 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:15:09,863 WARN L188 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:15:10,348 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:15:10,829 WARN L188 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:15:11,302 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:15:11,763 WARN L188 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:15:13,560 WARN L188 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2019-09-08 03:15:26,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:15:26,029 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2019-09-08 03:15:26,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2019-09-08 03:15:26,029 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 251 [2019-09-08 03:15:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:15:26,031 INFO L225 Difference]: With dead ends: 265 [2019-09-08 03:15:26,031 INFO L226 Difference]: Without dead ends: 260 [2019-09-08 03:15:26,033 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7748 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=15755, Invalid=46495, Unknown=0, NotChecked=0, Total=62250 [2019-09-08 03:15:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2019-09-08 03:15:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2019-09-08 03:15:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-08 03:15:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2019-09-08 03:15:26,043 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 251 [2019-09-08 03:15:26,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:15:26,044 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2019-09-08 03:15:26,044 INFO L476 AbstractCegarLoop]: Interpolant automaton has 127 states. [2019-09-08 03:15:26,044 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2019-09-08 03:15:26,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-09-08 03:15:26,045 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:15:26,045 INFO L399 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:15:26,046 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:15:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:15:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash -741884665, now seen corresponding path program 32 times [2019-09-08 03:15:26,046 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:15:26,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:15:26,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:26,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 03:15:26,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:15:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:15:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:34,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:15:34,632 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:15:34,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 03:15:36,274 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 03:15:36,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:15:37,362 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-08 03:15:37,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:15:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:15:37,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:15:37,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 131 [2019-09-08 03:15:37,869 INFO L454 AbstractCegarLoop]: Interpolant automaton has 131 states [2019-09-08 03:15:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2019-09-08 03:15:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=16764, Unknown=0, NotChecked=0, Total=17030 [2019-09-08 03:15:37,870 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 131 states. [2019-09-08 03:15:38,490 WARN L188 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 8 [2019-09-08 03:15:38,963 WARN L188 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 375 DAG size of output: 8 [2019-09-08 03:15:39,474 WARN L188 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 9 [2019-09-08 03:15:39,988 WARN L188 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-08 03:15:40,532 WARN L188 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-08 03:15:41,078 WARN L188 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-08 03:15:41,626 WARN L188 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-08 03:15:42,187 WARN L188 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-08 03:15:42,746 WARN L188 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-08 03:15:43,317 WARN L188 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-08 03:15:43,875 WARN L188 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-08 03:15:44,441 WARN L188 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-08 03:15:45,021 WARN L188 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-08 03:15:45,599 WARN L188 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-08 03:15:46,179 WARN L188 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-08 03:15:46,757 WARN L188 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-08 03:15:47,355 WARN L188 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-08 03:15:47,956 WARN L188 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-08 03:15:48,567 WARN L188 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-08 03:15:49,168 WARN L188 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-08 03:15:49,766 WARN L188 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-08 03:15:50,376 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-08 03:15:50,984 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-08 03:15:51,589 WARN L188 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:15:52,203 WARN L188 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:15:52,824 WARN L188 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:15:53,451 WARN L188 SmtUtils]: Spent 363.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:15:54,069 WARN L188 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:15:54,709 WARN L188 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:15:55,330 WARN L188 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:15:55,950 WARN L188 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:15:56,572 WARN L188 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:15:57,188 WARN L188 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:15:57,805 WARN L188 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:15:58,427 WARN L188 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:15:59,048 WARN L188 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:15:59,669 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:16:00,288 WARN L188 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:16:00,901 WARN L188 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:16:01,545 WARN L188 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:16:02,161 WARN L188 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:16:02,769 WARN L188 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:16:03,362 WARN L188 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:16:03,968 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:16:04,592 WARN L188 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:16:05,217 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:16:05,857 WARN L188 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:16:06,479 WARN L188 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:16:07,108 WARN L188 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:16:07,730 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:16:08,335 WARN L188 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:16:08,943 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:16:09,564 WARN L188 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:16:10,169 WARN L188 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:16:10,764 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:16:11,377 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:16:11,992 WARN L188 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:16:12,596 WARN L188 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:16:13,180 WARN L188 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:16:13,766 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:16:14,345 WARN L188 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:16:14,914 WARN L188 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:16:15,507 WARN L188 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:16:16,103 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:16:16,700 WARN L188 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:16:17,290 WARN L188 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:16:17,875 WARN L188 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:16:18,447 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:16:19,039 WARN L188 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:16:19,603 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:16:20,158 WARN L188 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:16:20,711 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:16:21,264 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:16:21,827 WARN L188 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:16:22,328 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:16:22,863 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:16:23,406 WARN L188 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:16:23,938 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:16:24,458 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:16:24,952 WARN L188 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:16:25,439 WARN L188 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:16:25,931 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:16:26,409 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2019-09-08 03:16:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:16:40,929 INFO L93 Difference]: Finished difference Result 273 states and 276 transitions. [2019-09-08 03:16:40,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2019-09-08 03:16:40,930 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 259 [2019-09-08 03:16:40,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:16:40,931 INFO L225 Difference]: With dead ends: 273 [2019-09-08 03:16:40,931 INFO L226 Difference]: Without dead ends: 268 [2019-09-08 03:16:40,933 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8254 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=16775, Invalid=49531, Unknown=0, NotChecked=0, Total=66306 [2019-09-08 03:16:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-09-08 03:16:40,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2019-09-08 03:16:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-09-08 03:16:40,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2019-09-08 03:16:40,939 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 259 [2019-09-08 03:16:40,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:16:40,940 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2019-09-08 03:16:40,940 INFO L476 AbstractCegarLoop]: Interpolant automaton has 131 states. [2019-09-08 03:16:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2019-09-08 03:16:40,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-09-08 03:16:40,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:16:40,942 INFO L399 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:16:40,942 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:16:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:16:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1115896065, now seen corresponding path program 33 times [2019-09-08 03:16:40,942 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:16:40,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:16:40,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:40,943 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:16:40,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:16:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 03:16:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:50,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 03:16:50,087 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 03:16:50,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 03:16:50,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 129 check-sat command(s) [2019-09-08 03:16:50,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 03:16:50,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-08 03:16:50,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 03:16:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 03:16:50,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 03:16:50,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 135 [2019-09-08 03:16:50,823 INFO L454 AbstractCegarLoop]: Interpolant automaton has 135 states [2019-09-08 03:16:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2019-09-08 03:16:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=17816, Unknown=0, NotChecked=0, Total=18090 [2019-09-08 03:16:50,824 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 135 states. [2019-09-08 03:16:51,484 WARN L188 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 8 [2019-09-08 03:16:52,008 WARN L188 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 8 [2019-09-08 03:16:52,567 WARN L188 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 9 [2019-09-08 03:16:53,154 WARN L188 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 11 [2019-09-08 03:16:53,728 WARN L188 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 11 [2019-09-08 03:16:54,300 WARN L188 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 11 [2019-09-08 03:16:54,882 WARN L188 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 11 [2019-09-08 03:16:55,460 WARN L188 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 11 [2019-09-08 03:16:56,041 WARN L188 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 11 [2019-09-08 03:16:56,603 WARN L188 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 11 [2019-09-08 03:16:57,169 WARN L188 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 371 DAG size of output: 11 [2019-09-08 03:16:57,753 WARN L188 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 11 [2019-09-08 03:16:58,378 WARN L188 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 11 [2019-09-08 03:16:58,970 WARN L188 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 11 [2019-09-08 03:16:59,559 WARN L188 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 11 [2019-09-08 03:17:00,154 WARN L188 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 11 [2019-09-08 03:17:00,755 WARN L188 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 11 [2019-09-08 03:17:01,352 WARN L188 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 11 [2019-09-08 03:17:01,955 WARN L188 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 11 [2019-09-08 03:17:02,576 WARN L188 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 11 [2019-09-08 03:17:03,216 WARN L188 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 11 [2019-09-08 03:17:03,856 WARN L188 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 11 [2019-09-08 03:17:04,517 WARN L188 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 11 [2019-09-08 03:17:05,159 WARN L188 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 11 [2019-09-08 03:17:05,808 WARN L188 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 11 [2019-09-08 03:17:06,443 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 11 [2019-09-08 03:17:07,103 WARN L188 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 11 [2019-09-08 03:17:07,764 WARN L188 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 11 [2019-09-08 03:17:08,397 WARN L188 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 11 [2019-09-08 03:17:09,037 WARN L188 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 11 [2019-09-08 03:17:09,656 WARN L188 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 311 DAG size of output: 11 [2019-09-08 03:17:10,284 WARN L188 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 11 [2019-09-08 03:17:10,926 WARN L188 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 11 [2019-09-08 03:17:11,602 WARN L188 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 11 [2019-09-08 03:17:12,235 WARN L188 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 11 [2019-09-08 03:17:12,865 WARN L188 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 11 [2019-09-08 03:17:13,500 WARN L188 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 11 [2019-09-08 03:17:14,128 WARN L188 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 11 [2019-09-08 03:17:14,753 WARN L188 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 11 [2019-09-08 03:17:15,405 WARN L188 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 11 [2019-09-08 03:17:16,053 WARN L188 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 11 [2019-09-08 03:17:16,700 WARN L188 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 11 [2019-09-08 03:17:17,337 WARN L188 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 11 [2019-09-08 03:17:17,985 WARN L188 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 11 [2019-09-08 03:17:18,629 WARN L188 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 11 [2019-09-08 03:17:19,294 WARN L188 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 266 DAG size of output: 11 [2019-09-08 03:17:19,981 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 11 [2019-09-08 03:17:20,606 WARN L188 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 11 [2019-09-08 03:17:21,238 WARN L188 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 11 [2019-09-08 03:17:21,888 WARN L188 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 11 [2019-09-08 03:17:22,527 WARN L188 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 11 [2019-09-08 03:17:23,162 WARN L188 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 11 [2019-09-08 03:17:23,814 WARN L188 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2019-09-08 03:17:24,464 WARN L188 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2019-09-08 03:17:25,093 WARN L188 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2019-09-08 03:17:25,719 WARN L188 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2019-09-08 03:17:26,359 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2019-09-08 03:17:26,970 WARN L188 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2019-09-08 03:17:27,616 WARN L188 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2019-09-08 03:17:28,239 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2019-09-08 03:17:28,856 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2019-09-08 03:17:29,509 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2019-09-08 03:17:30,146 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2019-09-08 03:17:30,788 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2019-09-08 03:17:31,419 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2019-09-08 03:17:32,056 WARN L188 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2019-09-08 03:17:32,682 WARN L188 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2019-09-08 03:17:33,301 WARN L188 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2019-09-08 03:17:33,919 WARN L188 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2019-09-08 03:17:34,530 WARN L188 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2019-09-08 03:17:35,133 WARN L188 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2019-09-08 03:17:35,731 WARN L188 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2019-09-08 03:17:36,324 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2019-09-08 03:17:36,919 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2019-09-08 03:17:37,490 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2019-09-08 03:17:38,065 WARN L188 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2019-09-08 03:17:38,622 WARN L188 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2019-09-08 03:17:39,186 WARN L188 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2019-09-08 03:17:39,739 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2019-09-08 03:17:40,288 WARN L188 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2019-09-08 03:17:40,847 WARN L188 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2019-09-08 03:17:41,365 WARN L188 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2019-09-08 03:17:41,885 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2019-09-08 03:17:42,405 WARN L188 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2019-09-08 03:17:42,904 WARN L188 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2019-09-08 03:17:43,420 WARN L188 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2019-09-08 03:17:58,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 03:17:58,804 INFO L93 Difference]: Finished difference Result 281 states and 284 transitions. [2019-09-08 03:17:58,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2019-09-08 03:17:58,804 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 267 [2019-09-08 03:17:58,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 03:17:58,806 INFO L225 Difference]: With dead ends: 281 [2019-09-08 03:17:58,806 INFO L226 Difference]: Without dead ends: 276 [2019-09-08 03:17:58,807 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8776 ImplicationChecksByTransitivity, 74.9s TimeCoverageRelationStatistics Valid=17827, Invalid=52663, Unknown=0, NotChecked=0, Total=70490 [2019-09-08 03:17:58,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-09-08 03:17:58,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2019-09-08 03:17:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2019-09-08 03:17:58,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 276 transitions. [2019-09-08 03:17:58,816 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 276 transitions. Word has length 267 [2019-09-08 03:17:58,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 03:17:58,817 INFO L475 AbstractCegarLoop]: Abstraction has 276 states and 276 transitions. [2019-09-08 03:17:58,817 INFO L476 AbstractCegarLoop]: Interpolant automaton has 135 states. [2019-09-08 03:17:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 276 transitions. [2019-09-08 03:17:58,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-09-08 03:17:58,818 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 03:17:58,819 INFO L399 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 03:17:58,819 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 03:17:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 03:17:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash 744773879, now seen corresponding path program 34 times [2019-09-08 03:17:58,819 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 03:17:58,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 03:17:58,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:17:58,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 03:17:58,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 03:18:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat