java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:50:23,729 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:50:23,731 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:50:23,751 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:50:23,751 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:50:23,752 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:50:23,754 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:50:23,756 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:50:23,757 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:50:23,758 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:50:23,759 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:50:23,759 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:50:23,760 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:50:23,761 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:50:23,763 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:50:23,763 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:50:23,764 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:50:23,766 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:50:23,772 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:50:23,776 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:50:23,777 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:50:23,781 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:50:23,788 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-06 22:50:23,789 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-06 22:50:23,789 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-06 22:50:23,790 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-06 22:50:23,791 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-06 22:50:23,792 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-06 22:50:23,794 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-06 22:50:23,798 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-06 22:50:23,798 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-06 22:50:23,799 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-06 22:50:23,799 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-06 22:50:23,799 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-06 22:50:23,802 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-06 22:50:23,803 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-06 22:50:23,804 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:50:23,829 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:50:23,829 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:50:23,830 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:50:23,830 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:50:23,832 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:50:23,832 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:50:23,832 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:50:23,835 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:50:23,835 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:50:23,835 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:50:23,835 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:50:23,836 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:50:23,836 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:50:23,836 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:50:23,836 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:50:23,836 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:50:23,837 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:50:23,837 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:50:23,837 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:50:23,838 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:50:23,839 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:50:23,839 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:50:23,839 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:50:23,839 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:50:23,839 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:50:23,840 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:50:23,840 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:50:23,840 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:50:23,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:50:23,902 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:50:23,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:50:23,908 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:50:23,908 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:50:23,909 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-11-06 22:50:23,974 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f9f3944/bc97145d19a44708b9fb089f75b994e9/FLAG0a8f57a3c [2018-11-06 22:50:24,424 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:50:24,425 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/up_true-unreach-call_true-termination.i [2018-11-06 22:50:24,431 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f9f3944/bc97145d19a44708b9fb089f75b994e9/FLAG0a8f57a3c [2018-11-06 22:50:24,446 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f9f3944/bc97145d19a44708b9fb089f75b994e9 [2018-11-06 22:50:24,455 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:50:24,457 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:50:24,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:50:24,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:50:24,462 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:50:24,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e83fd99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24, skipping insertion in model container [2018-11-06 22:50:24,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:50:24,501 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:50:24,725 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:50:24,730 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:50:24,749 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:50:24,766 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:50:24,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24 WrapperNode [2018-11-06 22:50:24,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:50:24,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:50:24,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:50:24,768 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:50:24,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,784 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,806 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:50:24,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:50:24,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:50:24,806 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:50:24,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,828 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (1/1) ... [2018-11-06 22:50:24,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:50:24,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:50:24,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:50:24,834 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:50:24,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (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 [2018-11-06 22:50:24,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:50:24,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:50:25,208 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:50:25,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:25 BoogieIcfgContainer [2018-11-06 22:50:25,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:50:25,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:50:25,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:50:25,219 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:50:25,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:50:24" (1/3) ... [2018-11-06 22:50:25,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280c4a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:25, skipping insertion in model container [2018-11-06 22:50:25,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:50:24" (2/3) ... [2018-11-06 22:50:25,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@280c4a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:50:25, skipping insertion in model container [2018-11-06 22:50:25,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:50:25" (3/3) ... [2018-11-06 22:50:25,226 INFO L112 eAbstractionObserver]: Analyzing ICFG up_true-unreach-call_true-termination.i [2018-11-06 22:50:25,239 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:50:25,255 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:50:25,286 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:50:25,348 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:50:25,348 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:50:25,349 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:50:25,349 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:50:25,349 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:50:25,349 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:50:25,349 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:50:25,349 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:50:25,350 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:50:25,366 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-11-06 22:50:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-11-06 22:50:25,373 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:25,374 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:25,377 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:25,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:25,383 INFO L82 PathProgramCache]: Analyzing trace with hash 383759085, now seen corresponding path program 1 times [2018-11-06 22:50:25,385 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:25,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:25,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:25,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:25,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:25,511 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:50:25,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:50:25,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:50:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:50:25,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:50:25,535 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-11-06 22:50:25,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:25,553 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2018-11-06 22:50:25,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:50:25,555 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2018-11-06 22:50:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:25,566 INFO L225 Difference]: With dead ends: 24 [2018-11-06 22:50:25,566 INFO L226 Difference]: Without dead ends: 11 [2018-11-06 22:50:25,570 INFO L604 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 [2018-11-06 22:50:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-11-06 22:50:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-11-06 22:50:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-06 22:50:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-11-06 22:50:25,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-11-06 22:50:25,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:25,608 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-11-06 22:50:25,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:50:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-11-06 22:50:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-06 22:50:25,609 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:25,609 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:25,609 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:25,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:25,610 INFO L82 PathProgramCache]: Analyzing trace with hash 325884241, now seen corresponding path program 1 times [2018-11-06 22:50:25,610 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:25,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:25,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:25,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:25,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:25,713 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:50:25,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 22:50:25,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:50:25,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:50:25,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:50:25,716 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2018-11-06 22:50:25,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:25,893 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2018-11-06 22:50:25,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:50:25,893 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-11-06 22:50:25,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:25,894 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:50:25,894 INFO L226 Difference]: Without dead ends: 13 [2018-11-06 22:50:25,896 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:50:25,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-06 22:50:25,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-06 22:50:25,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-06 22:50:25,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-11-06 22:50:25,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-11-06 22:50:25,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:25,901 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-11-06 22:50:25,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:50:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-11-06 22:50:25,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-06 22:50:25,902 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:25,902 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:25,903 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:25,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1748104565, now seen corresponding path program 1 times [2018-11-06 22:50:25,903 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:25,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:25,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:25,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:25,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:26,001 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:50:26,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-06 22:50:26,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:50:26,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:50:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:50:26,003 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2018-11-06 22:50:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:26,156 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-11-06 22:50:26,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-06 22:50:26,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-06 22:50:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:26,157 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:50:26,157 INFO L226 Difference]: Without dead ends: 23 [2018-11-06 22:50:26,158 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:50:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-06 22:50:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-11-06 22:50:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-06 22:50:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-11-06 22:50:26,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-11-06 22:50:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:26,163 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-11-06 22:50:26,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:50:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-11-06 22:50:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-06 22:50:26,164 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:26,164 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:26,164 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:26,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1639575084, now seen corresponding path program 1 times [2018-11-06 22:50:26,165 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:26,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:26,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:26,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:26,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:26,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:26,452 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:50:26,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:26,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:26,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:26,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-11-06 22:50:26,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:50:26,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:50:26,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:50:26,620 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states. [2018-11-06 22:50:26,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:26,805 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-11-06 22:50:26,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:50:26,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-11-06 22:50:26,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:26,807 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:50:26,807 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:50:26,808 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:50:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:50:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:50:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:50:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-06 22:50:26,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2018-11-06 22:50:26,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:26,812 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-06 22:50:26,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:50:26,812 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-06 22:50:26,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-06 22:50:26,813 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:26,813 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:26,813 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:26,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash 842542990, now seen corresponding path program 2 times [2018-11-06 22:50:26,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:26,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:26,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:26,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:26,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:26,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:26,966 INFO L225 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 [2018-11-06 22:50:26,985 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:27,002 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:27,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:27,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:27,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:27,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-11-06 22:50:27,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:50:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:50:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:50:27,057 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2018-11-06 22:50:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:27,400 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2018-11-06 22:50:27,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:50:27,400 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-11-06 22:50:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:27,401 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:50:27,401 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:50:27,402 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:50:27,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:50:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-11-06 22:50:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-06 22:50:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-06 22:50:27,408 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2018-11-06 22:50:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:27,408 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-06 22:50:27,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:50:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-11-06 22:50:27,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-06 22:50:27,409 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:27,409 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:27,410 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:27,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:27,410 INFO L82 PathProgramCache]: Analyzing trace with hash -46138025, now seen corresponding path program 3 times [2018-11-06 22:50:27,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:27,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:27,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:27,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:27,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:27,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:27,689 INFO L225 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 [2018-11-06 22:50:27,697 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:27,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-06 22:50:27,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:27,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:27,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:27,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-11-06 22:50:27,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:50:27,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:50:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:50:27,849 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 12 states. [2018-11-06 22:50:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:28,066 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-11-06 22:50:28,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-06 22:50:28,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-11-06 22:50:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:28,067 INFO L225 Difference]: With dead ends: 41 [2018-11-06 22:50:28,067 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:50:28,068 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:50:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:50:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-06 22:50:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-06 22:50:28,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-06 22:50:28,073 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2018-11-06 22:50:28,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:28,073 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-06 22:50:28,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:50:28,074 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-06 22:50:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-06 22:50:28,074 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:28,074 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:28,075 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:28,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash -676370543, now seen corresponding path program 4 times [2018-11-06 22:50:28,075 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:28,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:28,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:28,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:28,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:28,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:28,205 INFO L225 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:50:28,219 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:28,255 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:28,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:28,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:28,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:28,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-11-06 22:50:28,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:50:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:50:28,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:50:28,342 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2018-11-06 22:50:28,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:28,532 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-11-06 22:50:28,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-06 22:50:28,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-11-06 22:50:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:28,534 INFO L225 Difference]: With dead ends: 37 [2018-11-06 22:50:28,534 INFO L226 Difference]: Without dead ends: 35 [2018-11-06 22:50:28,535 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:50:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-11-06 22:50:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-11-06 22:50:28,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-06 22:50:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2018-11-06 22:50:28,541 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2018-11-06 22:50:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:28,542 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-06 22:50:28,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:50:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2018-11-06 22:50:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-06 22:50:28,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:28,543 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:28,544 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:28,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:28,544 INFO L82 PathProgramCache]: Analyzing trace with hash 612727770, now seen corresponding path program 5 times [2018-11-06 22:50:28,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:28,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:28,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:28,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:28,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:28,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:28,827 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:50:28,837 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:28,870 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-11-06 22:50:28,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:28,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:29,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:29,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-11-06 22:50:29,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:50:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:50:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:50:29,016 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 15 states. [2018-11-06 22:50:29,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:29,515 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2018-11-06 22:50:29,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:50:29,515 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2018-11-06 22:50:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:29,516 INFO L225 Difference]: With dead ends: 51 [2018-11-06 22:50:29,516 INFO L226 Difference]: Without dead ends: 30 [2018-11-06 22:50:29,518 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:50:29,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-11-06 22:50:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-11-06 22:50:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-11-06 22:50:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2018-11-06 22:50:29,527 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2018-11-06 22:50:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:29,529 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2018-11-06 22:50:29,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:50:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2018-11-06 22:50:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-06 22:50:29,530 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:29,530 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:29,530 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:29,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:29,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2140745068, now seen corresponding path program 6 times [2018-11-06 22:50:29,531 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:29,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:29,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:29,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:29,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:29,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:29,719 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:50:29,728 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:29,750 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-06 22:50:29,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:29,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:29,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:29,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-11-06 22:50:29,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-06 22:50:29,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-06 22:50:29,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-11-06 22:50:29,808 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2018-11-06 22:50:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:29,959 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2018-11-06 22:50:29,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:50:29,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2018-11-06 22:50:29,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:29,960 INFO L225 Difference]: With dead ends: 43 [2018-11-06 22:50:29,961 INFO L226 Difference]: Without dead ends: 41 [2018-11-06 22:50:29,961 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:50:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-06 22:50:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2018-11-06 22:50:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-11-06 22:50:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-11-06 22:50:29,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-11-06 22:50:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:29,968 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-11-06 22:50:29,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-06 22:50:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-11-06 22:50:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-06 22:50:29,970 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:29,970 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:29,970 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:29,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2109320541, now seen corresponding path program 7 times [2018-11-06 22:50:29,971 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:29,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:29,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:29,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:29,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:30,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:30,147 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:50:30,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:30,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:30,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:30,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-11-06 22:50:30,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:50:30,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:50:30,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:50:30,327 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states. [2018-11-06 22:50:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:30,591 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-11-06 22:50:30,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:50:30,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2018-11-06 22:50:30,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:30,593 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:50:30,593 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:50:30,594 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:50:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:50:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:50:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:50:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-11-06 22:50:30,600 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2018-11-06 22:50:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:30,601 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-11-06 22:50:30,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:50:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-11-06 22:50:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-11-06 22:50:30,602 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:30,602 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:30,602 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:30,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:30,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1946783895, now seen corresponding path program 8 times [2018-11-06 22:50:30,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:30,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:30,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:30,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:30,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:30,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:30,812 INFO L225 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 [2018-11-06 22:50:30,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:30,850 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:30,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:30,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:30,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:30,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-11-06 22:50:30,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-06 22:50:30,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-06 22:50:30,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-11-06 22:50:30,908 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 11 states. [2018-11-06 22:50:31,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:31,085 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-11-06 22:50:31,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:50:31,087 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2018-11-06 22:50:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:31,089 INFO L225 Difference]: With dead ends: 49 [2018-11-06 22:50:31,089 INFO L226 Difference]: Without dead ends: 47 [2018-11-06 22:50:31,090 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:50:31,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-11-06 22:50:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2018-11-06 22:50:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-06 22:50:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2018-11-06 22:50:31,098 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2018-11-06 22:50:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:31,098 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2018-11-06 22:50:31,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-06 22:50:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2018-11-06 22:50:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-11-06 22:50:31,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:31,100 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:31,100 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:31,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1173860832, now seen corresponding path program 9 times [2018-11-06 22:50:31,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:31,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:31,102 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:31,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:31,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:31,402 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:50:31,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:31,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-06 22:50:31,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:31,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:31,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:31,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-11-06 22:50:31,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:50:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:50:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:50:31,855 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 21 states. [2018-11-06 22:50:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:32,367 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2018-11-06 22:50:32,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-06 22:50:32,367 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2018-11-06 22:50:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:32,368 INFO L225 Difference]: With dead ends: 71 [2018-11-06 22:50:32,368 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:50:32,369 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:50:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:50:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:50:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:50:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2018-11-06 22:50:32,375 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2018-11-06 22:50:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:32,375 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2018-11-06 22:50:32,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:50:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2018-11-06 22:50:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-06 22:50:32,376 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:32,376 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:32,376 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:32,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash 666550682, now seen corresponding path program 10 times [2018-11-06 22:50:32,377 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:32,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:32,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:32,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:32,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:32,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:32,491 INFO L225 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 [2018-11-06 22:50:32,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:32,517 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:32,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:32,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:32,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:32,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-11-06 22:50:32,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:50:32,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:50:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:50:32,623 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 12 states. [2018-11-06 22:50:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:32,783 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-11-06 22:50:32,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-11-06 22:50:32,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2018-11-06 22:50:32,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:32,784 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:50:32,785 INFO L226 Difference]: Without dead ends: 53 [2018-11-06 22:50:32,786 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:50:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-06 22:50:32,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2018-11-06 22:50:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-06 22:50:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-11-06 22:50:32,794 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2018-11-06 22:50:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:32,794 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-11-06 22:50:32,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:50:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-11-06 22:50:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-06 22:50:32,796 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:32,796 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:32,796 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:32,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1808968035, now seen corresponding path program 11 times [2018-11-06 22:50:32,797 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:32,797 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:32,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:32,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:32,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:33,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:33,085 INFO L225 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 [2018-11-06 22:50:33,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:33,159 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-11-06 22:50:33,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:33,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 78 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:33,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:33,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-11-06 22:50:33,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:50:33,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:50:33,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:50:33,376 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 24 states. [2018-11-06 22:50:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:33,675 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-11-06 22:50:33,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:50:33,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2018-11-06 22:50:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:33,676 INFO L225 Difference]: With dead ends: 81 [2018-11-06 22:50:33,676 INFO L226 Difference]: Without dead ends: 48 [2018-11-06 22:50:33,677 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:50:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-11-06 22:50:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-11-06 22:50:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:50:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2018-11-06 22:50:33,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2018-11-06 22:50:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:33,687 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2018-11-06 22:50:33,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:50:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2018-11-06 22:50:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-11-06 22:50:33,688 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:33,688 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:33,689 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:33,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1676311139, now seen corresponding path program 12 times [2018-11-06 22:50:33,689 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:33,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:33,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:33,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:33,922 INFO L225 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 [2018-11-06 22:50:33,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:33,999 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-11-06 22:50:33,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:34,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 56 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:34,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:34,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-11-06 22:50:34,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:50:34,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:50:34,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:50:34,079 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 13 states. [2018-11-06 22:50:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:34,324 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-11-06 22:50:34,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-06 22:50:34,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2018-11-06 22:50:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:34,325 INFO L225 Difference]: With dead ends: 61 [2018-11-06 22:50:34,325 INFO L226 Difference]: Without dead ends: 59 [2018-11-06 22:50:34,326 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:50:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-06 22:50:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2018-11-06 22:50:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-06 22:50:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2018-11-06 22:50:34,342 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2018-11-06 22:50:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:34,343 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2018-11-06 22:50:34,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:50:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2018-11-06 22:50:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-06 22:50:34,344 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:34,344 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:34,344 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:34,344 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash -313150490, now seen corresponding path program 13 times [2018-11-06 22:50:34,344 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:34,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:34,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:34,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:34,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:34,886 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:34,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:34,887 INFO L225 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 [2018-11-06 22:50:34,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:34,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 105 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:35,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:35,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2018-11-06 22:50:35,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:50:35,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:50:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:50:35,238 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 27 states. [2018-11-06 22:50:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:35,619 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-11-06 22:50:35,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 22:50:35,620 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2018-11-06 22:50:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:35,620 INFO L225 Difference]: With dead ends: 91 [2018-11-06 22:50:35,620 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:50:35,623 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:50:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:50:35,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:50:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:50:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2018-11-06 22:50:35,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2018-11-06 22:50:35,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:35,632 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2018-11-06 22:50:35,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:50:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2018-11-06 22:50:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-06 22:50:35,633 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:35,633 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:35,633 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:35,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash 992804000, now seen corresponding path program 14 times [2018-11-06 22:50:35,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:35,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:35,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:35,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:35,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:35,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:35,843 INFO L225 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 [2018-11-06 22:50:35,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:35,878 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:35,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:35,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 72 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:35,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:35,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-11-06 22:50:35,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-06 22:50:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-06 22:50:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-11-06 22:50:35,951 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 14 states. [2018-11-06 22:50:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:36,329 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2018-11-06 22:50:36,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 22:50:36,330 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-06 22:50:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:36,330 INFO L225 Difference]: With dead ends: 67 [2018-11-06 22:50:36,330 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:50:36,331 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:50:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:50:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2018-11-06 22:50:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-06 22:50:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2018-11-06 22:50:36,341 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2018-11-06 22:50:36,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:36,341 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2018-11-06 22:50:36,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-06 22:50:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2018-11-06 22:50:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-06 22:50:36,342 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:36,342 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:36,342 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:36,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1241255575, now seen corresponding path program 15 times [2018-11-06 22:50:36,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:36,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:36,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:36,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:36,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:36,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:36,640 INFO L225 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 [2018-11-06 22:50:36,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:36,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-06 22:50:36,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:36,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 136 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:36,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:36,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2018-11-06 22:50:36,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:50:36,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:50:36,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:50:36,904 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 30 states. [2018-11-06 22:50:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:37,184 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-11-06 22:50:37,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:50:37,184 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2018-11-06 22:50:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:37,185 INFO L225 Difference]: With dead ends: 101 [2018-11-06 22:50:37,185 INFO L226 Difference]: Without dead ends: 60 [2018-11-06 22:50:37,186 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:50:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-06 22:50:37,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-11-06 22:50:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-11-06 22:50:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-11-06 22:50:37,194 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2018-11-06 22:50:37,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:37,195 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-11-06 22:50:37,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:50:37,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-11-06 22:50:37,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-06 22:50:37,196 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:37,196 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:37,196 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:37,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:37,196 INFO L82 PathProgramCache]: Analyzing trace with hash 915162787, now seen corresponding path program 16 times [2018-11-06 22:50:37,197 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:37,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:37,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:37,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:37,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:37,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:37,412 INFO L225 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 [2018-11-06 22:50:37,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:37,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:37,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:37,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 90 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:37,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:37,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-11-06 22:50:37,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-06 22:50:37,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-06 22:50:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-11-06 22:50:37,489 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 15 states. [2018-11-06 22:50:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:37,684 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-11-06 22:50:37,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-06 22:50:37,685 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 59 [2018-11-06 22:50:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:37,686 INFO L225 Difference]: With dead ends: 73 [2018-11-06 22:50:37,686 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 22:50:37,687 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:50:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 22:50:37,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2018-11-06 22:50:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-11-06 22:50:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2018-11-06 22:50:37,697 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2018-11-06 22:50:37,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:37,697 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2018-11-06 22:50:37,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-06 22:50:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2018-11-06 22:50:37,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-06 22:50:37,699 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:37,699 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:37,699 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:37,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash -52919828, now seen corresponding path program 17 times [2018-11-06 22:50:37,700 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:37,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:37,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:37,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:37,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:38,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:38,338 INFO L225 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 [2018-11-06 22:50:38,347 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:38,384 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-11-06 22:50:38,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:38,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 171 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:39,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:39,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2018-11-06 22:50:39,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:50:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:50:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:50:39,125 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 33 states. [2018-11-06 22:50:39,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:39,533 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2018-11-06 22:50:39,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 22:50:39,533 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2018-11-06 22:50:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:39,534 INFO L225 Difference]: With dead ends: 111 [2018-11-06 22:50:39,534 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:50:39,534 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:50:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:50:39,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-11-06 22:50:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-11-06 22:50:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2018-11-06 22:50:39,543 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2018-11-06 22:50:39,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:39,544 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2018-11-06 22:50:39,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:50:39,544 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2018-11-06 22:50:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-11-06 22:50:39,545 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:39,545 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:39,545 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:39,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1698071462, now seen corresponding path program 18 times [2018-11-06 22:50:39,546 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:39,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:39,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:39,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:39,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:40,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:40,465 INFO L225 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 [2018-11-06 22:50:40,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:40,553 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-11-06 22:50:40,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:40,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 110 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:40,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:40,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-11-06 22:50:40,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:50:40,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:50:40,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:50:40,683 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 16 states. [2018-11-06 22:50:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:41,146 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2018-11-06 22:50:41,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 22:50:41,146 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 65 [2018-11-06 22:50:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:41,147 INFO L225 Difference]: With dead ends: 79 [2018-11-06 22:50:41,147 INFO L226 Difference]: Without dead ends: 77 [2018-11-06 22:50:41,148 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=277, Invalid=479, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:50:41,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-11-06 22:50:41,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2018-11-06 22:50:41,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-11-06 22:50:41,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-11-06 22:50:41,157 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2018-11-06 22:50:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:41,158 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-11-06 22:50:41,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:50:41,158 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-11-06 22:50:41,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-06 22:50:41,158 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:41,159 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:41,159 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:41,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash 575047023, now seen corresponding path program 19 times [2018-11-06 22:50:41,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:41,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:41,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:41,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:41,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:41,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:41,588 INFO L225 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 [2018-11-06 22:50:41,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:41,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 210 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:41,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:41,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2018-11-06 22:50:41,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:50:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:50:41,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:50:41,938 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 36 states. [2018-11-06 22:50:42,872 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-11-06 22:50:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:42,875 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2018-11-06 22:50:42,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-11-06 22:50:42,875 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 69 [2018-11-06 22:50:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:42,876 INFO L225 Difference]: With dead ends: 121 [2018-11-06 22:50:42,876 INFO L226 Difference]: Without dead ends: 72 [2018-11-06 22:50:42,879 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:50:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-06 22:50:42,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-11-06 22:50:42,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-11-06 22:50:42,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2018-11-06 22:50:42,888 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2018-11-06 22:50:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:42,888 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2018-11-06 22:50:42,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:50:42,889 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2018-11-06 22:50:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-11-06 22:50:42,889 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:42,889 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:42,890 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:42,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:42,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1582902359, now seen corresponding path program 20 times [2018-11-06 22:50:42,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:42,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:42,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:42,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:42,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:43,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:43,921 INFO L225 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 [2018-11-06 22:50:43,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:43,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:43,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:43,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:44,028 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 132 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:44,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:44,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-11-06 22:50:44,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:50:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:50:44,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:50:44,049 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 17 states. [2018-11-06 22:50:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:44,351 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-11-06 22:50:44,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-11-06 22:50:44,352 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2018-11-06 22:50:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:44,353 INFO L225 Difference]: With dead ends: 85 [2018-11-06 22:50:44,353 INFO L226 Difference]: Without dead ends: 83 [2018-11-06 22:50:44,354 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=551, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:50:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-06 22:50:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2018-11-06 22:50:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-06 22:50:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2018-11-06 22:50:44,362 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2018-11-06 22:50:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:44,363 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2018-11-06 22:50:44,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:50:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2018-11-06 22:50:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-11-06 22:50:44,364 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:44,364 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:44,364 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:44,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash 238623730, now seen corresponding path program 21 times [2018-11-06 22:50:44,364 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:44,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:44,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:44,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:44,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:44,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:44,698 INFO L225 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 [2018-11-06 22:50:44,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:44,747 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-11-06 22:50:44,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:44,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 253 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:45,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:45,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2018-11-06 22:50:45,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:50:45,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:50:45,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:50:45,396 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 39 states. [2018-11-06 22:50:45,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:45,879 INFO L93 Difference]: Finished difference Result 131 states and 133 transitions. [2018-11-06 22:50:45,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 22:50:45,879 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 75 [2018-11-06 22:50:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:45,880 INFO L225 Difference]: With dead ends: 131 [2018-11-06 22:50:45,880 INFO L226 Difference]: Without dead ends: 78 [2018-11-06 22:50:45,881 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:50:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-06 22:50:45,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-11-06 22:50:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-11-06 22:50:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2018-11-06 22:50:45,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2018-11-06 22:50:45,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:45,891 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2018-11-06 22:50:45,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:50:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2018-11-06 22:50:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-11-06 22:50:45,892 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:45,892 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:45,892 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:45,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1479518548, now seen corresponding path program 22 times [2018-11-06 22:50:45,893 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:45,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:45,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:45,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:45,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:46,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:46,310 INFO L225 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 [2018-11-06 22:50:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:46,385 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:46,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:46,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 156 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:46,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:46,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-11-06 22:50:46,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-11-06 22:50:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-11-06 22:50:46,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-11-06 22:50:46,661 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 18 states. [2018-11-06 22:50:46,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:46,960 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2018-11-06 22:50:46,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-11-06 22:50:46,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 77 [2018-11-06 22:50:46,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:46,961 INFO L225 Difference]: With dead ends: 91 [2018-11-06 22:50:46,961 INFO L226 Difference]: Without dead ends: 89 [2018-11-06 22:50:46,962 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=364, Invalid=628, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:50:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-11-06 22:50:46,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2018-11-06 22:50:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-06 22:50:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2018-11-06 22:50:46,972 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2018-11-06 22:50:46,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:46,972 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2018-11-06 22:50:46,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-11-06 22:50:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2018-11-06 22:50:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-11-06 22:50:46,973 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:46,973 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:46,973 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:46,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:46,973 INFO L82 PathProgramCache]: Analyzing trace with hash 236152181, now seen corresponding path program 23 times [2018-11-06 22:50:46,974 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:46,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:46,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:46,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:46,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:47,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:47,330 INFO L225 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 [2018-11-06 22:50:47,338 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:47,379 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-06 22:50:47,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:47,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 300 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:47,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:47,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2018-11-06 22:50:47,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:50:47,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:50:47,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:50:47,732 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 42 states. [2018-11-06 22:50:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:48,231 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2018-11-06 22:50:48,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-11-06 22:50:48,231 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 81 [2018-11-06 22:50:48,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:48,232 INFO L225 Difference]: With dead ends: 141 [2018-11-06 22:50:48,232 INFO L226 Difference]: Without dead ends: 84 [2018-11-06 22:50:48,234 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 22:50:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-06 22:50:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-11-06 22:50:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-11-06 22:50:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2018-11-06 22:50:48,245 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2018-11-06 22:50:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:48,245 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2018-11-06 22:50:48,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:50:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2018-11-06 22:50:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-11-06 22:50:48,246 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:48,246 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:48,246 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:48,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:48,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1931357359, now seen corresponding path program 24 times [2018-11-06 22:50:48,247 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:48,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:48,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:48,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:48,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:48,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:48,683 INFO L225 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 [2018-11-06 22:50:48,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:48,740 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-11-06 22:50:48,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:48,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 182 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:48,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:48,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-11-06 22:50:48,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-06 22:50:48,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-06 22:50:48,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:50:48,841 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 19 states. [2018-11-06 22:50:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:49,150 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-11-06 22:50:49,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 22:50:49,151 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-11-06 22:50:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:49,152 INFO L225 Difference]: With dead ends: 97 [2018-11-06 22:50:49,152 INFO L226 Difference]: Without dead ends: 95 [2018-11-06 22:50:49,153 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:50:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-11-06 22:50:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2018-11-06 22:50:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-11-06 22:50:49,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2018-11-06 22:50:49,164 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2018-11-06 22:50:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:49,165 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2018-11-06 22:50:49,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-06 22:50:49,165 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2018-11-06 22:50:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-11-06 22:50:49,165 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:49,166 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:49,166 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:49,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:49,166 INFO L82 PathProgramCache]: Analyzing trace with hash 850428408, now seen corresponding path program 25 times [2018-11-06 22:50:49,166 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:49,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:49,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:49,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:49,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:49,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:49,664 INFO L225 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 [2018-11-06 22:50:49,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:49,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 351 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:50,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:50,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2018-11-06 22:50:50,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:50:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:50:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:50:50,137 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 45 states. [2018-11-06 22:50:50,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:50,984 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-11-06 22:50:50,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-11-06 22:50:50,984 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 87 [2018-11-06 22:50:50,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:50,985 INFO L225 Difference]: With dead ends: 151 [2018-11-06 22:50:50,985 INFO L226 Difference]: Without dead ends: 90 [2018-11-06 22:50:50,986 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=854, Invalid=2686, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:50:50,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-06 22:50:50,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-11-06 22:50:50,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-06 22:50:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2018-11-06 22:50:50,997 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2018-11-06 22:50:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:50,998 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2018-11-06 22:50:50,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:50:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2018-11-06 22:50:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-11-06 22:50:50,998 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:50,998 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:50,998 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:50,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 477328818, now seen corresponding path program 26 times [2018-11-06 22:50:50,999 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:50,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:50,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:51,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:51,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:51,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:51,316 INFO L225 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 [2018-11-06 22:50:51,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:50:51,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:50:51,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:51,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 210 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:51,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:51,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-11-06 22:50:51,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:50:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:50:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:50:51,439 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 20 states. [2018-11-06 22:50:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:51,726 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2018-11-06 22:50:51,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-11-06 22:50:51,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2018-11-06 22:50:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:51,727 INFO L225 Difference]: With dead ends: 103 [2018-11-06 22:50:51,727 INFO L226 Difference]: Without dead ends: 101 [2018-11-06 22:50:51,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=463, Invalid=797, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:50:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-11-06 22:50:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2018-11-06 22:50:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-11-06 22:50:51,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2018-11-06 22:50:51,741 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2018-11-06 22:50:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:51,741 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2018-11-06 22:50:51,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:50:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2018-11-06 22:50:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-11-06 22:50:51,742 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:51,742 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:51,742 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:51,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:51,742 INFO L82 PathProgramCache]: Analyzing trace with hash 778277243, now seen corresponding path program 27 times [2018-11-06 22:50:51,742 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:51,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:51,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:51,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:51,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:52,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:52,337 INFO L225 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 [2018-11-06 22:50:52,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:50:52,404 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-11-06 22:50:52,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:52,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 406 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:52,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:52,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2018-11-06 22:50:52,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:50:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:50:52,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:50:52,850 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 48 states. [2018-11-06 22:50:53,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:53,450 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-11-06 22:50:53,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-11-06 22:50:53,450 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 93 [2018-11-06 22:50:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:53,451 INFO L225 Difference]: With dead ends: 161 [2018-11-06 22:50:53,451 INFO L226 Difference]: Without dead ends: 96 [2018-11-06 22:50:53,453 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:50:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-11-06 22:50:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-11-06 22:50:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-11-06 22:50:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2018-11-06 22:50:53,467 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2018-11-06 22:50:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:53,468 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2018-11-06 22:50:53,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:50:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2018-11-06 22:50:53,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-11-06 22:50:53,469 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:53,469 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:53,469 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:53,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 942363061, now seen corresponding path program 28 times [2018-11-06 22:50:53,469 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:53,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:53,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:53,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:53,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:53,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:53,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:53,819 INFO L225 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 [2018-11-06 22:50:53,827 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:50:53,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:50:53,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:53,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 240 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:53,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:53,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-11-06 22:50:53,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-11-06 22:50:53,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-11-06 22:50:53,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-11-06 22:50:53,946 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2018-11-06 22:50:54,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:54,269 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-11-06 22:50:54,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-06 22:50:54,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 95 [2018-11-06 22:50:54,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:54,270 INFO L225 Difference]: With dead ends: 109 [2018-11-06 22:50:54,270 INFO L226 Difference]: Without dead ends: 107 [2018-11-06 22:50:54,271 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=517, Invalid=889, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:50:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-11-06 22:50:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2018-11-06 22:50:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-11-06 22:50:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2018-11-06 22:50:54,285 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2018-11-06 22:50:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:54,285 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2018-11-06 22:50:54,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-11-06 22:50:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2018-11-06 22:50:54,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-11-06 22:50:54,286 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:54,286 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:54,286 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:54,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1292389378, now seen corresponding path program 29 times [2018-11-06 22:50:54,286 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:54,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:54,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:54,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:54,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:54,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:54,817 INFO L225 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 [2018-11-06 22:50:54,825 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:50:55,040 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-11-06 22:50:55,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:55,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 465 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:55,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:55,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2018-11-06 22:50:55,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-06 22:50:55,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-06 22:50:55,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2018-11-06 22:50:55,525 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 51 states. [2018-11-06 22:50:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:56,264 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2018-11-06 22:50:56,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-11-06 22:50:56,264 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 99 [2018-11-06 22:50:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:56,265 INFO L225 Difference]: With dead ends: 171 [2018-11-06 22:50:56,265 INFO L226 Difference]: Without dead ends: 102 [2018-11-06 22:50:56,267 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1087, Invalid=3469, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 22:50:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-11-06 22:50:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-11-06 22:50:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-06 22:50:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2018-11-06 22:50:56,283 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2018-11-06 22:50:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:56,283 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2018-11-06 22:50:56,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-06 22:50:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2018-11-06 22:50:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-11-06 22:50:56,283 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:56,284 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:56,284 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:56,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1273438024, now seen corresponding path program 30 times [2018-11-06 22:50:56,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:56,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:56,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:56,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:56,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:56,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:56,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:56,584 INFO L225 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 [2018-11-06 22:50:56,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:50:56,654 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-11-06 22:50:56,654 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:50:56,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 272 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:56,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:56,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-11-06 22:50:56,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:50:56,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:50:56,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:50:56,727 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 22 states. [2018-11-06 22:50:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:50:57,039 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2018-11-06 22:50:57,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-11-06 22:50:57,040 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2018-11-06 22:50:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:50:57,041 INFO L225 Difference]: With dead ends: 115 [2018-11-06 22:50:57,041 INFO L226 Difference]: Without dead ends: 113 [2018-11-06 22:50:57,042 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=574, Invalid=986, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:50:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-11-06 22:50:57,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 106. [2018-11-06 22:50:57,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-11-06 22:50:57,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2018-11-06 22:50:57,057 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2018-11-06 22:50:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:50:57,058 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2018-11-06 22:50:57,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:50:57,058 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2018-11-06 22:50:57,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-11-06 22:50:57,058 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:50:57,058 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:50:57,059 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:50:57,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:50:57,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1336936833, now seen corresponding path program 31 times [2018-11-06 22:50:57,059 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:50:57,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:50:57,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:57,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:50:57,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:50:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:57,636 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:50:57,636 INFO L225 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 [2018-11-06 22:50:57,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:50:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:50:57,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:50:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 528 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:50:59,396 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:50:59,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2018-11-06 22:50:59,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-11-06 22:50:59,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-11-06 22:50:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 22:50:59,398 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 54 states. [2018-11-06 22:51:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:01,384 INFO L93 Difference]: Finished difference Result 181 states and 183 transitions. [2018-11-06 22:51:01,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-11-06 22:51:01,384 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 105 [2018-11-06 22:51:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:01,385 INFO L225 Difference]: With dead ends: 181 [2018-11-06 22:51:01,385 INFO L226 Difference]: Without dead ends: 108 [2018-11-06 22:51:01,386 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1214, Invalid=3898, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:51:01,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-11-06 22:51:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-11-06 22:51:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-11-06 22:51:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-11-06 22:51:01,401 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2018-11-06 22:51:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:01,402 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-11-06 22:51:01,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-11-06 22:51:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-11-06 22:51:01,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-11-06 22:51:01,402 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:01,402 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:01,403 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:01,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:01,403 INFO L82 PathProgramCache]: Analyzing trace with hash 898056891, now seen corresponding path program 32 times [2018-11-06 22:51:01,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:01,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:01,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:01,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:01,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:01,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:02,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:02,320 INFO L225 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 [2018-11-06 22:51:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:51:02,382 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:51:02,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:02,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 306 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:02,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:02,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-11-06 22:51:02,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-11-06 22:51:02,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-11-06 22:51:02,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-11-06 22:51:02,465 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2018-11-06 22:51:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:02,816 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-11-06 22:51:02,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-11-06 22:51:02,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-11-06 22:51:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:02,817 INFO L225 Difference]: With dead ends: 121 [2018-11-06 22:51:02,817 INFO L226 Difference]: Without dead ends: 119 [2018-11-06 22:51:02,817 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=634, Invalid=1088, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:51:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-11-06 22:51:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2018-11-06 22:51:02,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-06 22:51:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2018-11-06 22:51:02,838 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2018-11-06 22:51:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:02,839 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2018-11-06 22:51:02,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-11-06 22:51:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2018-11-06 22:51:02,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-11-06 22:51:02,839 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:02,839 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:02,839 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:02,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:02,840 INFO L82 PathProgramCache]: Analyzing trace with hash -817384956, now seen corresponding path program 33 times [2018-11-06 22:51:02,840 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:02,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:02,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:02,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:02,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:03,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:03,489 INFO L225 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 [2018-11-06 22:51:03,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:51:03,557 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-11-06 22:51:03,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:03,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 595 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:04,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:04,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2018-11-06 22:51:04,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-06 22:51:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-06 22:51:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2018-11-06 22:51:04,373 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 57 states. [2018-11-06 22:51:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:05,305 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2018-11-06 22:51:05,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-11-06 22:51:05,306 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 111 [2018-11-06 22:51:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:05,307 INFO L225 Difference]: With dead ends: 191 [2018-11-06 22:51:05,307 INFO L226 Difference]: Without dead ends: 114 [2018-11-06 22:51:05,307 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1348, Invalid=4352, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:51:05,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-11-06 22:51:05,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-11-06 22:51:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-06 22:51:05,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2018-11-06 22:51:05,323 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2018-11-06 22:51:05,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:05,323 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2018-11-06 22:51:05,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-06 22:51:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2018-11-06 22:51:05,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-06 22:51:05,324 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:05,324 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:05,324 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:05,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash -147220546, now seen corresponding path program 34 times [2018-11-06 22:51:05,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:05,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:05,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:05,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:05,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:05,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:05,758 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:05,767 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:51:05,816 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:51:05,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:05,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 937 backedges. 342 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:05,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:05,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-11-06 22:51:05,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-11-06 22:51:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-11-06 22:51:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-11-06 22:51:05,939 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 24 states. [2018-11-06 22:51:06,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:06,428 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2018-11-06 22:51:06,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-11-06 22:51:06,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2018-11-06 22:51:06,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:06,429 INFO L225 Difference]: With dead ends: 127 [2018-11-06 22:51:06,429 INFO L226 Difference]: Without dead ends: 125 [2018-11-06 22:51:06,430 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=697, Invalid=1195, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:51:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-11-06 22:51:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2018-11-06 22:51:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-11-06 22:51:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-11-06 22:51:06,454 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2018-11-06 22:51:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:06,454 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-11-06 22:51:06,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-11-06 22:51:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-11-06 22:51:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-11-06 22:51:06,455 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:06,455 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:06,455 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:06,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:06,456 INFO L82 PathProgramCache]: Analyzing trace with hash 368168327, now seen corresponding path program 35 times [2018-11-06 22:51:06,456 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:06,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:06,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:06,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:06,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:08,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:08,426 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:08,435 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:51:08,497 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-11-06 22:51:08,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:08,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 666 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:09,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:09,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2018-11-06 22:51:09,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-11-06 22:51:09,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-11-06 22:51:09,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:51:09,221 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 60 states. [2018-11-06 22:51:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:10,212 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2018-11-06 22:51:10,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-11-06 22:51:10,212 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 117 [2018-11-06 22:51:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:10,213 INFO L225 Difference]: With dead ends: 201 [2018-11-06 22:51:10,213 INFO L226 Difference]: Without dead ends: 120 [2018-11-06 22:51:10,213 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1489, Invalid=4831, Unknown=0, NotChecked=0, Total=6320 [2018-11-06 22:51:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-11-06 22:51:10,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-11-06 22:51:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-06 22:51:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2018-11-06 22:51:10,229 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2018-11-06 22:51:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:10,229 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2018-11-06 22:51:10,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-11-06 22:51:10,230 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2018-11-06 22:51:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-11-06 22:51:10,230 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:10,230 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:10,230 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:10,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash 661323713, now seen corresponding path program 36 times [2018-11-06 22:51:10,231 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:10,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:10,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:10,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:10,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:10,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:10,531 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:10,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:51:10,620 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-06 22:51:10,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:10,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1046 backedges. 380 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:10,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:10,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-11-06 22:51:10,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-06 22:51:10,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-06 22:51:10,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-11-06 22:51:10,999 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 25 states. [2018-11-06 22:51:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:12,192 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-11-06 22:51:12,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-11-06 22:51:12,192 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 119 [2018-11-06 22:51:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:12,193 INFO L225 Difference]: With dead ends: 133 [2018-11-06 22:51:12,193 INFO L226 Difference]: Without dead ends: 131 [2018-11-06 22:51:12,194 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=763, Invalid=1307, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:51:12,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-11-06 22:51:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2018-11-06 22:51:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-11-06 22:51:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2018-11-06 22:51:12,219 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2018-11-06 22:51:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:12,220 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2018-11-06 22:51:12,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-06 22:51:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2018-11-06 22:51:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-11-06 22:51:12,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:12,221 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:12,221 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:12,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:12,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2136570890, now seen corresponding path program 37 times [2018-11-06 22:51:12,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:12,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:12,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:12,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:12,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:13,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:13,452 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:13,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:13,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1121 backedges. 741 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:14,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:14,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2018-11-06 22:51:14,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-11-06 22:51:14,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-11-06 22:51:14,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2018-11-06 22:51:14,351 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 63 states. [2018-11-06 22:51:15,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:15,312 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-11-06 22:51:15,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-11-06 22:51:15,312 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 123 [2018-11-06 22:51:15,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:15,313 INFO L225 Difference]: With dead ends: 211 [2018-11-06 22:51:15,313 INFO L226 Difference]: Without dead ends: 126 [2018-11-06 22:51:15,314 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2018-11-06 22:51:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-11-06 22:51:15,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-11-06 22:51:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-11-06 22:51:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2018-11-06 22:51:15,338 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2018-11-06 22:51:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:15,339 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2018-11-06 22:51:15,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-11-06 22:51:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2018-11-06 22:51:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-06 22:51:15,340 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:15,340 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:15,340 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:15,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -976315708, now seen corresponding path program 38 times [2018-11-06 22:51:15,340 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:15,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:15,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:15,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:15,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:15,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:15,755 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:15,763 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:51:15,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:51:15,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:15,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 420 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:15,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:15,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-11-06 22:51:15,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-11-06 22:51:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-11-06 22:51:15,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:51:15,881 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 26 states. [2018-11-06 22:51:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:16,660 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2018-11-06 22:51:16,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-11-06 22:51:16,660 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 125 [2018-11-06 22:51:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:16,661 INFO L225 Difference]: With dead ends: 139 [2018-11-06 22:51:16,661 INFO L226 Difference]: Without dead ends: 137 [2018-11-06 22:51:16,662 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=832, Invalid=1424, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:51:16,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-11-06 22:51:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2018-11-06 22:51:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-11-06 22:51:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2018-11-06 22:51:16,689 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2018-11-06 22:51:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:16,690 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2018-11-06 22:51:16,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-11-06 22:51:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2018-11-06 22:51:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-11-06 22:51:16,691 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:16,691 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:16,691 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:16,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1130242675, now seen corresponding path program 39 times [2018-11-06 22:51:16,691 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:16,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:16,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:16,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:16,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:17,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:17,809 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:17,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:51:17,897 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-11-06 22:51:17,897 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:17,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 820 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:18,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:18,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2018-11-06 22:51:18,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-11-06 22:51:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-11-06 22:51:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 22:51:18,684 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 66 states. [2018-11-06 22:51:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:19,748 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-11-06 22:51:19,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-06 22:51:19,748 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 129 [2018-11-06 22:51:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:19,749 INFO L225 Difference]: With dead ends: 221 [2018-11-06 22:51:19,749 INFO L226 Difference]: Without dead ends: 132 [2018-11-06 22:51:19,750 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1792, Invalid=5864, Unknown=0, NotChecked=0, Total=7656 [2018-11-06 22:51:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-11-06 22:51:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-11-06 22:51:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-11-06 22:51:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2018-11-06 22:51:19,771 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2018-11-06 22:51:19,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:19,772 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2018-11-06 22:51:19,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-11-06 22:51:19,772 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2018-11-06 22:51:19,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-11-06 22:51:19,773 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:19,773 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:19,773 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:19,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash 26183879, now seen corresponding path program 40 times [2018-11-06 22:51:19,773 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:19,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:19,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:19,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:19,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:20,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:20,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:20,246 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:20,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:51:20,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:51:20,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:20,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1282 backedges. 462 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:20,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:20,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-11-06 22:51:20,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 22:51:20,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 22:51:20,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-11-06 22:51:20,400 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 27 states. [2018-11-06 22:51:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:20,888 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-11-06 22:51:20,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-11-06 22:51:20,888 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 131 [2018-11-06 22:51:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:20,890 INFO L225 Difference]: With dead ends: 145 [2018-11-06 22:51:20,890 INFO L226 Difference]: Without dead ends: 143 [2018-11-06 22:51:20,891 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=904, Invalid=1546, Unknown=0, NotChecked=0, Total=2450 [2018-11-06 22:51:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-11-06 22:51:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2018-11-06 22:51:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-11-06 22:51:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2018-11-06 22:51:20,913 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2018-11-06 22:51:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:20,913 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2018-11-06 22:51:20,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 22:51:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2018-11-06 22:51:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-11-06 22:51:20,914 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:20,914 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:20,915 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:20,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:20,915 INFO L82 PathProgramCache]: Analyzing trace with hash 845550096, now seen corresponding path program 41 times [2018-11-06 22:51:20,915 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:20,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:20,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:20,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:20,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:22,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:22,058 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:22,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:51:22,140 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-11-06 22:51:22,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:22,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 903 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:23,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:23,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2018-11-06 22:51:23,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-11-06 22:51:23,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-11-06 22:51:23,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2018-11-06 22:51:23,002 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand 69 states. [2018-11-06 22:51:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:24,172 INFO L93 Difference]: Finished difference Result 231 states and 233 transitions. [2018-11-06 22:51:24,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-11-06 22:51:24,172 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 135 [2018-11-06 22:51:24,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:24,173 INFO L225 Difference]: With dead ends: 231 [2018-11-06 22:51:24,173 INFO L226 Difference]: Without dead ends: 138 [2018-11-06 22:51:24,174 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1954, Invalid=6418, Unknown=0, NotChecked=0, Total=8372 [2018-11-06 22:51:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-11-06 22:51:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-11-06 22:51:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-11-06 22:51:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2018-11-06 22:51:24,194 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2018-11-06 22:51:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:24,195 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2018-11-06 22:51:24,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-11-06 22:51:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2018-11-06 22:51:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-11-06 22:51:24,195 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:24,195 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:24,195 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:24,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:24,196 INFO L82 PathProgramCache]: Analyzing trace with hash 391178698, now seen corresponding path program 42 times [2018-11-06 22:51:24,196 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:24,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:24,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:24,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:24,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:24,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:24,940 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:24,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:51:25,042 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-11-06 22:51:25,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:25,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1409 backedges. 506 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:25,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:25,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-11-06 22:51:25,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 22:51:25,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 22:51:25,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-11-06 22:51:25,144 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 28 states. [2018-11-06 22:51:25,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:25,623 INFO L93 Difference]: Finished difference Result 151 states and 152 transitions. [2018-11-06 22:51:25,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-11-06 22:51:25,623 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2018-11-06 22:51:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:25,625 INFO L225 Difference]: With dead ends: 151 [2018-11-06 22:51:25,625 INFO L226 Difference]: Without dead ends: 149 [2018-11-06 22:51:25,625 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=979, Invalid=1673, Unknown=0, NotChecked=0, Total=2652 [2018-11-06 22:51:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-11-06 22:51:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2018-11-06 22:51:25,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-11-06 22:51:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2018-11-06 22:51:25,652 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2018-11-06 22:51:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:25,653 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2018-11-06 22:51:25,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 22:51:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2018-11-06 22:51:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-11-06 22:51:25,653 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:25,653 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:25,654 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:25,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:25,654 INFO L82 PathProgramCache]: Analyzing trace with hash -692504173, now seen corresponding path program 43 times [2018-11-06 22:51:25,654 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:25,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:25,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:25,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:25,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:27,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:27,902 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:27,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:27,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1496 backedges. 990 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:28,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:28,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2018-11-06 22:51:28,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-11-06 22:51:28,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-11-06 22:51:28,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:51:28,879 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand 72 states. [2018-11-06 22:51:30,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:30,137 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-11-06 22:51:30,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-11-06 22:51:30,138 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 141 [2018-11-06 22:51:30,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:30,138 INFO L225 Difference]: With dead ends: 241 [2018-11-06 22:51:30,139 INFO L226 Difference]: Without dead ends: 144 [2018-11-06 22:51:30,139 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2123, Invalid=6997, Unknown=0, NotChecked=0, Total=9120 [2018-11-06 22:51:30,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-11-06 22:51:30,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-11-06 22:51:30,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-11-06 22:51:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2018-11-06 22:51:30,161 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2018-11-06 22:51:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:30,162 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2018-11-06 22:51:30,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-11-06 22:51:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2018-11-06 22:51:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-11-06 22:51:30,162 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:30,162 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:30,163 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:30,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1355948595, now seen corresponding path program 44 times [2018-11-06 22:51:30,163 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:30,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:30,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:30,164 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:30,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:30,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:30,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:30,756 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:30,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:51:30,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:51:30,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:30,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1542 backedges. 552 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:31,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:31,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-11-06 22:51:31,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 22:51:31,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 22:51:31,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-11-06 22:51:31,162 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 29 states. [2018-11-06 22:51:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:31,658 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-11-06 22:51:31,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-11-06 22:51:31,659 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 143 [2018-11-06 22:51:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:31,660 INFO L225 Difference]: With dead ends: 157 [2018-11-06 22:51:31,660 INFO L226 Difference]: Without dead ends: 155 [2018-11-06 22:51:31,660 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1057, Invalid=1805, Unknown=0, NotChecked=0, Total=2862 [2018-11-06 22:51:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-11-06 22:51:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 148. [2018-11-06 22:51:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-11-06 22:51:31,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2018-11-06 22:51:31,684 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2018-11-06 22:51:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:31,685 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2018-11-06 22:51:31,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 22:51:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2018-11-06 22:51:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-11-06 22:51:31,685 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:31,685 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:31,686 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:31,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1893305322, now seen corresponding path program 45 times [2018-11-06 22:51:31,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:31,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:31,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:31,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:31,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:32,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:32,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:32,995 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:33,004 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:51:33,088 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-11-06 22:51:33,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:33,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 1081 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:35,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:35,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2018-11-06 22:51:35,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-11-06 22:51:35,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-11-06 22:51:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2018-11-06 22:51:35,175 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand 75 states. [2018-11-06 22:51:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:36,513 INFO L93 Difference]: Finished difference Result 251 states and 253 transitions. [2018-11-06 22:51:36,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-11-06 22:51:36,513 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 147 [2018-11-06 22:51:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:36,514 INFO L225 Difference]: With dead ends: 251 [2018-11-06 22:51:36,514 INFO L226 Difference]: Without dead ends: 150 [2018-11-06 22:51:36,515 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2299, Invalid=7601, Unknown=0, NotChecked=0, Total=9900 [2018-11-06 22:51:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-11-06 22:51:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-11-06 22:51:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-11-06 22:51:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2018-11-06 22:51:36,541 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2018-11-06 22:51:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:36,542 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2018-11-06 22:51:36,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-11-06 22:51:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2018-11-06 22:51:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-11-06 22:51:36,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:36,543 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:36,543 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:36,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:36,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1162246960, now seen corresponding path program 46 times [2018-11-06 22:51:36,544 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:36,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:36,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:36,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:36,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:37,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:37,728 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:37,728 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:37,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:51:37,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:51:37,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:37,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 600 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:37,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:37,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-11-06 22:51:37,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-11-06 22:51:37,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-11-06 22:51:37,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-11-06 22:51:37,870 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 30 states. [2018-11-06 22:51:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:38,425 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2018-11-06 22:51:38,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-11-06 22:51:38,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2018-11-06 22:51:38,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:38,426 INFO L225 Difference]: With dead ends: 163 [2018-11-06 22:51:38,427 INFO L226 Difference]: Without dead ends: 161 [2018-11-06 22:51:38,427 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1138, Invalid=1942, Unknown=0, NotChecked=0, Total=3080 [2018-11-06 22:51:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-11-06 22:51:38,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2018-11-06 22:51:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-11-06 22:51:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2018-11-06 22:51:38,454 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2018-11-06 22:51:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:38,454 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2018-11-06 22:51:38,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-11-06 22:51:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2018-11-06 22:51:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-11-06 22:51:38,454 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:38,455 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:38,455 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:38,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash 246473113, now seen corresponding path program 47 times [2018-11-06 22:51:38,455 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:38,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:38,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:38,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:38,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:40,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:40,344 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:40,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:51:40,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-11-06 22:51:40,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:40,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1776 backedges. 1176 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:41,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:41,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2018-11-06 22:51:41,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-11-06 22:51:41,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-11-06 22:51:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2018-11-06 22:51:41,482 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 78 states. [2018-11-06 22:51:42,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:42,985 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2018-11-06 22:51:42,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-11-06 22:51:42,986 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 153 [2018-11-06 22:51:42,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:42,986 INFO L225 Difference]: With dead ends: 261 [2018-11-06 22:51:42,987 INFO L226 Difference]: Without dead ends: 156 [2018-11-06 22:51:42,987 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2482, Invalid=8230, Unknown=0, NotChecked=0, Total=10712 [2018-11-06 22:51:42,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-11-06 22:51:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-11-06 22:51:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-11-06 22:51:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-11-06 22:51:43,013 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2018-11-06 22:51:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:43,014 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-11-06 22:51:43,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-11-06 22:51:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-11-06 22:51:43,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-11-06 22:51:43,014 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:43,014 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:43,015 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:43,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:43,015 INFO L82 PathProgramCache]: Analyzing trace with hash -755040557, now seen corresponding path program 48 times [2018-11-06 22:51:43,015 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:43,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:43,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:43,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:43,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:43,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:43,611 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:43,620 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:51:43,710 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-11-06 22:51:43,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:43,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 650 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:43,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:43,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-11-06 22:51:43,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 22:51:43,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 22:51:43,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-11-06 22:51:43,812 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 31 states. [2018-11-06 22:51:44,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:44,399 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-11-06 22:51:44,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-11-06 22:51:44,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 155 [2018-11-06 22:51:44,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:44,401 INFO L225 Difference]: With dead ends: 169 [2018-11-06 22:51:44,401 INFO L226 Difference]: Without dead ends: 167 [2018-11-06 22:51:44,401 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1222, Invalid=2084, Unknown=0, NotChecked=0, Total=3306 [2018-11-06 22:51:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-11-06 22:51:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 160. [2018-11-06 22:51:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-11-06 22:51:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2018-11-06 22:51:44,429 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2018-11-06 22:51:44,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:44,430 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2018-11-06 22:51:44,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 22:51:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2018-11-06 22:51:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-11-06 22:51:44,431 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:44,431 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:44,431 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:44,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash 869507612, now seen corresponding path program 49 times [2018-11-06 22:51:44,432 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:44,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:44,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:44,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:44,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:45,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:45,925 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:45,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:46,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1925 backedges. 1275 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:47,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:47,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2018-11-06 22:51:47,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-11-06 22:51:47,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-11-06 22:51:47,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2018-11-06 22:51:47,557 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 81 states. [2018-11-06 22:51:49,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:49,156 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-11-06 22:51:49,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-11-06 22:51:49,156 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 159 [2018-11-06 22:51:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:49,157 INFO L225 Difference]: With dead ends: 271 [2018-11-06 22:51:49,159 INFO L226 Difference]: Without dead ends: 162 [2018-11-06 22:51:49,160 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2672, Invalid=8884, Unknown=0, NotChecked=0, Total=11556 [2018-11-06 22:51:49,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-11-06 22:51:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-11-06 22:51:49,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-11-06 22:51:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2018-11-06 22:51:49,189 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2018-11-06 22:51:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:49,190 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2018-11-06 22:51:49,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-11-06 22:51:49,190 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2018-11-06 22:51:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-11-06 22:51:49,190 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:49,190 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:49,191 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:49,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:49,191 INFO L82 PathProgramCache]: Analyzing trace with hash 377580502, now seen corresponding path program 50 times [2018-11-06 22:51:49,191 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:49,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:49,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:49,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:51:49,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:49,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:49,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:49,745 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:49,756 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:51:49,829 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:51:49,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:49,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 702 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:50,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:50,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-11-06 22:51:50,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-11-06 22:51:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-11-06 22:51:50,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-11-06 22:51:50,305 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 32 states. [2018-11-06 22:51:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:50,927 INFO L93 Difference]: Finished difference Result 175 states and 176 transitions. [2018-11-06 22:51:50,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-11-06 22:51:50,927 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 161 [2018-11-06 22:51:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:50,928 INFO L225 Difference]: With dead ends: 175 [2018-11-06 22:51:50,928 INFO L226 Difference]: Without dead ends: 173 [2018-11-06 22:51:50,929 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1309, Invalid=2231, Unknown=0, NotChecked=0, Total=3540 [2018-11-06 22:51:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-11-06 22:51:50,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2018-11-06 22:51:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-11-06 22:51:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-11-06 22:51:50,960 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2018-11-06 22:51:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:50,960 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-11-06 22:51:50,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-11-06 22:51:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-11-06 22:51:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-11-06 22:51:50,961 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:50,961 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:50,961 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:50,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:50,962 INFO L82 PathProgramCache]: Analyzing trace with hash -427698785, now seen corresponding path program 51 times [2018-11-06 22:51:50,962 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:50,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:50,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:50,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:50,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:52,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:52,011 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:52,020 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:51:52,119 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-11-06 22:51:52,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:52,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1378 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:53,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:53,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2018-11-06 22:51:53,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-06 22:51:53,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-06 22:51:53,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2018-11-06 22:51:53,718 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 84 states. [2018-11-06 22:51:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:55,402 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-11-06 22:51:55,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-11-06 22:51:55,402 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 165 [2018-11-06 22:51:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:55,403 INFO L225 Difference]: With dead ends: 281 [2018-11-06 22:51:55,403 INFO L226 Difference]: Without dead ends: 168 [2018-11-06 22:51:55,404 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2869, Invalid=9563, Unknown=0, NotChecked=0, Total=12432 [2018-11-06 22:51:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-11-06 22:51:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-11-06 22:51:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-11-06 22:51:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2018-11-06 22:51:55,434 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2018-11-06 22:51:55,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:55,434 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2018-11-06 22:51:55,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-06 22:51:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2018-11-06 22:51:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-11-06 22:51:55,435 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:55,435 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:55,435 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:55,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:55,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2026116135, now seen corresponding path program 52 times [2018-11-06 22:51:55,436 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:55,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:55,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:55,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:55,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:55,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:55,920 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:55,930 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:51:55,996 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:51:55,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:56,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 756 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:56,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:56,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-11-06 22:51:56,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-11-06 22:51:56,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-11-06 22:51:56,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-11-06 22:51:56,223 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 33 states. [2018-11-06 22:51:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:51:56,839 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-11-06 22:51:56,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-11-06 22:51:56,840 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 167 [2018-11-06 22:51:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:51:56,841 INFO L225 Difference]: With dead ends: 181 [2018-11-06 22:51:56,841 INFO L226 Difference]: Without dead ends: 179 [2018-11-06 22:51:56,841 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1399, Invalid=2383, Unknown=0, NotChecked=0, Total=3782 [2018-11-06 22:51:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-11-06 22:51:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 172. [2018-11-06 22:51:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-11-06 22:51:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2018-11-06 22:51:56,876 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2018-11-06 22:51:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:51:56,876 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2018-11-06 22:51:56,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-11-06 22:51:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2018-11-06 22:51:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-11-06 22:51:56,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:51:56,878 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-11-06 22:51:56,878 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:51:56,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:51:56,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1982241826, now seen corresponding path program 53 times [2018-11-06 22:51:56,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:51:56,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:51:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:56,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:51:56,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:51:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:51:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:58,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:51:58,335 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:51:58,342 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:51:58,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-11-06 22:51:58,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:51:58,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:51:59,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 1485 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:51:59,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:51:59,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2018-11-06 22:51:59,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-11-06 22:51:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-11-06 22:51:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2018-11-06 22:51:59,752 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand 87 states. [2018-11-06 22:52:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:01,577 INFO L93 Difference]: Finished difference Result 291 states and 293 transitions. [2018-11-06 22:52:01,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-11-06 22:52:01,577 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 171 [2018-11-06 22:52:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:01,578 INFO L225 Difference]: With dead ends: 291 [2018-11-06 22:52:01,578 INFO L226 Difference]: Without dead ends: 174 [2018-11-06 22:52:01,579 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3073, Invalid=10267, Unknown=0, NotChecked=0, Total=13340 [2018-11-06 22:52:01,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-11-06 22:52:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-11-06 22:52:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-11-06 22:52:01,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2018-11-06 22:52:01,611 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2018-11-06 22:52:01,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:01,612 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2018-11-06 22:52:01,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-11-06 22:52:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2018-11-06 22:52:01,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-11-06 22:52:01,612 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:01,613 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:01,613 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:01,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:01,613 INFO L82 PathProgramCache]: Analyzing trace with hash -392061220, now seen corresponding path program 54 times [2018-11-06 22:52:01,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:01,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:01,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:01,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:01,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:02,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:02,082 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:02,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:52:02,186 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-11-06 22:52:02,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:02,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2297 backedges. 812 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:02,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:02,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-11-06 22:52:02,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-11-06 22:52:02,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-11-06 22:52:02,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 22:52:02,262 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 34 states. [2018-11-06 22:52:03,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:03,171 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2018-11-06 22:52:03,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-11-06 22:52:03,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2018-11-06 22:52:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:03,172 INFO L225 Difference]: With dead ends: 187 [2018-11-06 22:52:03,172 INFO L226 Difference]: Without dead ends: 185 [2018-11-06 22:52:03,173 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1492, Invalid=2540, Unknown=0, NotChecked=0, Total=4032 [2018-11-06 22:52:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-11-06 22:52:03,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 178. [2018-11-06 22:52:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-11-06 22:52:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2018-11-06 22:52:03,219 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2018-11-06 22:52:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:03,220 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2018-11-06 22:52:03,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-11-06 22:52:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2018-11-06 22:52:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-06 22:52:03,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:03,221 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:03,221 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:03,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 2007307685, now seen corresponding path program 55 times [2018-11-06 22:52:03,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:03,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:03,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:03,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:03,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:04,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:04,443 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:04,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:04,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:04,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 1596 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:05,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:05,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2018-11-06 22:52:05,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-11-06 22:52:05,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-11-06 22:52:05,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1859, Invalid=6151, Unknown=0, NotChecked=0, Total=8010 [2018-11-06 22:52:05,957 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 90 states. [2018-11-06 22:52:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:07,390 INFO L93 Difference]: Finished difference Result 301 states and 303 transitions. [2018-11-06 22:52:07,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-11-06 22:52:07,391 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 177 [2018-11-06 22:52:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:07,391 INFO L225 Difference]: With dead ends: 301 [2018-11-06 22:52:07,392 INFO L226 Difference]: Without dead ends: 180 [2018-11-06 22:52:07,392 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2871 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3284, Invalid=10996, Unknown=0, NotChecked=0, Total=14280 [2018-11-06 22:52:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-11-06 22:52:07,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2018-11-06 22:52:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-11-06 22:52:07,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2018-11-06 22:52:07,435 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2018-11-06 22:52:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:07,435 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2018-11-06 22:52:07,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-11-06 22:52:07,435 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2018-11-06 22:52:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2018-11-06 22:52:07,436 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:07,436 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:07,437 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:07,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:07,437 INFO L82 PathProgramCache]: Analyzing trace with hash 496870623, now seen corresponding path program 56 times [2018-11-06 22:52:07,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:07,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:07,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:07,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:07,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:08,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:08,278 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:08,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:52:08,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:52:08,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:08,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2466 backedges. 870 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:08,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:08,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-11-06 22:52:08,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 22:52:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 22:52:08,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 22:52:08,454 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 35 states. [2018-11-06 22:52:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:09,174 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-11-06 22:52:09,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-06 22:52:09,174 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 179 [2018-11-06 22:52:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:09,175 INFO L225 Difference]: With dead ends: 193 [2018-11-06 22:52:09,175 INFO L226 Difference]: Without dead ends: 191 [2018-11-06 22:52:09,179 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1588, Invalid=2702, Unknown=0, NotChecked=0, Total=4290 [2018-11-06 22:52:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-11-06 22:52:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2018-11-06 22:52:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-11-06 22:52:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2018-11-06 22:52:09,225 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2018-11-06 22:52:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:09,225 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2018-11-06 22:52:09,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 22:52:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2018-11-06 22:52:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-11-06 22:52:09,227 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:09,227 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:09,227 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:09,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash 592994856, now seen corresponding path program 57 times [2018-11-06 22:52:09,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:09,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:09,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:09,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:09,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:10,576 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:10,576 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:10,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:52:10,691 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-11-06 22:52:10,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:10,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2581 backedges. 1711 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:12,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:12,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 93 [2018-11-06 22:52:12,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-11-06 22:52:12,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-11-06 22:52:12,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1983, Invalid=6573, Unknown=0, NotChecked=0, Total=8556 [2018-11-06 22:52:12,176 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 93 states. [2018-11-06 22:52:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:14,574 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2018-11-06 22:52:14,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-06 22:52:14,574 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 183 [2018-11-06 22:52:14,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:14,575 INFO L225 Difference]: With dead ends: 311 [2018-11-06 22:52:14,575 INFO L226 Difference]: Without dead ends: 186 [2018-11-06 22:52:14,576 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3502, Invalid=11750, Unknown=0, NotChecked=0, Total=15252 [2018-11-06 22:52:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-11-06 22:52:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-11-06 22:52:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-11-06 22:52:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2018-11-06 22:52:14,621 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2018-11-06 22:52:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:14,621 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2018-11-06 22:52:14,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-11-06 22:52:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2018-11-06 22:52:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2018-11-06 22:52:14,622 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:14,622 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:14,622 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:14,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:14,622 INFO L82 PathProgramCache]: Analyzing trace with hash 110304738, now seen corresponding path program 58 times [2018-11-06 22:52:14,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:14,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:14,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:14,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:14,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:15,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:15,216 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:15,226 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:52:15,303 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:52:15,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:15,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 930 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:15,383 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:15,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-11-06 22:52:15,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-11-06 22:52:15,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-11-06 22:52:15,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-11-06 22:52:15,385 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 36 states. [2018-11-06 22:52:16,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:16,096 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2018-11-06 22:52:16,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-11-06 22:52:16,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 185 [2018-11-06 22:52:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:16,097 INFO L225 Difference]: With dead ends: 199 [2018-11-06 22:52:16,097 INFO L226 Difference]: Without dead ends: 197 [2018-11-06 22:52:16,098 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1687, Invalid=2869, Unknown=0, NotChecked=0, Total=4556 [2018-11-06 22:52:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-11-06 22:52:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2018-11-06 22:52:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-11-06 22:52:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2018-11-06 22:52:16,137 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2018-11-06 22:52:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:16,137 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2018-11-06 22:52:16,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-11-06 22:52:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2018-11-06 22:52:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2018-11-06 22:52:16,138 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:16,138 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:16,138 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:16,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:16,138 INFO L82 PathProgramCache]: Analyzing trace with hash 856924587, now seen corresponding path program 59 times [2018-11-06 22:52:16,138 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:16,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:16,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:16,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:16,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:17,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:17,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:17,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:52:17,620 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-11-06 22:52:17,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:17,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2760 backedges. 1830 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:19,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:19,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 96 [2018-11-06 22:52:19,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-11-06 22:52:19,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-11-06 22:52:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2111, Invalid=7009, Unknown=0, NotChecked=0, Total=9120 [2018-11-06 22:52:19,520 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 96 states. [2018-11-06 22:52:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:21,145 INFO L93 Difference]: Finished difference Result 321 states and 323 transitions. [2018-11-06 22:52:21,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-11-06 22:52:21,145 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 189 [2018-11-06 22:52:21,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:21,146 INFO L225 Difference]: With dead ends: 321 [2018-11-06 22:52:21,146 INFO L226 Difference]: Without dead ends: 192 [2018-11-06 22:52:21,147 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3727, Invalid=12529, Unknown=0, NotChecked=0, Total=16256 [2018-11-06 22:52:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-11-06 22:52:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-11-06 22:52:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-11-06 22:52:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2018-11-06 22:52:21,193 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2018-11-06 22:52:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:21,193 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2018-11-06 22:52:21,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-11-06 22:52:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2018-11-06 22:52:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-11-06 22:52:21,195 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:21,195 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:21,195 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:21,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -547542555, now seen corresponding path program 60 times [2018-11-06 22:52:21,195 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:21,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:21,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:21,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:21,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:21,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:21,798 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:21,808 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:52:21,916 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-11-06 22:52:21,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:21,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 992 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:22,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:22,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-11-06 22:52:22,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-11-06 22:52:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-11-06 22:52:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-11-06 22:52:22,010 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 37 states. [2018-11-06 22:52:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:22,725 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-11-06 22:52:22,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-11-06 22:52:22,725 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 191 [2018-11-06 22:52:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:22,727 INFO L225 Difference]: With dead ends: 205 [2018-11-06 22:52:22,727 INFO L226 Difference]: Without dead ends: 203 [2018-11-06 22:52:22,728 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1789, Invalid=3041, Unknown=0, NotChecked=0, Total=4830 [2018-11-06 22:52:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-11-06 22:52:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2018-11-06 22:52:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-11-06 22:52:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2018-11-06 22:52:22,774 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2018-11-06 22:52:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:22,774 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2018-11-06 22:52:22,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-11-06 22:52:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2018-11-06 22:52:22,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-11-06 22:52:22,775 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:22,775 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:22,775 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:22,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:22,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1075967022, now seen corresponding path program 61 times [2018-11-06 22:52:22,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:22,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:22,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:22,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:22,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:24,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:24,463 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:24,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:24,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:24,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2945 backedges. 1953 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:26,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:26,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 99 [2018-11-06 22:52:26,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-11-06 22:52:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-11-06 22:52:26,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=7459, Unknown=0, NotChecked=0, Total=9702 [2018-11-06 22:52:26,252 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 99 states. [2018-11-06 22:52:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:28,691 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-11-06 22:52:28,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-06 22:52:28,692 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 195 [2018-11-06 22:52:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:28,692 INFO L225 Difference]: With dead ends: 331 [2018-11-06 22:52:28,693 INFO L226 Difference]: Without dead ends: 198 [2018-11-06 22:52:28,694 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3504 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-11-06 22:52:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-11-06 22:52:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-11-06 22:52:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-11-06 22:52:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2018-11-06 22:52:28,737 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2018-11-06 22:52:28,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:28,737 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2018-11-06 22:52:28,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-11-06 22:52:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2018-11-06 22:52:28,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-11-06 22:52:28,738 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:28,738 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:28,739 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:28,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash 491710696, now seen corresponding path program 62 times [2018-11-06 22:52:28,739 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:28,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:28,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:28,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:29,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:29,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:29,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:52:29,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:52:29,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:29,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3009 backedges. 1056 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:29,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:29,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-11-06 22:52:29,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-11-06 22:52:29,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-11-06 22:52:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-11-06 22:52:29,519 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 38 states. [2018-11-06 22:52:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:30,288 INFO L93 Difference]: Finished difference Result 211 states and 212 transitions. [2018-11-06 22:52:30,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-11-06 22:52:30,289 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 197 [2018-11-06 22:52:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:30,290 INFO L225 Difference]: With dead ends: 211 [2018-11-06 22:52:30,290 INFO L226 Difference]: Without dead ends: 209 [2018-11-06 22:52:30,291 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1894, Invalid=3218, Unknown=0, NotChecked=0, Total=5112 [2018-11-06 22:52:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-11-06 22:52:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 202. [2018-11-06 22:52:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-11-06 22:52:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2018-11-06 22:52:30,330 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2018-11-06 22:52:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:30,331 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2018-11-06 22:52:30,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-11-06 22:52:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2018-11-06 22:52:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2018-11-06 22:52:30,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:30,332 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:30,332 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:30,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:30,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1589216847, now seen corresponding path program 63 times [2018-11-06 22:52:30,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:30,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:30,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:30,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:30,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:31,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:31,805 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:31,815 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:52:31,937 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-11-06 22:52:31,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:31,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 2080 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:34,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:34,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 102 [2018-11-06 22:52:34,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-11-06 22:52:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-11-06 22:52:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2379, Invalid=7923, Unknown=0, NotChecked=0, Total=10302 [2018-11-06 22:52:34,094 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 102 states. [2018-11-06 22:52:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:36,525 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-11-06 22:52:36,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-11-06 22:52:36,525 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 201 [2018-11-06 22:52:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:36,526 INFO L225 Difference]: With dead ends: 341 [2018-11-06 22:52:36,526 INFO L226 Difference]: Without dead ends: 204 [2018-11-06 22:52:36,527 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3729 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4198, Invalid=14162, Unknown=0, NotChecked=0, Total=18360 [2018-11-06 22:52:36,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-11-06 22:52:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2018-11-06 22:52:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-11-06 22:52:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-11-06 22:52:36,570 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2018-11-06 22:52:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:36,570 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-11-06 22:52:36,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-11-06 22:52:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-11-06 22:52:36,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-11-06 22:52:36,571 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:36,571 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:36,571 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:36,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:36,572 INFO L82 PathProgramCache]: Analyzing trace with hash -852264213, now seen corresponding path program 64 times [2018-11-06 22:52:36,572 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:36,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:36,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:36,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:36,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:37,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:37,141 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:37,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:52:37,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:52:37,235 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:37,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1122 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:37,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:37,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-11-06 22:52:37,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-11-06 22:52:37,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-11-06 22:52:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-11-06 22:52:37,575 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 39 states. [2018-11-06 22:52:38,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:38,385 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-11-06 22:52:38,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-11-06 22:52:38,386 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 203 [2018-11-06 22:52:38,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:38,387 INFO L225 Difference]: With dead ends: 217 [2018-11-06 22:52:38,387 INFO L226 Difference]: Without dead ends: 215 [2018-11-06 22:52:38,388 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2002, Invalid=3400, Unknown=0, NotChecked=0, Total=5402 [2018-11-06 22:52:38,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-11-06 22:52:38,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 208. [2018-11-06 22:52:38,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-11-06 22:52:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2018-11-06 22:52:38,438 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2018-11-06 22:52:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:38,438 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2018-11-06 22:52:38,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-11-06 22:52:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2018-11-06 22:52:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-11-06 22:52:38,439 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:38,439 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:38,439 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:38,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash -927182284, now seen corresponding path program 65 times [2018-11-06 22:52:38,439 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:38,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:38,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:38,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:38,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:40,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:40,247 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:40,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:52:40,386 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-11-06 22:52:40,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:40,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3333 backedges. 2211 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:42,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:42,211 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 105 [2018-11-06 22:52:42,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-11-06 22:52:42,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-11-06 22:52:42,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2519, Invalid=8401, Unknown=0, NotChecked=0, Total=10920 [2018-11-06 22:52:42,213 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 105 states. [2018-11-06 22:52:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:45,049 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2018-11-06 22:52:45,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-11-06 22:52:45,050 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 207 [2018-11-06 22:52:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:45,050 INFO L225 Difference]: With dead ends: 351 [2018-11-06 22:52:45,051 INFO L226 Difference]: Without dead ends: 210 [2018-11-06 22:52:45,051 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3961 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4444, Invalid=15016, Unknown=0, NotChecked=0, Total=19460 [2018-11-06 22:52:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-11-06 22:52:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-11-06 22:52:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-11-06 22:52:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2018-11-06 22:52:45,098 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2018-11-06 22:52:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:45,098 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2018-11-06 22:52:45,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-11-06 22:52:45,098 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2018-11-06 22:52:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-11-06 22:52:45,099 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:45,099 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:45,099 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:45,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:45,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1900937198, now seen corresponding path program 66 times [2018-11-06 22:52:45,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:45,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:45,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:45,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:45,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:45,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:45,709 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:45,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:52:45,844 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-11-06 22:52:45,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:45,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 1190 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:45,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:45,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-11-06 22:52:45,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-11-06 22:52:45,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-11-06 22:52:45,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-11-06 22:52:45,950 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand 40 states. [2018-11-06 22:52:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:46,791 INFO L93 Difference]: Finished difference Result 223 states and 224 transitions. [2018-11-06 22:52:46,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-11-06 22:52:46,792 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 209 [2018-11-06 22:52:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:46,793 INFO L225 Difference]: With dead ends: 223 [2018-11-06 22:52:46,793 INFO L226 Difference]: Without dead ends: 221 [2018-11-06 22:52:46,794 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2113, Invalid=3587, Unknown=0, NotChecked=0, Total=5700 [2018-11-06 22:52:46,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-11-06 22:52:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2018-11-06 22:52:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-11-06 22:52:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-11-06 22:52:46,852 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2018-11-06 22:52:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:46,852 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-11-06 22:52:46,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-11-06 22:52:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-11-06 22:52:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-11-06 22:52:46,853 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:46,854 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:46,854 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:46,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:46,854 INFO L82 PathProgramCache]: Analyzing trace with hash 574004663, now seen corresponding path program 67 times [2018-11-06 22:52:46,854 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:46,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:46,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:46,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:46,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:48,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:48,560 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:48,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:48,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 2346 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:50,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:50,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 108 [2018-11-06 22:52:50,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-11-06 22:52:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-11-06 22:52:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2663, Invalid=8893, Unknown=0, NotChecked=0, Total=11556 [2018-11-06 22:52:50,773 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 108 states. [2018-11-06 22:52:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:53,578 INFO L93 Difference]: Finished difference Result 361 states and 363 transitions. [2018-11-06 22:52:53,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-11-06 22:52:53,578 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 213 [2018-11-06 22:52:53,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:53,579 INFO L225 Difference]: With dead ends: 361 [2018-11-06 22:52:53,579 INFO L226 Difference]: Without dead ends: 216 [2018-11-06 22:52:53,580 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4200 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4697, Invalid=15895, Unknown=0, NotChecked=0, Total=20592 [2018-11-06 22:52:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-11-06 22:52:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-11-06 22:52:53,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-11-06 22:52:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2018-11-06 22:52:53,629 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2018-11-06 22:52:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:53,629 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2018-11-06 22:52:53,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-11-06 22:52:53,629 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2018-11-06 22:52:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-11-06 22:52:53,630 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:53,630 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:53,631 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:53,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707121, now seen corresponding path program 68 times [2018-11-06 22:52:53,631 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:53,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:53,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:53,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:52:53,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:54,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:54,595 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:54,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:52:54,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:52:54,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:54,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:52:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3606 backedges. 1260 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:54,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:52:54,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-11-06 22:52:54,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-11-06 22:52:54,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-11-06 22:52:54,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-11-06 22:52:54,813 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 41 states. [2018-11-06 22:52:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:52:55,679 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-11-06 22:52:55,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-11-06 22:52:55,680 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 215 [2018-11-06 22:52:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:52:55,680 INFO L225 Difference]: With dead ends: 229 [2018-11-06 22:52:55,681 INFO L226 Difference]: Without dead ends: 227 [2018-11-06 22:52:55,681 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2227, Invalid=3779, Unknown=0, NotChecked=0, Total=6006 [2018-11-06 22:52:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-11-06 22:52:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2018-11-06 22:52:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-11-06 22:52:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2018-11-06 22:52:55,733 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2018-11-06 22:52:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:52:55,734 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2018-11-06 22:52:55,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-11-06 22:52:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2018-11-06 22:52:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-11-06 22:52:55,735 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:52:55,735 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-11-06 22:52:55,735 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:52:55,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:52:55,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1893760058, now seen corresponding path program 69 times [2018-11-06 22:52:55,736 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:52:55,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:52:55,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:55,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:52:55,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:52:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:52:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:52:57,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:52:57,530 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:52:57,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:52:57,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-11-06 22:52:57,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:52:57,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3745 backedges. 2485 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:00,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:00,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 111 [2018-11-06 22:53:00,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-11-06 22:53:00,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-11-06 22:53:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2811, Invalid=9399, Unknown=0, NotChecked=0, Total=12210 [2018-11-06 22:53:00,082 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand 111 states. [2018-11-06 22:53:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:03,047 INFO L93 Difference]: Finished difference Result 371 states and 373 transitions. [2018-11-06 22:53:03,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-11-06 22:53:03,047 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 219 [2018-11-06 22:53:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:03,048 INFO L225 Difference]: With dead ends: 371 [2018-11-06 22:53:03,048 INFO L226 Difference]: Without dead ends: 222 [2018-11-06 22:53:03,050 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4446 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4957, Invalid=16799, Unknown=0, NotChecked=0, Total=21756 [2018-11-06 22:53:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-11-06 22:53:03,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2018-11-06 22:53:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2018-11-06 22:53:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2018-11-06 22:53:03,099 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2018-11-06 22:53:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:03,099 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2018-11-06 22:53:03,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-11-06 22:53:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2018-11-06 22:53:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2018-11-06 22:53:03,100 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:03,100 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:03,100 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:03,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:03,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1635163404, now seen corresponding path program 70 times [2018-11-06 22:53:03,101 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:03,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:03,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:03,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:03,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:03,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:03,816 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:03,825 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:53:03,920 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:53:03,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:03,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3817 backedges. 1332 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:04,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:04,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-11-06 22:53:04,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-11-06 22:53:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-11-06 22:53:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-11-06 22:53:04,108 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 42 states. [2018-11-06 22:53:05,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:05,131 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2018-11-06 22:53:05,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-11-06 22:53:05,131 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2018-11-06 22:53:05,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:05,132 INFO L225 Difference]: With dead ends: 235 [2018-11-06 22:53:05,132 INFO L226 Difference]: Without dead ends: 233 [2018-11-06 22:53:05,132 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2344, Invalid=3976, Unknown=0, NotChecked=0, Total=6320 [2018-11-06 22:53:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-11-06 22:53:05,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2018-11-06 22:53:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-11-06 22:53:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2018-11-06 22:53:05,187 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2018-11-06 22:53:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:05,187 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2018-11-06 22:53:05,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-11-06 22:53:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2018-11-06 22:53:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2018-11-06 22:53:05,188 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:05,188 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:05,188 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:05,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1386410563, now seen corresponding path program 71 times [2018-11-06 22:53:05,189 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:05,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:05,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:05,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:05,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:07,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:07,498 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:07,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:53:07,658 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-11-06 22:53:07,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:07,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 2628 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:10,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:10,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 114 [2018-11-06 22:53:10,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-11-06 22:53:10,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-11-06 22:53:10,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2963, Invalid=9919, Unknown=0, NotChecked=0, Total=12882 [2018-11-06 22:53:10,053 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand 114 states. [2018-11-06 22:53:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:13,179 INFO L93 Difference]: Finished difference Result 381 states and 383 transitions. [2018-11-06 22:53:13,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-11-06 22:53:13,179 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 225 [2018-11-06 22:53:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:13,180 INFO L225 Difference]: With dead ends: 381 [2018-11-06 22:53:13,180 INFO L226 Difference]: Without dead ends: 228 [2018-11-06 22:53:13,181 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4699 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5224, Invalid=17728, Unknown=0, NotChecked=0, Total=22952 [2018-11-06 22:53:13,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-11-06 22:53:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-11-06 22:53:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-11-06 22:53:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2018-11-06 22:53:13,241 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2018-11-06 22:53:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:13,242 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2018-11-06 22:53:13,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-11-06 22:53:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2018-11-06 22:53:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-11-06 22:53:13,243 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:13,243 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:13,243 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:13,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1166573815, now seen corresponding path program 72 times [2018-11-06 22:53:13,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:13,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:13,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:13,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:13,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:13,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:13,974 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:13,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:53:14,127 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-11-06 22:53:14,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:14,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4034 backedges. 1406 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:14,237 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:14,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-11-06 22:53:14,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-11-06 22:53:14,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-11-06 22:53:14,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-11-06 22:53:14,238 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand 43 states. [2018-11-06 22:53:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:15,336 INFO L93 Difference]: Finished difference Result 241 states and 242 transitions. [2018-11-06 22:53:15,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-11-06 22:53:15,337 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 227 [2018-11-06 22:53:15,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:15,337 INFO L225 Difference]: With dead ends: 241 [2018-11-06 22:53:15,338 INFO L226 Difference]: Without dead ends: 239 [2018-11-06 22:53:15,338 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2464, Invalid=4178, Unknown=0, NotChecked=0, Total=6642 [2018-11-06 22:53:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-11-06 22:53:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 232. [2018-11-06 22:53:15,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-11-06 22:53:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2018-11-06 22:53:15,395 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2018-11-06 22:53:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:15,395 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2018-11-06 22:53:15,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-11-06 22:53:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2018-11-06 22:53:15,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-11-06 22:53:15,396 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:15,396 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:15,396 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:15,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:15,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1674015296, now seen corresponding path program 73 times [2018-11-06 22:53:15,397 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:15,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:15,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:15,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:15,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:17,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:17,406 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:17,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:17,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4181 backedges. 2775 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:20,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:20,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 117 [2018-11-06 22:53:20,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-11-06 22:53:20,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-11-06 22:53:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3119, Invalid=10453, Unknown=0, NotChecked=0, Total=13572 [2018-11-06 22:53:20,128 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand 117 states. [2018-11-06 22:53:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:23,410 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-11-06 22:53:23,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-11-06 22:53:23,411 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 231 [2018-11-06 22:53:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:23,412 INFO L225 Difference]: With dead ends: 391 [2018-11-06 22:53:23,412 INFO L226 Difference]: Without dead ends: 234 [2018-11-06 22:53:23,413 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5498, Invalid=18682, Unknown=0, NotChecked=0, Total=24180 [2018-11-06 22:53:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-11-06 22:53:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2018-11-06 22:53:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2018-11-06 22:53:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2018-11-06 22:53:23,478 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2018-11-06 22:53:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:23,478 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2018-11-06 22:53:23,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-11-06 22:53:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2018-11-06 22:53:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-11-06 22:53:23,479 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:23,479 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:23,479 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:23,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1484395002, now seen corresponding path program 74 times [2018-11-06 22:53:23,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:23,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:23,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:23,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:23,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:24,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:24,263 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:24,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:53:24,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:53:24,369 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:24,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 1482 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:24,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:24,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-11-06 22:53:24,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-11-06 22:53:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-11-06 22:53:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-11-06 22:53:24,481 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 44 states. [2018-11-06 22:53:25,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:25,704 INFO L93 Difference]: Finished difference Result 247 states and 248 transitions. [2018-11-06 22:53:25,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-11-06 22:53:25,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 233 [2018-11-06 22:53:25,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:25,705 INFO L225 Difference]: With dead ends: 247 [2018-11-06 22:53:25,705 INFO L226 Difference]: Without dead ends: 245 [2018-11-06 22:53:25,706 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2587, Invalid=4385, Unknown=0, NotChecked=0, Total=6972 [2018-11-06 22:53:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-11-06 22:53:25,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2018-11-06 22:53:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-11-06 22:53:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2018-11-06 22:53:25,766 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2018-11-06 22:53:25,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:25,766 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2018-11-06 22:53:25,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-11-06 22:53:25,766 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2018-11-06 22:53:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-11-06 22:53:25,767 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:25,767 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:25,767 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:25,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:25,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1850553917, now seen corresponding path program 75 times [2018-11-06 22:53:25,768 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:25,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:25,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:25,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:27,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:27,772 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:27,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:53:27,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-11-06 22:53:27,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:27,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 2926 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:30,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:30,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 120 [2018-11-06 22:53:30,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-11-06 22:53:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-11-06 22:53:30,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3279, Invalid=11001, Unknown=0, NotChecked=0, Total=14280 [2018-11-06 22:53:30,593 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand 120 states. [2018-11-06 22:53:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:32,479 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-11-06 22:53:32,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-11-06 22:53:32,479 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 237 [2018-11-06 22:53:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:32,480 INFO L225 Difference]: With dead ends: 401 [2018-11-06 22:53:32,480 INFO L226 Difference]: Without dead ends: 240 [2018-11-06 22:53:32,482 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5226 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5779, Invalid=19661, Unknown=0, NotChecked=0, Total=25440 [2018-11-06 22:53:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-11-06 22:53:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2018-11-06 22:53:32,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-11-06 22:53:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2018-11-06 22:53:32,538 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2018-11-06 22:53:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:32,538 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2018-11-06 22:53:32,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-11-06 22:53:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2018-11-06 22:53:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2018-11-06 22:53:32,539 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:32,539 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:32,540 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:32,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:32,540 INFO L82 PathProgramCache]: Analyzing trace with hash 653866493, now seen corresponding path program 76 times [2018-11-06 22:53:32,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:32,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:32,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:32,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:32,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:33,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:33,601 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:33,609 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:53:33,715 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:53:33,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:33,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1560 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:33,828 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:33,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-11-06 22:53:33,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-11-06 22:53:33,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-11-06 22:53:33,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-11-06 22:53:33,829 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 45 states. [2018-11-06 22:53:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:35,142 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2018-11-06 22:53:35,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-11-06 22:53:35,142 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 239 [2018-11-06 22:53:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:35,143 INFO L225 Difference]: With dead ends: 253 [2018-11-06 22:53:35,143 INFO L226 Difference]: Without dead ends: 251 [2018-11-06 22:53:35,144 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2713, Invalid=4597, Unknown=0, NotChecked=0, Total=7310 [2018-11-06 22:53:35,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-11-06 22:53:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 244. [2018-11-06 22:53:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-11-06 22:53:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2018-11-06 22:53:35,206 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2018-11-06 22:53:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:35,206 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2018-11-06 22:53:35,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-11-06 22:53:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2018-11-06 22:53:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-11-06 22:53:35,207 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:35,207 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:35,207 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:35,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash 69874758, now seen corresponding path program 77 times [2018-11-06 22:53:35,207 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:35,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:35,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:35,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:37,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:37,300 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:37,308 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:53:37,456 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-11-06 22:53:37,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:37,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4641 backedges. 3081 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:40,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:40,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 123 [2018-11-06 22:53:40,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-11-06 22:53:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-11-06 22:53:40,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3443, Invalid=11563, Unknown=0, NotChecked=0, Total=15006 [2018-11-06 22:53:40,389 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand 123 states. [2018-11-06 22:53:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:43,138 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-11-06 22:53:43,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-11-06 22:53:43,138 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 243 [2018-11-06 22:53:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:43,139 INFO L225 Difference]: With dead ends: 411 [2018-11-06 22:53:43,139 INFO L226 Difference]: Without dead ends: 246 [2018-11-06 22:53:43,140 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5500 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=6067, Invalid=20665, Unknown=0, NotChecked=0, Total=26732 [2018-11-06 22:53:43,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-11-06 22:53:43,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-11-06 22:53:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-11-06 22:53:43,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2018-11-06 22:53:43,204 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 243 [2018-11-06 22:53:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:43,204 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2018-11-06 22:53:43,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-11-06 22:53:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2018-11-06 22:53:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-11-06 22:53:43,205 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:43,205 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:43,205 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:43,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash 706284800, now seen corresponding path program 78 times [2018-11-06 22:53:43,206 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:43,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:43,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:43,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:43,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:44,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:44,025 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:44,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:53:44,190 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-11-06 22:53:44,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:44,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4721 backedges. 1640 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:44,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:44,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-11-06 22:53:44,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-11-06 22:53:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-11-06 22:53:44,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-11-06 22:53:44,302 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand 46 states. [2018-11-06 22:53:45,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:45,628 INFO L93 Difference]: Finished difference Result 259 states and 260 transitions. [2018-11-06 22:53:45,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-11-06 22:53:45,629 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 245 [2018-11-06 22:53:45,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:45,630 INFO L225 Difference]: With dead ends: 259 [2018-11-06 22:53:45,630 INFO L226 Difference]: Without dead ends: 257 [2018-11-06 22:53:45,631 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2842, Invalid=4814, Unknown=0, NotChecked=0, Total=7656 [2018-11-06 22:53:45,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-11-06 22:53:45,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 250. [2018-11-06 22:53:45,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-11-06 22:53:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2018-11-06 22:53:45,692 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2018-11-06 22:53:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:45,693 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2018-11-06 22:53:45,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-11-06 22:53:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2018-11-06 22:53:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2018-11-06 22:53:45,694 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:45,694 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:45,694 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:45,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:45,694 INFO L82 PathProgramCache]: Analyzing trace with hash 900780489, now seen corresponding path program 79 times [2018-11-06 22:53:45,694 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:45,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:45,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:45,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:45,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:47,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:47,904 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:47,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:48,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4880 backedges. 3240 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:50,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:50,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 126 [2018-11-06 22:53:50,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-11-06 22:53:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-11-06 22:53:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3611, Invalid=12139, Unknown=0, NotChecked=0, Total=15750 [2018-11-06 22:53:50,917 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand 126 states. [2018-11-06 22:53:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:53,832 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2018-11-06 22:53:53,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-11-06 22:53:53,832 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 249 [2018-11-06 22:53:53,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:53,833 INFO L225 Difference]: With dead ends: 421 [2018-11-06 22:53:53,833 INFO L226 Difference]: Without dead ends: 252 [2018-11-06 22:53:53,834 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5781 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=6362, Invalid=21694, Unknown=0, NotChecked=0, Total=28056 [2018-11-06 22:53:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-11-06 22:53:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2018-11-06 22:53:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-11-06 22:53:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-11-06 22:53:53,896 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 249 [2018-11-06 22:53:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:53,896 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-11-06 22:53:53,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-11-06 22:53:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-11-06 22:53:53,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-11-06 22:53:53,897 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:53,897 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:53,897 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:53,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1650767619, now seen corresponding path program 80 times [2018-11-06 22:53:53,898 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:53,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:53,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:53,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:53:53,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:54,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:54,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:54,793 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:53:54,898 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:53:54,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:54,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:53:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 1722 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:55,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:53:55,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-11-06 22:53:55,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-11-06 22:53:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-11-06 22:53:55,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-11-06 22:53:55,078 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 47 states. [2018-11-06 22:53:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:53:56,413 INFO L93 Difference]: Finished difference Result 265 states and 266 transitions. [2018-11-06 22:53:56,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-11-06 22:53:56,413 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 251 [2018-11-06 22:53:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:53:56,414 INFO L225 Difference]: With dead ends: 265 [2018-11-06 22:53:56,414 INFO L226 Difference]: Without dead ends: 263 [2018-11-06 22:53:56,415 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2974, Invalid=5036, Unknown=0, NotChecked=0, Total=8010 [2018-11-06 22:53:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-11-06 22:53:56,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 256. [2018-11-06 22:53:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-11-06 22:53:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2018-11-06 22:53:56,484 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2018-11-06 22:53:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:53:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2018-11-06 22:53:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-11-06 22:53:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2018-11-06 22:53:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-11-06 22:53:56,485 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:53:56,485 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-11-06 22:53:56,485 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:53:56,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:53:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1404976564, now seen corresponding path program 81 times [2018-11-06 22:53:56,486 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:53:56,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:53:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:56,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:53:56,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:53:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:53:58,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:53:58,770 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:53:58,770 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:53:58,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:53:58,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-11-06 22:53:58,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:53:58,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5125 backedges. 3403 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:02,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:02,049 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 129 [2018-11-06 22:54:02,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-11-06 22:54:02,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-11-06 22:54:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3783, Invalid=12729, Unknown=0, NotChecked=0, Total=16512 [2018-11-06 22:54:02,050 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand 129 states. [2018-11-06 22:54:05,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:05,118 INFO L93 Difference]: Finished difference Result 431 states and 433 transitions. [2018-11-06 22:54:05,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-11-06 22:54:05,118 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 255 [2018-11-06 22:54:05,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:05,120 INFO L225 Difference]: With dead ends: 431 [2018-11-06 22:54:05,120 INFO L226 Difference]: Without dead ends: 258 [2018-11-06 22:54:05,121 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6069 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6664, Invalid=22748, Unknown=0, NotChecked=0, Total=29412 [2018-11-06 22:54:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-11-06 22:54:05,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-11-06 22:54:05,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-11-06 22:54:05,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2018-11-06 22:54:05,198 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 255 [2018-11-06 22:54:05,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:05,198 INFO L480 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2018-11-06 22:54:05,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-11-06 22:54:05,199 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2018-11-06 22:54:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-11-06 22:54:05,199 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:05,200 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:05,200 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:05,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash 903828486, now seen corresponding path program 82 times [2018-11-06 22:54:05,200 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:05,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:05,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:05,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:05,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:06,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:06,404 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:54:06,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:54:06,523 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:54:06,523 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:06,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5209 backedges. 1806 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:06,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:06,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-11-06 22:54:06,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-11-06 22:54:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-11-06 22:54:06,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-11-06 22:54:06,639 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 48 states. [2018-11-06 22:54:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:07,823 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2018-11-06 22:54:07,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-11-06 22:54:07,824 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 257 [2018-11-06 22:54:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:07,825 INFO L225 Difference]: With dead ends: 271 [2018-11-06 22:54:07,825 INFO L226 Difference]: Without dead ends: 269 [2018-11-06 22:54:07,825 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1977 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3109, Invalid=5263, Unknown=0, NotChecked=0, Total=8372 [2018-11-06 22:54:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-11-06 22:54:07,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 262. [2018-11-06 22:54:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-11-06 22:54:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-11-06 22:54:07,911 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2018-11-06 22:54:07,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:54:07,911 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-11-06 22:54:07,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-11-06 22:54:07,911 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-11-06 22:54:07,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-11-06 22:54:07,912 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:54:07,912 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-11-06 22:54:07,913 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:54:07,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:54:07,913 INFO L82 PathProgramCache]: Analyzing trace with hash -682613297, now seen corresponding path program 83 times [2018-11-06 22:54:07,913 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:54:07,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:54:07,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:07,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:54:07,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:54:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:54:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:10,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:54:10,346 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:54:10,355 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:54:10,528 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-11-06 22:54:10,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:54:10,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:54:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5376 backedges. 3570 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:54:13,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:54:13,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 132 [2018-11-06 22:54:13,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-11-06 22:54:13,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-11-06 22:54:13,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3959, Invalid=13333, Unknown=0, NotChecked=0, Total=17292 [2018-11-06 22:54:13,730 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 132 states. [2018-11-06 22:54:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:54:17,230 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2018-11-06 22:54:17,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-11-06 22:54:17,230 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 261 [2018-11-06 22:54:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:54:17,231 INFO L225 Difference]: With dead ends: 441 [2018-11-06 22:54:17,232 INFO L226 Difference]: Without dead ends: 264 [2018-11-06 22:54:17,233 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6364 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=6973, Invalid=23827, Unknown=0, NotChecked=0, Total=30800 [2018-11-06 22:54:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. Received shutdown request... [2018-11-06 22:54:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2018-11-06 22:54:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2018-11-06 22:54:17,309 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 22:54:17,315 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 22:54:17,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:54:17 BoogieIcfgContainer [2018-11-06 22:54:17,315 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 22:54:17,316 INFO L168 Benchmark]: Toolchain (without parser) took 232860.39 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 899.7 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -565.7 MB). Peak memory consumption was 334.0 MB. Max. memory is 7.1 GB. [2018-11-06 22:54:17,317 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:54:17,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 22:54:17,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:54:17,319 INFO L168 Benchmark]: Boogie Preprocessor took 27.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 22:54:17,319 INFO L168 Benchmark]: RCFGBuilder took 375.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -787.2 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2018-11-06 22:54:17,320 INFO L168 Benchmark]: TraceAbstraction took 232105.10 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 163.6 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 210.9 MB). Peak memory consumption was 374.5 MB. Max. memory is 7.1 GB. [2018-11-06 22:54:17,325 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 38.41 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.73 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 375.31 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -787.2 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232105.10 ms. Allocated memory was 2.3 GB in the beginning and 2.4 GB in the end (delta: 163.6 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 210.9 MB). Peak memory consumption was 374.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 231.9s OverallTime, 86 OverallIterations, 43 TraceHistogramMax, 89.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3406 SDtfs, 7406 SDslu, 54293 SDs, 0 SdLazy, 55031 SolverSat, 4367 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17342 GetRequests, 11418 SyntacticMatches, 0 SemanticMatches, 5924 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123872 ImplicationChecksByTransitivity, 162.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=85, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 86 MinimizatonAttempts, 294 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.5s SatisfiabilityAnalysisTime, 127.9s InterpolantComputationTime, 22854 NumberOfCodeBlocks, 22854 NumberOfCodeBlocksAsserted, 1099 NumberOfCheckSat, 22685 ConstructedInterpolants, 0 QuantifiedInterpolants, 15693101 SizeOfPredicates, 249 NumberOfNonLiveVariables, 32060 ConjunctsInSsa, 4024 ConjunctsInUnsatCore, 169 InterpolantComputations, 3 PerfectInterpolantSequences, 157120/307102 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown