java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-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-new/count_by_nondet_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 09:40:21,901 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 09:40:21,903 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 09:40:21,915 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 09:40:21,916 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 09:40:21,917 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 09:40:21,918 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 09:40:21,920 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 09:40:21,922 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 09:40:21,923 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 09:40:21,924 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 09:40:21,924 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 09:40:21,925 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 09:40:21,926 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 09:40:21,928 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 09:40:21,929 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 09:40:21,930 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 09:40:21,932 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 09:40:21,934 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 09:40:21,936 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 09:40:21,937 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 09:40:21,939 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 09:40:21,941 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 09:40:21,942 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 09:40:21,942 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 09:40:21,943 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 09:40:21,944 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 09:40:21,945 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 09:40:21,946 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 09:40:21,951 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 09:40:21,951 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 09:40:21,952 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 09:40:21,952 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 09:40:21,952 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 09:40:21,956 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 09:40:21,957 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 09:40:21,957 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 09:40:21,993 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 09:40:21,994 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 09:40:21,994 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 09:40:21,995 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 09:40:21,995 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 09:40:21,996 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 09:40:21,996 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 09:40:21,996 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 09:40:21,996 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 09:40:21,996 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 09:40:21,997 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 09:40:21,997 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 09:40:21,997 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 09:40:21,997 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 09:40:21,997 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 09:40:21,998 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 09:40:21,999 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 09:40:21,999 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 09:40:21,999 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 09:40:22,000 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 09:40:22,000 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 09:40:22,000 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 09:40:22,000 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 09:40:22,000 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 09:40:22,001 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 09:40:22,001 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 09:40:22,001 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 09:40:22,002 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 09:40:22,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 09:40:22,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 09:40:22,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 09:40:22,088 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 09:40:22,088 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 09:40:22,089 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-10-23 09:40:22,152 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ce2e9d366/8b010eb33f9245a999b1ea7a270e1435/FLAGbaadd6b68 [2018-10-23 09:40:22,647 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 09:40:22,648 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_nondet_true-unreach-call_true-termination.i [2018-10-23 09:40:22,655 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ce2e9d366/8b010eb33f9245a999b1ea7a270e1435/FLAGbaadd6b68 [2018-10-23 09:40:22,670 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ce2e9d366/8b010eb33f9245a999b1ea7a270e1435 [2018-10-23 09:40:22,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 09:40:22,681 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 09:40:22,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 09:40:22,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 09:40:22,687 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 09:40:22,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e90e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22, skipping insertion in model container [2018-10-23 09:40:22,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 09:40:22,725 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 09:40:22,896 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:40:22,901 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 09:40:22,921 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 09:40:22,939 INFO L193 MainTranslator]: Completed translation [2018-10-23 09:40:22,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22 WrapperNode [2018-10-23 09:40:22,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 09:40:22,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 09:40:22,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 09:40:22,942 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 09:40:22,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,985 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 09:40:22,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 09:40:22,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 09:40:22,986 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 09:40:22,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:22,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:23,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:23,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:23,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... [2018-10-23 09:40:23,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 09:40:23,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 09:40:23,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 09:40:23,010 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 09:40:23,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:23,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 09:40:23,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 09:40:23,513 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 09:40:23,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:40:23 BoogieIcfgContainer [2018-10-23 09:40:23,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 09:40:23,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 09:40:23,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 09:40:23,518 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 09:40:23,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:40:22" (1/3) ... [2018-10-23 09:40:23,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d88d940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:40:23, skipping insertion in model container [2018-10-23 09:40:23,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:40:22" (2/3) ... [2018-10-23 09:40:23,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d88d940 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:40:23, skipping insertion in model container [2018-10-23 09:40:23,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:40:23" (3/3) ... [2018-10-23 09:40:23,522 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_nondet_true-unreach-call_true-termination.i [2018-10-23 09:40:23,532 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 09:40:23,541 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 09:40:23,558 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 09:40:23,587 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 09:40:23,588 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 09:40:23,588 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 09:40:23,588 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 09:40:23,588 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 09:40:23,589 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 09:40:23,589 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 09:40:23,589 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 09:40:23,589 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 09:40:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-23 09:40:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-23 09:40:23,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:23,611 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-23 09:40:23,613 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:23,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:23,619 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2018-10-23 09:40:23,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:23,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:23,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:23,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:23,740 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:23,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 09:40:23,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 09:40:23,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 09:40:23,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 09:40:23,760 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-23 09:40:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:23,777 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-23 09:40:23,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 09:40:23,779 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-23 09:40:23,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:23,788 INFO L225 Difference]: With dead ends: 21 [2018-10-23 09:40:23,788 INFO L226 Difference]: Without dead ends: 9 [2018-10-23 09:40:23,792 INFO L605 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 [2018-10-23 09:40:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-23 09:40:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-23 09:40:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-23 09:40:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-23 09:40:23,829 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-23 09:40:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:23,830 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-23 09:40:23,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 09:40:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-23 09:40:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 09:40:23,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:23,831 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:23,831 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:23,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1805928624, now seen corresponding path program 1 times [2018-10-23 09:40:23,832 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:23,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:23,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:23,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:23,901 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 09:40:23,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 09:40:23,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 09:40:23,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 09:40:23,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:23,906 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-23 09:40:24,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:24,001 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-23 09:40:24,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 09:40:24,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-23 09:40:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:24,003 INFO L225 Difference]: With dead ends: 16 [2018-10-23 09:40:24,003 INFO L226 Difference]: Without dead ends: 12 [2018-10-23 09:40:24,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 09:40:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-23 09:40:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-23 09:40:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 09:40:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-23 09:40:24,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-23 09:40:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:24,008 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-23 09:40:24,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 09:40:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-23 09:40:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-23 09:40:24,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:24,009 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:24,010 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:24,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:24,010 INFO L82 PathProgramCache]: Analyzing trace with hash -992267733, now seen corresponding path program 1 times [2018-10-23 09:40:24,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:24,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:24,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:24,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:24,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:24,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:24,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:24,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-23 09:40:24,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 09:40:24,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 09:40:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:40:24,186 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 4 states. [2018-10-23 09:40:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:24,243 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-23 09:40:24,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 09:40:24,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-23 09:40:24,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:24,244 INFO L225 Difference]: With dead ends: 18 [2018-10-23 09:40:24,244 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 09:40:24,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 09:40:24,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 09:40:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 09:40:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 09:40:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-23 09:40:24,249 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-23 09:40:24,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:24,249 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-23 09:40:24,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 09:40:24,249 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-23 09:40:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 09:40:24,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:24,250 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:24,251 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:24,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:24,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1039691056, now seen corresponding path program 2 times [2018-10-23 09:40:24,251 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:24,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:24,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:24,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:24,430 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:24,430 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:24,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:24,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:24,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:24,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:24,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:24,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-23 09:40:24,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 09:40:24,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 09:40:24,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 09:40:24,524 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-23 09:40:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:24,700 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-23 09:40:24,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 09:40:24,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-23 09:40:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:24,702 INFO L225 Difference]: With dead ends: 22 [2018-10-23 09:40:24,702 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 09:40:24,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:40:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 09:40:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-23 09:40:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-23 09:40:24,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-23 09:40:24,707 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-23 09:40:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:24,707 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-23 09:40:24,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 09:40:24,707 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-23 09:40:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 09:40:24,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:24,708 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:24,708 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:24,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:24,708 INFO L82 PathProgramCache]: Analyzing trace with hash -783666165, now seen corresponding path program 3 times [2018-10-23 09:40:24,709 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:24,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:24,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:24,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:25,008 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:25,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:25,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-23 09:40:25,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:25,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:25,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-23 09:40:25,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 09:40:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 09:40:25,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-23 09:40:25,141 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-10-23 09:40:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:25,199 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-23 09:40:25,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 09:40:25,200 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-23 09:40:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:25,201 INFO L225 Difference]: With dead ends: 25 [2018-10-23 09:40:25,201 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 09:40:25,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:40:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 09:40:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-23 09:40:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-23 09:40:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-23 09:40:25,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-23 09:40:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:25,206 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-23 09:40:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 09:40:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-23 09:40:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 09:40:25,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:25,207 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:25,207 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:25,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1408056080, now seen corresponding path program 4 times [2018-10-23 09:40:25,208 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:25,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:25,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:25,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:25,321 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:25,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:25,346 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:25,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:25,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:25,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-23 09:40:25,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 09:40:25,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 09:40:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-23 09:40:25,494 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-23 09:40:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:25,561 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-23 09:40:25,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 09:40:25,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-23 09:40:25,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:25,563 INFO L225 Difference]: With dead ends: 28 [2018-10-23 09:40:25,563 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 09:40:25,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:40:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 09:40:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-23 09:40:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-23 09:40:25,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-23 09:40:25,569 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-23 09:40:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:25,569 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-23 09:40:25,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 09:40:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-23 09:40:25,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-23 09:40:25,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:25,570 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:25,571 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:25,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1104654869, now seen corresponding path program 5 times [2018-10-23 09:40:25,571 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:25,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:25,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:25,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:25,714 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:25,722 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:25,752 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-23 09:40:25,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:25,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:25,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:25,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-23 09:40:25,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 09:40:25,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 09:40:25,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-23 09:40:25,816 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-10-23 09:40:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:26,021 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-23 09:40:26,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 09:40:26,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-23 09:40:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:26,023 INFO L225 Difference]: With dead ends: 31 [2018-10-23 09:40:26,023 INFO L226 Difference]: Without dead ends: 27 [2018-10-23 09:40:26,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:40:26,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-23 09:40:26,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-23 09:40:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 09:40:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-23 09:40:26,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-23 09:40:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:26,029 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-23 09:40:26,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 09:40:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-23 09:40:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 09:40:26,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:26,030 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:26,031 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:26,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:26,031 INFO L82 PathProgramCache]: Analyzing trace with hash 909631248, now seen corresponding path program 6 times [2018-10-23 09:40:26,031 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:26,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:26,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:26,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:26,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:26,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:26,334 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:26,348 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:26,372 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-23 09:40:26,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:26,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:26,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:26,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-23 09:40:26,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 09:40:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 09:40:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-23 09:40:26,414 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-23 09:40:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:26,527 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-23 09:40:26,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 09:40:26,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-23 09:40:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:26,528 INFO L225 Difference]: With dead ends: 34 [2018-10-23 09:40:26,528 INFO L226 Difference]: Without dead ends: 30 [2018-10-23 09:40:26,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:40:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-23 09:40:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-23 09:40:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 09:40:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-23 09:40:26,534 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-23 09:40:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:26,534 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-23 09:40:26,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 09:40:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-23 09:40:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 09:40:26,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:26,535 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:26,535 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:26,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash -775716917, now seen corresponding path program 7 times [2018-10-23 09:40:26,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:26,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:26,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:26,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:26,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:26,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:26,849 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:26,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:26,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:26,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:26,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-23 09:40:26,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 09:40:26,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 09:40:26,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2018-10-23 09:40:26,942 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-10-23 09:40:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:27,004 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-23 09:40:27,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 09:40:27,005 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-10-23 09:40:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:27,006 INFO L225 Difference]: With dead ends: 37 [2018-10-23 09:40:27,006 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 09:40:27,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:40:27,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 09:40:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-23 09:40:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-23 09:40:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-23 09:40:27,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-23 09:40:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:27,012 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-23 09:40:27,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 09:40:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-23 09:40:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 09:40:27,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:27,013 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:27,014 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:27,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash -815210192, now seen corresponding path program 8 times [2018-10-23 09:40:27,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:27,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:27,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:27,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:27,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:27,241 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:27,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:27,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:27,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:27,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:27,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:27,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-23 09:40:27,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 09:40:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 09:40:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2018-10-23 09:40:27,353 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-10-23 09:40:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:27,715 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-23 09:40:27,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 09:40:27,716 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-10-23 09:40:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:27,717 INFO L225 Difference]: With dead ends: 40 [2018-10-23 09:40:27,717 INFO L226 Difference]: Without dead ends: 36 [2018-10-23 09:40:27,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:40:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-23 09:40:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-23 09:40:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-23 09:40:27,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-23 09:40:27,722 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-23 09:40:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:27,723 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-23 09:40:27,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 09:40:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-23 09:40:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 09:40:27,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:27,724 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:27,724 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:27,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -538326613, now seen corresponding path program 9 times [2018-10-23 09:40:27,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:27,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:27,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:27,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:27,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:27,949 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:27,959 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:28,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-23 09:40:28,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:28,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:28,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:28,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-23 09:40:28,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 09:40:28,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 09:40:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2018-10-23 09:40:28,163 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-10-23 09:40:28,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:28,248 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-23 09:40:28,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 09:40:28,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-23 09:40:28,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:28,250 INFO L225 Difference]: With dead ends: 43 [2018-10-23 09:40:28,251 INFO L226 Difference]: Without dead ends: 39 [2018-10-23 09:40:28,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:40:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-23 09:40:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-23 09:40:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 09:40:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-23 09:40:28,257 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-23 09:40:28,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:28,258 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-23 09:40:28,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 09:40:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-23 09:40:28,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 09:40:28,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:28,259 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:28,259 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:28,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:28,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1763167056, now seen corresponding path program 10 times [2018-10-23 09:40:28,260 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:28,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:28,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:28,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:28,474 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:28,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:28,475 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:28,483 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:28,531 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:28,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:28,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:28,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:28,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-23 09:40:28,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 09:40:28,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 09:40:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2018-10-23 09:40:28,764 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-10-23 09:40:28,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:28,821 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-23 09:40:28,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 09:40:28,823 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-10-23 09:40:28,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:28,824 INFO L225 Difference]: With dead ends: 46 [2018-10-23 09:40:28,824 INFO L226 Difference]: Without dead ends: 42 [2018-10-23 09:40:28,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:40:28,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-23 09:40:28,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-23 09:40:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-23 09:40:28,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-23 09:40:28,837 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-23 09:40:28,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:28,837 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-23 09:40:28,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 09:40:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-23 09:40:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 09:40:28,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:28,839 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:28,840 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:28,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash 703146891, now seen corresponding path program 11 times [2018-10-23 09:40:28,841 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:28,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:28,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:28,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:29,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:29,225 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:29,233 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:29,265 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-23 09:40:29,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:29,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:29,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:29,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-23 09:40:29,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 09:40:29,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 09:40:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2018-10-23 09:40:29,333 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-10-23 09:40:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:29,405 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-23 09:40:29,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 09:40:29,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-23 09:40:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:29,408 INFO L225 Difference]: With dead ends: 49 [2018-10-23 09:40:29,408 INFO L226 Difference]: Without dead ends: 45 [2018-10-23 09:40:29,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:40:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-23 09:40:29,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-23 09:40:29,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-23 09:40:29,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-23 09:40:29,414 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-23 09:40:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:29,415 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-23 09:40:29,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 09:40:29,415 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-23 09:40:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 09:40:29,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:29,416 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:29,416 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:29,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1758028432, now seen corresponding path program 12 times [2018-10-23 09:40:29,417 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:29,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:29,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:29,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:29,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:29,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:29,648 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:29,659 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:29,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-23 09:40:29,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:29,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:29,774 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:29,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:29,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-23 09:40:29,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 09:40:29,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 09:40:29,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-23 09:40:29,796 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-10-23 09:40:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:29,866 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-23 09:40:29,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 09:40:29,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-10-23 09:40:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:29,868 INFO L225 Difference]: With dead ends: 52 [2018-10-23 09:40:29,868 INFO L226 Difference]: Without dead ends: 48 [2018-10-23 09:40:29,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:40:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-23 09:40:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-23 09:40:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 09:40:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-23 09:40:29,875 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-23 09:40:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:29,876 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-23 09:40:29,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 09:40:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-23 09:40:29,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 09:40:29,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:29,877 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:29,877 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:29,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:29,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1049601387, now seen corresponding path program 13 times [2018-10-23 09:40:29,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:29,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:29,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:29,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:29,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:30,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:30,185 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:30,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:30,225 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:30,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:30,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-23 09:40:30,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 09:40:30,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 09:40:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2018-10-23 09:40:30,287 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-10-23 09:40:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:30,366 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-23 09:40:30,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 09:40:30,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-23 09:40:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:30,368 INFO L225 Difference]: With dead ends: 55 [2018-10-23 09:40:30,368 INFO L226 Difference]: Without dead ends: 51 [2018-10-23 09:40:30,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=180, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:40:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-23 09:40:30,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-23 09:40:30,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 09:40:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-23 09:40:30,374 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-23 09:40:30,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:30,374 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-23 09:40:30,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 09:40:30,375 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-23 09:40:30,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 09:40:30,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:30,375 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:30,376 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:30,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:30,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1338550384, now seen corresponding path program 14 times [2018-10-23 09:40:30,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:30,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:30,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:30,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:30,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:30,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:30,742 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:30,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:30,794 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:30,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:30,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:30,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:30,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-23 09:40:30,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 09:40:30,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 09:40:30,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2018-10-23 09:40:30,935 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-10-23 09:40:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:31,043 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-23 09:40:31,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 09:40:31,044 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-10-23 09:40:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:31,045 INFO L225 Difference]: With dead ends: 58 [2018-10-23 09:40:31,045 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 09:40:31,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=200, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:40:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 09:40:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-23 09:40:31,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 09:40:31,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-23 09:40:31,051 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-23 09:40:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:31,052 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-23 09:40:31,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 09:40:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-23 09:40:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 09:40:31,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:31,053 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:31,053 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:31,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash -634702005, now seen corresponding path program 15 times [2018-10-23 09:40:31,054 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:31,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:31,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:31,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:31,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:31,353 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:31,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:31,408 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-23 09:40:31,408 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:31,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:31,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:31,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-23 09:40:31,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 09:40:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 09:40:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2018-10-23 09:40:31,470 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-10-23 09:40:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:31,585 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-23 09:40:31,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 09:40:31,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-23 09:40:31,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:31,586 INFO L225 Difference]: With dead ends: 61 [2018-10-23 09:40:31,586 INFO L226 Difference]: Without dead ends: 57 [2018-10-23 09:40:31,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=221, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:40:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-23 09:40:31,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-23 09:40:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 09:40:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-23 09:40:31,597 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-23 09:40:31,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:31,598 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-23 09:40:31,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 09:40:31,598 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-23 09:40:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 09:40:31,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:31,602 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:31,603 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:31,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash -317982288, now seen corresponding path program 16 times [2018-10-23 09:40:31,603 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:31,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:31,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:31,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:32,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:32,499 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:32,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:32,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:32,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:32,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:32,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:32,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-23 09:40:32,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 09:40:32,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 09:40:32,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2018-10-23 09:40:32,657 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-10-23 09:40:32,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:32,929 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-23 09:40:32,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 09:40:32,929 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-23 09:40:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:32,930 INFO L225 Difference]: With dead ends: 64 [2018-10-23 09:40:32,930 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 09:40:32,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=243, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:40:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 09:40:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-23 09:40:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-23 09:40:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-23 09:40:32,936 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-23 09:40:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:32,936 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-23 09:40:32,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 09:40:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-23 09:40:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 09:40:32,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:32,938 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:32,938 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:32,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:32,938 INFO L82 PathProgramCache]: Analyzing trace with hash -964042453, now seen corresponding path program 17 times [2018-10-23 09:40:32,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:32,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:32,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:32,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:32,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:33,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:33,450 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:33,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:33,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-23 09:40:33,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:33,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:33,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:33,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-23 09:40:33,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 09:40:33,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 09:40:33,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2018-10-23 09:40:33,567 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-10-23 09:40:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:33,633 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-23 09:40:33,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 09:40:33,634 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-23 09:40:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:33,635 INFO L225 Difference]: With dead ends: 67 [2018-10-23 09:40:33,635 INFO L226 Difference]: Without dead ends: 63 [2018-10-23 09:40:33,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=266, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:40:33,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-23 09:40:33,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-23 09:40:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-23 09:40:33,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-23 09:40:33,641 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-23 09:40:33,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:33,641 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-23 09:40:33,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 09:40:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-23 09:40:33,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-23 09:40:33,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:33,643 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:33,643 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:33,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:33,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1993964592, now seen corresponding path program 18 times [2018-10-23 09:40:33,643 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:33,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:33,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:33,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:33,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:34,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:34,193 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:34,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:34,252 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-23 09:40:34,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:34,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:34,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:34,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-23 09:40:34,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 09:40:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 09:40:34,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-23 09:40:34,367 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-10-23 09:40:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:34,485 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-23 09:40:34,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 09:40:34,486 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-10-23 09:40:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:34,486 INFO L225 Difference]: With dead ends: 70 [2018-10-23 09:40:34,486 INFO L226 Difference]: Without dead ends: 66 [2018-10-23 09:40:34,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=290, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:40:34,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-23 09:40:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-23 09:40:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-23 09:40:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-23 09:40:34,491 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-23 09:40:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:34,491 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-23 09:40:34,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 09:40:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-23 09:40:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 09:40:34,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:34,492 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:34,493 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:34,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1158044917, now seen corresponding path program 19 times [2018-10-23 09:40:34,493 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:34,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:34,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:34,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:34,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:35,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:35,027 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:35,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:35,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:35,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:35,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-23 09:40:35,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 09:40:35,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 09:40:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2018-10-23 09:40:35,177 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-10-23 09:40:35,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:35,303 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-23 09:40:35,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 09:40:35,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-10-23 09:40:35,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:35,304 INFO L225 Difference]: With dead ends: 73 [2018-10-23 09:40:35,304 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 09:40:35,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=315, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:40:35,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 09:40:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-23 09:40:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-23 09:40:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-23 09:40:35,308 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-23 09:40:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:35,308 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-23 09:40:35,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 09:40:35,309 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-23 09:40:35,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 09:40:35,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:35,310 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:35,310 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:35,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash -495389200, now seen corresponding path program 20 times [2018-10-23 09:40:35,310 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:35,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:35,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:35,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:35,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:36,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:36,645 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:36,654 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:36,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:36,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:36,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:36,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:36,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-23 09:40:36,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-23 09:40:36,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-23 09:40:36,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2018-10-23 09:40:36,773 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-10-23 09:40:36,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:36,864 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-23 09:40:36,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-23 09:40:36,866 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-10-23 09:40:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:36,867 INFO L225 Difference]: With dead ends: 76 [2018-10-23 09:40:36,867 INFO L226 Difference]: Without dead ends: 72 [2018-10-23 09:40:36,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:40:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-23 09:40:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-23 09:40:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-23 09:40:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-23 09:40:36,870 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-23 09:40:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:36,871 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-23 09:40:36,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-23 09:40:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-23 09:40:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-23 09:40:36,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:36,872 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:36,872 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:36,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1011383531, now seen corresponding path program 21 times [2018-10-23 09:40:36,873 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:36,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:36,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:36,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:36,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:37,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:37,269 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:37,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:37,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-23 09:40:37,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:37,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:37,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:37,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-23 09:40:37,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-23 09:40:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-23 09:40:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2018-10-23 09:40:37,373 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-10-23 09:40:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:37,529 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-23 09:40:37,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-23 09:40:37,530 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-23 09:40:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:37,531 INFO L225 Difference]: With dead ends: 79 [2018-10-23 09:40:37,531 INFO L226 Difference]: Without dead ends: 75 [2018-10-23 09:40:37,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=368, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:40:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-23 09:40:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-23 09:40:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-23 09:40:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-23 09:40:37,535 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-23 09:40:37,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:37,535 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-23 09:40:37,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-23 09:40:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-23 09:40:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-23 09:40:37,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:37,536 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:37,537 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:37,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:37,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1720365040, now seen corresponding path program 22 times [2018-10-23 09:40:37,537 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:37,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:37,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:37,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:37,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:38,032 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:38,032 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:38,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:38,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:38,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:38,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:38,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:38,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-23 09:40:38,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-23 09:40:38,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-23 09:40:38,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2018-10-23 09:40:38,220 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-10-23 09:40:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:38,626 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-23 09:40:38,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 09:40:38,627 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-10-23 09:40:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:38,628 INFO L225 Difference]: With dead ends: 82 [2018-10-23 09:40:38,628 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 09:40:38,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:40:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 09:40:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-23 09:40:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-23 09:40:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-23 09:40:38,632 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-23 09:40:38,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:38,633 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-23 09:40:38,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-23 09:40:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-23 09:40:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 09:40:38,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:38,633 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:38,634 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:38,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:38,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2093248203, now seen corresponding path program 23 times [2018-10-23 09:40:38,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:38,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:38,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:38,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:38,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:39,593 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:39,593 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:39,601 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:39,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-23 09:40:39,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:39,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:39,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:39,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-23 09:40:39,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-23 09:40:39,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-23 09:40:39,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2018-10-23 09:40:39,728 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-10-23 09:40:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:39,822 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-23 09:40:39,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-23 09:40:39,823 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-10-23 09:40:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:39,824 INFO L225 Difference]: With dead ends: 85 [2018-10-23 09:40:39,824 INFO L226 Difference]: Without dead ends: 81 [2018-10-23 09:40:39,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=425, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-23 09:40:39,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-23 09:40:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-23 09:40:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-23 09:40:39,829 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-23 09:40:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:39,830 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-23 09:40:39,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-23 09:40:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-23 09:40:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 09:40:39,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:39,831 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:39,831 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:39,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1324510672, now seen corresponding path program 24 times [2018-10-23 09:40:39,831 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:39,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:39,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:39,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:39,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:40,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:40,882 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:40,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:40,953 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-23 09:40:40,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:40,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:41,026 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:41,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:41,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-23 09:40:41,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-23 09:40:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-23 09:40:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-23 09:40:41,049 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-10-23 09:40:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:41,101 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-23 09:40:41,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-23 09:40:41,102 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-10-23 09:40:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:41,103 INFO L225 Difference]: With dead ends: 88 [2018-10-23 09:40:41,103 INFO L226 Difference]: Without dead ends: 84 [2018-10-23 09:40:41,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=357, Invalid=455, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:40:41,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-23 09:40:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-23 09:40:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-23 09:40:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-23 09:40:41,107 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-23 09:40:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:41,107 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-23 09:40:41,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-23 09:40:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-23 09:40:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-23 09:40:41,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:41,108 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:41,108 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:41,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:41,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1010530475, now seen corresponding path program 25 times [2018-10-23 09:40:41,108 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:41,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:41,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:41,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:42,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:42,340 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:42,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:42,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:42,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:42,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-23 09:40:42,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-23 09:40:42,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-23 09:40:42,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2018-10-23 09:40:42,462 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-10-23 09:40:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:42,528 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-23 09:40:42,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-23 09:40:42,528 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-23 09:40:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:42,530 INFO L225 Difference]: With dead ends: 91 [2018-10-23 09:40:42,530 INFO L226 Difference]: Without dead ends: 87 [2018-10-23 09:40:42,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=384, Invalid=486, Unknown=0, NotChecked=0, Total=870 [2018-10-23 09:40:42,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-23 09:40:42,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-23 09:40:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-23 09:40:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-23 09:40:42,534 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-23 09:40:42,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:42,534 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-23 09:40:42,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-23 09:40:42,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-23 09:40:42,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-23 09:40:42,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:42,535 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:42,535 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:42,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:42,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1363952560, now seen corresponding path program 26 times [2018-10-23 09:40:42,536 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:42,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:42,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:42,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:42,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:43,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:43,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:43,095 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:43,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:43,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:43,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:43,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:43,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-23 09:40:43,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-23 09:40:43,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-23 09:40:43,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2018-10-23 09:40:43,246 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-10-23 09:40:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:43,366 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-23 09:40:43,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-23 09:40:43,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-10-23 09:40:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:43,367 INFO L225 Difference]: With dead ends: 94 [2018-10-23 09:40:43,367 INFO L226 Difference]: Without dead ends: 90 [2018-10-23 09:40:43,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=412, Invalid=518, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:40:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-23 09:40:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-23 09:40:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-23 09:40:43,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-23 09:40:43,371 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-23 09:40:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:43,371 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-23 09:40:43,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-23 09:40:43,371 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-23 09:40:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-23 09:40:43,372 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:43,372 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:43,372 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:43,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:43,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1476683125, now seen corresponding path program 27 times [2018-10-23 09:40:43,372 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:43,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:43,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:43,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:43,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:44,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:44,727 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:44,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:44,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-23 09:40:44,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:44,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:44,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:44,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-23 09:40:44,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-23 09:40:44,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-23 09:40:44,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2018-10-23 09:40:44,856 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-10-23 09:40:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:44,922 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-23 09:40:44,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-23 09:40:44,923 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-10-23 09:40:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:44,924 INFO L225 Difference]: With dead ends: 97 [2018-10-23 09:40:44,924 INFO L226 Difference]: Without dead ends: 93 [2018-10-23 09:40:44,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=441, Invalid=551, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:40:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-23 09:40:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-23 09:40:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-23 09:40:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-23 09:40:44,929 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-23 09:40:44,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:44,930 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-23 09:40:44,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-23 09:40:44,930 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-23 09:40:44,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-23 09:40:44,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:44,931 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:44,931 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:44,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1168519568, now seen corresponding path program 28 times [2018-10-23 09:40:44,931 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:44,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:44,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:44,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:44,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:46,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:46,394 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:46,402 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:46,446 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:46,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:46,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:46,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:46,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-23 09:40:46,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-23 09:40:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-23 09:40:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2018-10-23 09:40:46,554 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-23 09:40:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:46,629 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-23 09:40:46,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-23 09:40:46,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-23 09:40:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:46,630 INFO L225 Difference]: With dead ends: 100 [2018-10-23 09:40:46,631 INFO L226 Difference]: Without dead ends: 96 [2018-10-23 09:40:46,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=471, Invalid=585, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:40:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-23 09:40:46,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-23 09:40:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-23 09:40:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-23 09:40:46,635 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-23 09:40:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:46,635 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-23 09:40:46,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-23 09:40:46,635 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-23 09:40:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-23 09:40:46,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:46,636 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:46,636 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:46,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:46,637 INFO L82 PathProgramCache]: Analyzing trace with hash 986895467, now seen corresponding path program 29 times [2018-10-23 09:40:46,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:46,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:46,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:46,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:46,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:47,239 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:47,239 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:47,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:47,324 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-23 09:40:47,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:47,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:47,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:47,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-23 09:40:47,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-23 09:40:47,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-23 09:40:47,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2018-10-23 09:40:47,418 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-10-23 09:40:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:47,642 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-23 09:40:47,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-23 09:40:47,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-23 09:40:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:47,644 INFO L225 Difference]: With dead ends: 103 [2018-10-23 09:40:47,644 INFO L226 Difference]: Without dead ends: 99 [2018-10-23 09:40:47,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=502, Invalid=620, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:40:47,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-23 09:40:47,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-23 09:40:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-23 09:40:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-23 09:40:47,649 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-23 09:40:47,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:47,649 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-23 09:40:47,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-23 09:40:47,650 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-23 09:40:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-23 09:40:47,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:47,650 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:47,651 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:47,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:47,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1099839344, now seen corresponding path program 30 times [2018-10-23 09:40:47,651 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:47,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:47,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:47,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:47,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:49,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:49,785 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:49,792 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:49,861 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-23 09:40:49,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:49,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:49,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:49,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-23 09:40:49,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-23 09:40:49,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-23 09:40:49,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-23 09:40:49,958 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-10-23 09:40:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:50,052 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-23 09:40:50,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-23 09:40:50,053 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-10-23 09:40:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:50,054 INFO L225 Difference]: With dead ends: 106 [2018-10-23 09:40:50,054 INFO L226 Difference]: Without dead ends: 102 [2018-10-23 09:40:50,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=534, Invalid=656, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:40:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-23 09:40:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-23 09:40:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-23 09:40:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-23 09:40:50,059 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-23 09:40:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:50,059 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-23 09:40:50,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-23 09:40:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-23 09:40:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-23 09:40:50,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:50,060 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:50,060 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:50,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:50,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1659951541, now seen corresponding path program 31 times [2018-10-23 09:40:50,060 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:50,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:50,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:50,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:50,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:50,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:50,650 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:50,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:50,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:50,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:50,929 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-23 09:40:50,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-23 09:40:50,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-23 09:40:50,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2018-10-23 09:40:50,931 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-10-23 09:40:51,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:51,027 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-23 09:40:51,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-23 09:40:51,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-10-23 09:40:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:51,028 INFO L225 Difference]: With dead ends: 109 [2018-10-23 09:40:51,029 INFO L226 Difference]: Without dead ends: 105 [2018-10-23 09:40:51,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=567, Invalid=693, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 09:40:51,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-23 09:40:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-23 09:40:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-23 09:40:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-23 09:40:51,033 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-23 09:40:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:51,034 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-23 09:40:51,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-23 09:40:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-23 09:40:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-23 09:40:51,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:51,035 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:51,035 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:51,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:51,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2014467408, now seen corresponding path program 32 times [2018-10-23 09:40:51,035 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:51,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:51,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:51,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:51,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:51,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:51,705 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:51,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:40:51,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:40:51,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:51,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:51,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:51,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-23 09:40:51,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-23 09:40:51,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-23 09:40:51,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2018-10-23 09:40:51,848 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-10-23 09:40:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:51,955 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-23 09:40:51,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-23 09:40:51,955 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-10-23 09:40:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:51,956 INFO L225 Difference]: With dead ends: 112 [2018-10-23 09:40:51,956 INFO L226 Difference]: Without dead ends: 108 [2018-10-23 09:40:51,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=601, Invalid=731, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-23 09:40:51,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-23 09:40:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-23 09:40:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-23 09:40:51,961 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-23 09:40:51,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:51,962 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-23 09:40:51,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-23 09:40:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-23 09:40:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-23 09:40:51,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:51,963 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:51,963 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:51,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2072080341, now seen corresponding path program 33 times [2018-10-23 09:40:51,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:51,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:51,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:51,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:51,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:52,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:52,593 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:52,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:40:52,669 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-23 09:40:52,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:52,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:53,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:53,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-23 09:40:53,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-23 09:40:53,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-23 09:40:53,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-10-23 09:40:53,142 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-10-23 09:40:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:53,245 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-23 09:40:53,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-23 09:40:53,246 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-23 09:40:53,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:53,247 INFO L225 Difference]: With dead ends: 115 [2018-10-23 09:40:53,247 INFO L226 Difference]: Without dead ends: 111 [2018-10-23 09:40:53,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=770, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:40:53,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-23 09:40:53,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-23 09:40:53,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-23 09:40:53,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-23 09:40:53,251 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-23 09:40:53,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:53,251 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-23 09:40:53,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-23 09:40:53,251 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-23 09:40:53,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-23 09:40:53,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:53,252 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:53,252 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:53,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:53,252 INFO L82 PathProgramCache]: Analyzing trace with hash -432048944, now seen corresponding path program 34 times [2018-10-23 09:40:53,252 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:53,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:53,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:53,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:53,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:53,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:53,877 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:53,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:40:53,940 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:40:53,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:53,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:54,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:54,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-23 09:40:54,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-23 09:40:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-23 09:40:54,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2018-10-23 09:40:54,029 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-10-23 09:40:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:54,126 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-23 09:40:54,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-23 09:40:54,126 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-10-23 09:40:54,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:54,127 INFO L225 Difference]: With dead ends: 118 [2018-10-23 09:40:54,128 INFO L226 Difference]: Without dead ends: 114 [2018-10-23 09:40:54,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=810, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:40:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-23 09:40:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-23 09:40:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-23 09:40:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-23 09:40:54,134 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-23 09:40:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:54,134 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-23 09:40:54,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-23 09:40:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-23 09:40:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-23 09:40:54,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:54,135 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:54,135 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:54,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:54,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1804660213, now seen corresponding path program 35 times [2018-10-23 09:40:54,136 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:54,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:54,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:54,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:54,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:55,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:55,261 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:55,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:40:55,340 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-23 09:40:55,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:55,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:55,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:55,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-23 09:40:55,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-23 09:40:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-23 09:40:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2018-10-23 09:40:55,422 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-10-23 09:40:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:55,521 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-23 09:40:55,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-23 09:40:55,522 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-10-23 09:40:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:55,523 INFO L225 Difference]: With dead ends: 121 [2018-10-23 09:40:55,523 INFO L226 Difference]: Without dead ends: 117 [2018-10-23 09:40:55,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=709, Invalid=851, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:40:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-23 09:40:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-23 09:40:55,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-23 09:40:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-23 09:40:55,527 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-23 09:40:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:55,527 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-23 09:40:55,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-23 09:40:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-23 09:40:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-23 09:40:55,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:55,530 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:55,530 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:55,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:55,530 INFO L82 PathProgramCache]: Analyzing trace with hash -883349776, now seen corresponding path program 36 times [2018-10-23 09:40:55,531 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:55,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:55,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:55,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:55,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:56,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:56,246 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:56,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:40:56,332 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-23 09:40:56,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:40:56,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:56,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:56,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-23 09:40:56,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-23 09:40:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-23 09:40:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-23 09:40:56,412 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-10-23 09:40:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:56,498 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-23 09:40:56,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-23 09:40:56,498 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-10-23 09:40:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:56,499 INFO L225 Difference]: With dead ends: 124 [2018-10-23 09:40:56,500 INFO L226 Difference]: Without dead ends: 120 [2018-10-23 09:40:56,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=747, Invalid=893, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 09:40:56,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-23 09:40:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-23 09:40:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-23 09:40:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-23 09:40:56,504 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-23 09:40:56,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:56,504 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-23 09:40:56,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-23 09:40:56,504 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-23 09:40:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-23 09:40:56,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:56,505 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:56,505 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:56,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:56,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1034857451, now seen corresponding path program 37 times [2018-10-23 09:40:56,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:56,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:56,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:56,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:40:56,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:57,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:57,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:40:57,739 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:40:57,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:40:57,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:40:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:40:58,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:40:58,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-23 09:40:58,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-23 09:40:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-23 09:40:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2018-10-23 09:40:58,327 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-10-23 09:40:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:40:58,996 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-23 09:40:58,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-23 09:40:58,997 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-23 09:40:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:40:58,998 INFO L225 Difference]: With dead ends: 127 [2018-10-23 09:40:58,998 INFO L226 Difference]: Without dead ends: 123 [2018-10-23 09:40:58,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=786, Invalid=936, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:40:58,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-23 09:40:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-23 09:40:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-23 09:40:59,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-23 09:40:59,002 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-23 09:40:59,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:40:59,003 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-23 09:40:59,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-23 09:40:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-23 09:40:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-23 09:40:59,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:40:59,003 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-23 09:40:59,004 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:40:59,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:40:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1806483728, now seen corresponding path program 38 times [2018-10-23 09:40:59,004 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:40:59,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:40:59,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:59,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:40:59,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:40:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:01,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:01,620 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:01,641 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:01,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:01,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:01,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:01,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:01,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-23 09:41:01,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-23 09:41:01,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-23 09:41:01,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2018-10-23 09:41:01,829 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-10-23 09:41:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:01,947 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-23 09:41:01,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-23 09:41:01,948 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-10-23 09:41:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:01,949 INFO L225 Difference]: With dead ends: 130 [2018-10-23 09:41:01,949 INFO L226 Difference]: Without dead ends: 126 [2018-10-23 09:41:01,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=826, Invalid=980, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:41:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-23 09:41:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-23 09:41:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-23 09:41:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-23 09:41:01,953 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-23 09:41:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:01,953 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-23 09:41:01,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-23 09:41:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-23 09:41:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-23 09:41:01,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:01,954 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:01,954 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:01,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1635033653, now seen corresponding path program 39 times [2018-10-23 09:41:01,955 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:01,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:01,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:01,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:01,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:01,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:02,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:02,708 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:02,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:02,812 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-23 09:41:02,812 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:02,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:02,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:02,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-23 09:41:02,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-23 09:41:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-23 09:41:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2018-10-23 09:41:02,896 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-10-23 09:41:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:02,968 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-23 09:41:02,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-23 09:41:02,969 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-10-23 09:41:02,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:02,971 INFO L225 Difference]: With dead ends: 133 [2018-10-23 09:41:02,971 INFO L226 Difference]: Without dead ends: 129 [2018-10-23 09:41:02,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=867, Invalid=1025, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:41:02,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-23 09:41:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-23 09:41:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-23 09:41:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-23 09:41:02,975 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-23 09:41:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:02,976 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-23 09:41:02,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-23 09:41:02,976 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-23 09:41:02,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-23 09:41:02,977 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:02,977 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:02,977 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:02,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:02,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1579959088, now seen corresponding path program 40 times [2018-10-23 09:41:02,978 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:02,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:02,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:02,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:02,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:04,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:04,043 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:04,052 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:04,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:04,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:04,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:04,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:04,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-23 09:41:04,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-23 09:41:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-23 09:41:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2018-10-23 09:41:04,320 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-10-23 09:41:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:04,532 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-23 09:41:04,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-23 09:41:04,532 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-10-23 09:41:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:04,533 INFO L225 Difference]: With dead ends: 136 [2018-10-23 09:41:04,533 INFO L226 Difference]: Without dead ends: 132 [2018-10-23 09:41:04,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=909, Invalid=1071, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 09:41:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-23 09:41:04,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-23 09:41:04,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-23 09:41:04,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-23 09:41:04,538 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-23 09:41:04,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:04,538 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-23 09:41:04,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-23 09:41:04,538 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-23 09:41:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-23 09:41:04,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:04,539 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:04,540 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:04,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:04,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1658005419, now seen corresponding path program 41 times [2018-10-23 09:41:04,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:04,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:04,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:04,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:04,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:06,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:06,013 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:06,020 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:06,292 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-23 09:41:06,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:06,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:06,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:06,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-23 09:41:06,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-23 09:41:06,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-23 09:41:06,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2018-10-23 09:41:06,353 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-10-23 09:41:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:06,471 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-23 09:41:06,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-23 09:41:06,471 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-23 09:41:06,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:06,472 INFO L225 Difference]: With dead ends: 139 [2018-10-23 09:41:06,472 INFO L226 Difference]: Without dead ends: 135 [2018-10-23 09:41:06,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=952, Invalid=1118, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:41:06,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-23 09:41:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-23 09:41:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-23 09:41:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-23 09:41:06,476 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-23 09:41:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:06,477 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-23 09:41:06,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-23 09:41:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-23 09:41:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-23 09:41:06,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:06,478 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:06,478 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:06,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1136022192, now seen corresponding path program 42 times [2018-10-23 09:41:06,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:06,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:06,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:06,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:06,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:07,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:07,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:07,490 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:07,583 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-23 09:41:07,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:07,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:07,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:07,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-23 09:41:07,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-23 09:41:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-23 09:41:07,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-23 09:41:07,682 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-10-23 09:41:07,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:07,770 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-23 09:41:07,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-23 09:41:07,771 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-10-23 09:41:07,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:07,771 INFO L225 Difference]: With dead ends: 142 [2018-10-23 09:41:07,772 INFO L226 Difference]: Without dead ends: 138 [2018-10-23 09:41:07,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=996, Invalid=1166, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:41:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-23 09:41:07,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-23 09:41:07,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-23 09:41:07,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-23 09:41:07,776 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-23 09:41:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:07,776 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-23 09:41:07,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-23 09:41:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-23 09:41:07,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-23 09:41:07,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:07,777 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:07,777 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:07,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:07,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1546385013, now seen corresponding path program 43 times [2018-10-23 09:41:07,778 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:07,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:07,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:07,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:07,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:09,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:09,349 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:09,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:09,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:09,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:09,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-23 09:41:09,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-23 09:41:09,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-23 09:41:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2018-10-23 09:41:09,532 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-10-23 09:41:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:09,920 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-23 09:41:09,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-23 09:41:09,920 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-10-23 09:41:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:09,921 INFO L225 Difference]: With dead ends: 145 [2018-10-23 09:41:09,921 INFO L226 Difference]: Without dead ends: 141 [2018-10-23 09:41:09,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1041, Invalid=1215, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 09:41:09,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-23 09:41:09,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-23 09:41:09,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-23 09:41:09,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-23 09:41:09,924 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-23 09:41:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:09,925 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-23 09:41:09,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-23 09:41:09,925 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-23 09:41:09,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-23 09:41:09,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:09,926 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:09,926 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:09,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:09,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1106706288, now seen corresponding path program 44 times [2018-10-23 09:41:09,926 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:09,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:09,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:09,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:09,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:10,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:10,906 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:10,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:10,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:10,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:10,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:11,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:11,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-23 09:41:11,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-23 09:41:11,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-23 09:41:11,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2018-10-23 09:41:11,080 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-10-23 09:41:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:11,174 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-23 09:41:11,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-23 09:41:11,175 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-10-23 09:41:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:11,176 INFO L225 Difference]: With dead ends: 148 [2018-10-23 09:41:11,176 INFO L226 Difference]: Without dead ends: 144 [2018-10-23 09:41:11,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1087, Invalid=1265, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:41:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-23 09:41:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-23 09:41:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-23 09:41:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-23 09:41:11,181 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-23 09:41:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:11,181 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-23 09:41:11,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-23 09:41:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-23 09:41:11,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-23 09:41:11,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:11,182 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:11,182 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:11,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:11,183 INFO L82 PathProgramCache]: Analyzing trace with hash -933493909, now seen corresponding path program 45 times [2018-10-23 09:41:11,183 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:11,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:11,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:11,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:11,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:11,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:12,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:12,719 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:12,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:12,832 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-23 09:41:12,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:12,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:13,012 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:13,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-23 09:41:13,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-23 09:41:13,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-23 09:41:13,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2018-10-23 09:41:13,014 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-10-23 09:41:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:13,184 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-23 09:41:13,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-23 09:41:13,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-23 09:41:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:13,186 INFO L225 Difference]: With dead ends: 151 [2018-10-23 09:41:13,186 INFO L226 Difference]: Without dead ends: 147 [2018-10-23 09:41:13,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1316, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:41:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-23 09:41:13,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-23 09:41:13,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-23 09:41:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-23 09:41:13,190 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-23 09:41:13,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:13,190 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-23 09:41:13,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-23 09:41:13,191 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-23 09:41:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-23 09:41:13,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:13,191 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:13,192 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:13,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:13,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1839610256, now seen corresponding path program 46 times [2018-10-23 09:41:13,192 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:13,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:13,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:13,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:13,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:14,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:14,279 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:14,287 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:14,362 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:14,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:14,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:14,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:14,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-23 09:41:14,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-23 09:41:14,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-23 09:41:14,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2018-10-23 09:41:14,653 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-10-23 09:41:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:14,967 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-23 09:41:14,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-23 09:41:14,967 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-10-23 09:41:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:14,968 INFO L225 Difference]: With dead ends: 154 [2018-10-23 09:41:14,968 INFO L226 Difference]: Without dead ends: 150 [2018-10-23 09:41:14,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1182, Invalid=1368, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:41:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-23 09:41:14,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-23 09:41:14,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-23 09:41:14,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-23 09:41:14,971 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-23 09:41:14,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:14,972 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-23 09:41:14,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-23 09:41:14,972 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-23 09:41:14,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-23 09:41:14,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:14,973 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:14,973 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:14,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1689851211, now seen corresponding path program 47 times [2018-10-23 09:41:14,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:14,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:14,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:14,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:14,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:16,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:16,117 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:16,124 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:16,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-23 09:41:16,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:16,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:16,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:16,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-23 09:41:16,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-23 09:41:16,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-23 09:41:16,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2018-10-23 09:41:16,447 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-10-23 09:41:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:16,567 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-23 09:41:16,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-23 09:41:16,568 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-10-23 09:41:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:16,568 INFO L225 Difference]: With dead ends: 157 [2018-10-23 09:41:16,569 INFO L226 Difference]: Without dead ends: 153 [2018-10-23 09:41:16,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-23 09:41:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-23 09:41:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-23 09:41:16,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-23 09:41:16,573 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-23 09:41:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:16,574 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-23 09:41:16,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-23 09:41:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-23 09:41:16,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-23 09:41:16,575 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:16,575 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:16,575 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:16,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:16,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1605805136, now seen corresponding path program 48 times [2018-10-23 09:41:16,576 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:16,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:16,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:16,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:16,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:17,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:17,606 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:17,613 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:17,727 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-23 09:41:17,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:17,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:17,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:17,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-23 09:41:17,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-23 09:41:17,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-23 09:41:17,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2018-10-23 09:41:17,836 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 52 states. [2018-10-23 09:41:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:17,965 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-10-23 09:41:17,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-23 09:41:17,966 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2018-10-23 09:41:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:17,966 INFO L225 Difference]: With dead ends: 160 [2018-10-23 09:41:17,966 INFO L226 Difference]: Without dead ends: 156 [2018-10-23 09:41:17,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1281, Invalid=1475, Unknown=0, NotChecked=0, Total=2756 [2018-10-23 09:41:17,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-23 09:41:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2018-10-23 09:41:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-23 09:41:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-23 09:41:17,970 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 151 [2018-10-23 09:41:17,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:17,971 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-23 09:41:17,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-23 09:41:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-23 09:41:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-23 09:41:17,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:17,972 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:17,972 INFO L424 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:17,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:17,973 INFO L82 PathProgramCache]: Analyzing trace with hash 448347947, now seen corresponding path program 49 times [2018-10-23 09:41:17,973 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:17,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:17,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:17,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:19,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:19,039 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:19,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:19,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:19,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:19,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-23 09:41:19,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-23 09:41:19,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-23 09:41:19,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2018-10-23 09:41:19,423 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 53 states. [2018-10-23 09:41:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:19,515 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-23 09:41:19,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-23 09:41:19,515 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2018-10-23 09:41:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:19,517 INFO L225 Difference]: With dead ends: 163 [2018-10-23 09:41:19,517 INFO L226 Difference]: Without dead ends: 159 [2018-10-23 09:41:19,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1332, Invalid=1530, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:41:19,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-23 09:41:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2018-10-23 09:41:19,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-23 09:41:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-23 09:41:19,522 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 154 [2018-10-23 09:41:19,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:19,522 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-23 09:41:19,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-23 09:41:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-23 09:41:19,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-23 09:41:19,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:19,523 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:19,524 INFO L424 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:19,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:19,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1028810192, now seen corresponding path program 50 times [2018-10-23 09:41:19,524 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:19,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:19,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:19,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:20,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:20,964 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:20,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:21,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:21,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:21,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3775 backedges. 0 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:21,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:21,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-23 09:41:21,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-23 09:41:21,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-23 09:41:21,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2018-10-23 09:41:21,196 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 54 states. [2018-10-23 09:41:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:21,341 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-10-23 09:41:21,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-23 09:41:21,342 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 157 [2018-10-23 09:41:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:21,343 INFO L225 Difference]: With dead ends: 166 [2018-10-23 09:41:21,343 INFO L226 Difference]: Without dead ends: 162 [2018-10-23 09:41:21,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1384, Invalid=1586, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:41:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-23 09:41:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-23 09:41:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-23 09:41:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-23 09:41:21,347 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 157 [2018-10-23 09:41:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:21,347 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-23 09:41:21,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-23 09:41:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-23 09:41:21,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-23 09:41:21,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:21,348 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:21,349 INFO L424 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:21,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:21,349 INFO L82 PathProgramCache]: Analyzing trace with hash 2041217291, now seen corresponding path program 51 times [2018-10-23 09:41:21,349 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:21,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:21,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:21,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:21,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:22,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:22,575 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:22,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:22,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-23 09:41:22,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:22,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:23,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3927 backedges. 0 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:23,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:23,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-23 09:41:23,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-23 09:41:23,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-23 09:41:23,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2018-10-23 09:41:23,132 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 55 states. [2018-10-23 09:41:23,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:23,306 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-23 09:41:23,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-23 09:41:23,306 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2018-10-23 09:41:23,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:23,307 INFO L225 Difference]: With dead ends: 169 [2018-10-23 09:41:23,307 INFO L226 Difference]: Without dead ends: 165 [2018-10-23 09:41:23,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1437, Invalid=1643, Unknown=0, NotChecked=0, Total=3080 [2018-10-23 09:41:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-23 09:41:23,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2018-10-23 09:41:23,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-23 09:41:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-10-23 09:41:23,311 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 160 [2018-10-23 09:41:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:23,312 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-10-23 09:41:23,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-23 09:41:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-10-23 09:41:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-23 09:41:23,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:23,313 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:23,313 INFO L424 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:23,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash -894216208, now seen corresponding path program 52 times [2018-10-23 09:41:23,313 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:23,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:23,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:23,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:23,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:24,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:24,434 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:24,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:24,526 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:24,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:24,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:24,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:24,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-23 09:41:24,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-23 09:41:24,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-23 09:41:24,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2018-10-23 09:41:24,900 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 56 states. [2018-10-23 09:41:25,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:25,046 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-23 09:41:25,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-23 09:41:25,046 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 163 [2018-10-23 09:41:25,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:25,047 INFO L225 Difference]: With dead ends: 172 [2018-10-23 09:41:25,047 INFO L226 Difference]: Without dead ends: 168 [2018-10-23 09:41:25,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1491, Invalid=1701, Unknown=0, NotChecked=0, Total=3192 [2018-10-23 09:41:25,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-23 09:41:25,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2018-10-23 09:41:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-23 09:41:25,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-23 09:41:25,050 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 163 [2018-10-23 09:41:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:25,050 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-23 09:41:25,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-23 09:41:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-23 09:41:25,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-23 09:41:25,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:25,051 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:25,052 INFO L424 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:25,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash -564471061, now seen corresponding path program 53 times [2018-10-23 09:41:25,052 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:25,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:25,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:25,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:25,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:26,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:26,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:26,471 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:26,479 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:26,604 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-23 09:41:26,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:26,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4240 backedges. 0 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:27,355 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:27,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-23 09:41:27,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-23 09:41:27,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-23 09:41:27,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2018-10-23 09:41:27,357 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 57 states. [2018-10-23 09:41:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:27,887 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-23 09:41:27,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-23 09:41:27,888 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2018-10-23 09:41:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:27,889 INFO L225 Difference]: With dead ends: 175 [2018-10-23 09:41:27,889 INFO L226 Difference]: Without dead ends: 171 [2018-10-23 09:41:27,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1546, Invalid=1760, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:41:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-23 09:41:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2018-10-23 09:41:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-23 09:41:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-10-23 09:41:27,893 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 166 [2018-10-23 09:41:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:27,893 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-10-23 09:41:27,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-23 09:41:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-10-23 09:41:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-10-23 09:41:27,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:27,894 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:27,894 INFO L424 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:27,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:27,895 INFO L82 PathProgramCache]: Analyzing trace with hash 282997264, now seen corresponding path program 54 times [2018-10-23 09:41:27,895 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:27,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:27,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:27,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:29,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:29,312 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:29,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:29,445 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-23 09:41:29,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:29,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4401 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:29,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:29,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-23 09:41:29,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-23 09:41:29,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-23 09:41:29,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2018-10-23 09:41:29,563 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 58 states. [2018-10-23 09:41:29,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:29,673 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-10-23 09:41:29,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-23 09:41:29,674 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 169 [2018-10-23 09:41:29,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:29,675 INFO L225 Difference]: With dead ends: 178 [2018-10-23 09:41:29,675 INFO L226 Difference]: Without dead ends: 174 [2018-10-23 09:41:29,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1602, Invalid=1820, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:41:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-23 09:41:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2018-10-23 09:41:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-23 09:41:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-23 09:41:29,679 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 169 [2018-10-23 09:41:29,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:29,679 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-23 09:41:29,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-23 09:41:29,679 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-23 09:41:29,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-23 09:41:29,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:29,680 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:29,681 INFO L424 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:29,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1394101451, now seen corresponding path program 55 times [2018-10-23 09:41:29,681 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:29,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:29,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:29,682 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:29,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:31,224 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:31,225 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:31,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:31,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:31,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:31,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-23 09:41:31,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-23 09:41:31,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-23 09:41:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2018-10-23 09:41:31,659 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 59 states. [2018-10-23 09:41:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:31,782 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-23 09:41:31,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-23 09:41:31,782 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 172 [2018-10-23 09:41:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:31,784 INFO L225 Difference]: With dead ends: 181 [2018-10-23 09:41:31,784 INFO L226 Difference]: Without dead ends: 177 [2018-10-23 09:41:31,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1659, Invalid=1881, Unknown=0, NotChecked=0, Total=3540 [2018-10-23 09:41:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-23 09:41:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2018-10-23 09:41:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-23 09:41:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-10-23 09:41:31,788 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 172 [2018-10-23 09:41:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:31,789 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-10-23 09:41:31,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-23 09:41:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-10-23 09:41:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-23 09:41:31,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:31,790 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:31,790 INFO L424 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:31,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash 985986096, now seen corresponding path program 56 times [2018-10-23 09:41:31,791 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:31,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:31,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:31,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:31,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:33,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:33,060 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:33,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:33,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:33,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:33,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:33,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:33,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-23 09:41:33,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-23 09:41:33,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-23 09:41:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2018-10-23 09:41:33,257 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 60 states. [2018-10-23 09:41:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:33,397 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2018-10-23 09:41:33,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-23 09:41:33,397 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 175 [2018-10-23 09:41:33,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:33,399 INFO L225 Difference]: With dead ends: 184 [2018-10-23 09:41:33,399 INFO L226 Difference]: Without dead ends: 180 [2018-10-23 09:41:33,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1717, Invalid=1943, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:41:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-23 09:41:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2018-10-23 09:41:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-23 09:41:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-23 09:41:33,403 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 175 [2018-10-23 09:41:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:33,404 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-23 09:41:33,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-23 09:41:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-23 09:41:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-23 09:41:33,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:33,405 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:33,405 INFO L424 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:33,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:33,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1873860267, now seen corresponding path program 57 times [2018-10-23 09:41:33,406 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:33,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:33,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:33,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:33,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:34,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:34,786 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:34,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:34,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-23 09:41:34,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:34,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4902 backedges. 0 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:35,060 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:35,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-23 09:41:35,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-23 09:41:35,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-23 09:41:35,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2018-10-23 09:41:35,061 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 61 states. [2018-10-23 09:41:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:35,211 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-23 09:41:35,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-23 09:41:35,211 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 178 [2018-10-23 09:41:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:35,213 INFO L225 Difference]: With dead ends: 187 [2018-10-23 09:41:35,213 INFO L226 Difference]: Without dead ends: 183 [2018-10-23 09:41:35,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1776, Invalid=2006, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:41:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-23 09:41:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2018-10-23 09:41:35,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-23 09:41:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2018-10-23 09:41:35,217 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 178 [2018-10-23 09:41:35,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:35,217 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2018-10-23 09:41:35,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-23 09:41:35,217 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2018-10-23 09:41:35,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-23 09:41:35,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:35,218 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:35,219 INFO L424 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:35,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:35,219 INFO L82 PathProgramCache]: Analyzing trace with hash -170287536, now seen corresponding path program 58 times [2018-10-23 09:41:35,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:35,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:35,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:35,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:35,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:36,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:36,907 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:36,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:37,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:37,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:37,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:37,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:37,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-23 09:41:37,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-23 09:41:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-23 09:41:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2018-10-23 09:41:37,167 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 62 states. [2018-10-23 09:41:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:37,293 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2018-10-23 09:41:37,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-23 09:41:37,294 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 181 [2018-10-23 09:41:37,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:37,297 INFO L225 Difference]: With dead ends: 190 [2018-10-23 09:41:37,297 INFO L226 Difference]: Without dead ends: 186 [2018-10-23 09:41:37,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1836, Invalid=2070, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:41:37,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-23 09:41:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-23 09:41:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-23 09:41:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-23 09:41:37,302 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 181 [2018-10-23 09:41:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:37,302 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-23 09:41:37,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-23 09:41:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-23 09:41:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-23 09:41:37,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:37,304 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:37,304 INFO L424 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:37,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:37,304 INFO L82 PathProgramCache]: Analyzing trace with hash 963803275, now seen corresponding path program 59 times [2018-10-23 09:41:37,304 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:37,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:37,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:37,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:37,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:38,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:38,784 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:38,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:38,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-23 09:41:38,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:38,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5251 backedges. 0 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:39,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:39,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-23 09:41:39,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-23 09:41:39,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-23 09:41:39,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2018-10-23 09:41:39,111 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 63 states. [2018-10-23 09:41:39,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:39,275 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-23 09:41:39,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-23 09:41:39,275 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 184 [2018-10-23 09:41:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:39,276 INFO L225 Difference]: With dead ends: 193 [2018-10-23 09:41:39,277 INFO L226 Difference]: Without dead ends: 189 [2018-10-23 09:41:39,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1897, Invalid=2135, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:41:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-23 09:41:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2018-10-23 09:41:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-23 09:41:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-23 09:41:39,280 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 184 [2018-10-23 09:41:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:39,281 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-23 09:41:39,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-23 09:41:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-23 09:41:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-23 09:41:39,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:39,282 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:39,282 INFO L424 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:39,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1844563856, now seen corresponding path program 60 times [2018-10-23 09:41:39,282 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:39,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:39,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:39,283 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:39,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:41,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:41,012 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:41,019 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:41,163 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-23 09:41:41,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:41,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5430 backedges. 0 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:41,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:41,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-23 09:41:41,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-23 09:41:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-23 09:41:41,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2018-10-23 09:41:41,263 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 64 states. [2018-10-23 09:41:41,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:41,431 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2018-10-23 09:41:41,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-23 09:41:41,431 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 187 [2018-10-23 09:41:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:41,432 INFO L225 Difference]: With dead ends: 196 [2018-10-23 09:41:41,432 INFO L226 Difference]: Without dead ends: 192 [2018-10-23 09:41:41,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1959, Invalid=2201, Unknown=0, NotChecked=0, Total=4160 [2018-10-23 09:41:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-23 09:41:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2018-10-23 09:41:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-23 09:41:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-23 09:41:41,435 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 187 [2018-10-23 09:41:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:41,436 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-23 09:41:41,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-23 09:41:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-23 09:41:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-23 09:41:41,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:41,437 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:41,437 INFO L424 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:41,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:41,437 INFO L82 PathProgramCache]: Analyzing trace with hash 53162603, now seen corresponding path program 61 times [2018-10-23 09:41:41,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:41,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:41,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:41,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:41,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:43,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:43,053 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:43,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:43,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:43,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:43,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:43,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-23 09:41:43,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-23 09:41:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-23 09:41:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2018-10-23 09:41:43,268 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 65 states. [2018-10-23 09:41:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:43,425 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-23 09:41:43,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-23 09:41:43,426 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 190 [2018-10-23 09:41:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:43,427 INFO L225 Difference]: With dead ends: 199 [2018-10-23 09:41:43,427 INFO L226 Difference]: Without dead ends: 195 [2018-10-23 09:41:43,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2022, Invalid=2268, Unknown=0, NotChecked=0, Total=4290 [2018-10-23 09:41:43,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-23 09:41:43,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2018-10-23 09:41:43,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2018-10-23 09:41:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 194 transitions. [2018-10-23 09:41:43,431 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 194 transitions. Word has length 190 [2018-10-23 09:41:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:43,431 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 194 transitions. [2018-10-23 09:41:43,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-23 09:41:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 194 transitions. [2018-10-23 09:41:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-23 09:41:43,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:43,432 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:43,432 INFO L424 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:43,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:43,433 INFO L82 PathProgramCache]: Analyzing trace with hash 567585424, now seen corresponding path program 62 times [2018-10-23 09:41:43,433 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:43,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:43,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:43,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:43,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:44,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:44,980 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:44,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:45,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:45,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:45,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:45,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5797 backedges. 0 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:45,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:45,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-23 09:41:45,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-23 09:41:45,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-23 09:41:45,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2018-10-23 09:41:45,200 INFO L87 Difference]: Start difference. First operand 194 states and 194 transitions. Second operand 66 states. [2018-10-23 09:41:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:45,351 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-23 09:41:45,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-23 09:41:45,352 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 193 [2018-10-23 09:41:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:45,353 INFO L225 Difference]: With dead ends: 202 [2018-10-23 09:41:45,353 INFO L226 Difference]: Without dead ends: 198 [2018-10-23 09:41:45,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2086, Invalid=2336, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:41:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-10-23 09:41:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2018-10-23 09:41:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-23 09:41:45,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-23 09:41:45,357 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 193 [2018-10-23 09:41:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:45,358 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-23 09:41:45,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-23 09:41:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-23 09:41:45,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-23 09:41:45,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:45,359 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:45,359 INFO L424 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:45,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:45,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1294533707, now seen corresponding path program 63 times [2018-10-23 09:41:45,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:45,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:45,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:45,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:47,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:47,226 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:47,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:41:47,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-23 09:41:47,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:47,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:47,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5985 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:47,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:47,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-23 09:41:47,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-23 09:41:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-23 09:41:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2018-10-23 09:41:47,511 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 67 states. [2018-10-23 09:41:47,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:47,710 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-23 09:41:47,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-23 09:41:47,710 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 196 [2018-10-23 09:41:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:47,711 INFO L225 Difference]: With dead ends: 205 [2018-10-23 09:41:47,711 INFO L226 Difference]: Without dead ends: 201 [2018-10-23 09:41:47,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2151, Invalid=2405, Unknown=0, NotChecked=0, Total=4556 [2018-10-23 09:41:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-23 09:41:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2018-10-23 09:41:47,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-23 09:41:47,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 200 transitions. [2018-10-23 09:41:47,716 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 200 transitions. Word has length 196 [2018-10-23 09:41:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:47,716 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 200 transitions. [2018-10-23 09:41:47,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-23 09:41:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 200 transitions. [2018-10-23 09:41:47,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2018-10-23 09:41:47,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:47,718 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:47,718 INFO L424 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:47,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:47,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1709241168, now seen corresponding path program 64 times [2018-10-23 09:41:47,719 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:47,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:47,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:47,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:47,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:49,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:49,509 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:49,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:41:49,622 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:41:49,622 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:49,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:49,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:49,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-23 09:41:49,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-23 09:41:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-23 09:41:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2018-10-23 09:41:49,799 INFO L87 Difference]: Start difference. First operand 200 states and 200 transitions. Second operand 68 states. [2018-10-23 09:41:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:49,988 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-10-23 09:41:49,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-23 09:41:49,988 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 199 [2018-10-23 09:41:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:49,989 INFO L225 Difference]: With dead ends: 208 [2018-10-23 09:41:49,989 INFO L226 Difference]: Without dead ends: 204 [2018-10-23 09:41:49,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2217, Invalid=2475, Unknown=0, NotChecked=0, Total=4692 [2018-10-23 09:41:49,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-23 09:41:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2018-10-23 09:41:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-23 09:41:49,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-23 09:41:49,993 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 199 [2018-10-23 09:41:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:49,993 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-23 09:41:49,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-23 09:41:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-23 09:41:49,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-23 09:41:49,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:49,994 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:49,994 INFO L424 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:49,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:49,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1522930133, now seen corresponding path program 65 times [2018-10-23 09:41:49,995 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:49,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:49,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:49,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:49,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:51,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:51,880 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:51,887 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:41:52,045 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-23 09:41:52,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:52,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6370 backedges. 0 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:52,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:52,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-23 09:41:52,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-23 09:41:52,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-23 09:41:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2018-10-23 09:41:52,435 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 69 states. [2018-10-23 09:41:52,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:52,569 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-23 09:41:52,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-23 09:41:52,569 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 202 [2018-10-23 09:41:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:52,571 INFO L225 Difference]: With dead ends: 211 [2018-10-23 09:41:52,571 INFO L226 Difference]: Without dead ends: 207 [2018-10-23 09:41:52,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2284, Invalid=2546, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:41:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-23 09:41:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2018-10-23 09:41:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-23 09:41:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 206 transitions. [2018-10-23 09:41:52,575 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 206 transitions. Word has length 202 [2018-10-23 09:41:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:52,575 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 206 transitions. [2018-10-23 09:41:52,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-23 09:41:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 206 transitions. [2018-10-23 09:41:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2018-10-23 09:41:52,576 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:52,576 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:52,576 INFO L424 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:52,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash -228632880, now seen corresponding path program 66 times [2018-10-23 09:41:52,577 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:52,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:52,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:52,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:54,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:54,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:54,294 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:54,301 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:41:54,469 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-23 09:41:54,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:54,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6567 backedges. 0 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:54,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:54,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-23 09:41:54,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-23 09:41:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-23 09:41:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2018-10-23 09:41:54,582 INFO L87 Difference]: Start difference. First operand 206 states and 206 transitions. Second operand 70 states. [2018-10-23 09:41:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:54,783 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2018-10-23 09:41:54,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-23 09:41:54,783 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 205 [2018-10-23 09:41:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:54,784 INFO L225 Difference]: With dead ends: 214 [2018-10-23 09:41:54,784 INFO L226 Difference]: Without dead ends: 210 [2018-10-23 09:41:54,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2352, Invalid=2618, Unknown=0, NotChecked=0, Total=4970 [2018-10-23 09:41:54,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-23 09:41:54,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-23 09:41:54,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-23 09:41:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-23 09:41:54,788 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 205 [2018-10-23 09:41:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:54,789 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-23 09:41:54,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-23 09:41:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-23 09:41:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-23 09:41:54,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:54,790 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:54,790 INFO L424 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:54,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:54,790 INFO L82 PathProgramCache]: Analyzing trace with hash -2035552245, now seen corresponding path program 67 times [2018-10-23 09:41:54,790 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:54,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:54,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:54,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:56,830 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:56,830 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:56,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:56,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:57,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:57,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-23 09:41:57,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-23 09:41:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-23 09:41:57,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2018-10-23 09:41:57,075 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 71 states. [2018-10-23 09:41:57,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:57,312 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-23 09:41:57,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-23 09:41:57,312 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 208 [2018-10-23 09:41:57,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:57,313 INFO L225 Difference]: With dead ends: 217 [2018-10-23 09:41:57,313 INFO L226 Difference]: Without dead ends: 213 [2018-10-23 09:41:57,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2421, Invalid=2691, Unknown=0, NotChecked=0, Total=5112 [2018-10-23 09:41:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-23 09:41:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2018-10-23 09:41:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2018-10-23 09:41:57,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2018-10-23 09:41:57,317 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 208 [2018-10-23 09:41:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:57,318 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2018-10-23 09:41:57,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-23 09:41:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2018-10-23 09:41:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2018-10-23 09:41:57,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:57,319 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:57,319 INFO L424 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:57,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1149733104, now seen corresponding path program 68 times [2018-10-23 09:41:57,320 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:57,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:57,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:57,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:41:57,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:41:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:59,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:41:59,203 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:41:59,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:41:59,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:41:59,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:41:59,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:41:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6970 backedges. 0 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:41:59,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:41:59,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-23 09:41:59,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-23 09:41:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-23 09:41:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2018-10-23 09:41:59,436 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 72 states. [2018-10-23 09:41:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:41:59,608 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2018-10-23 09:41:59,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-23 09:41:59,608 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 211 [2018-10-23 09:41:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:41:59,609 INFO L225 Difference]: With dead ends: 220 [2018-10-23 09:41:59,609 INFO L226 Difference]: Without dead ends: 216 [2018-10-23 09:41:59,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2491, Invalid=2765, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:41:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-23 09:41:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2018-10-23 09:41:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-23 09:41:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-23 09:41:59,614 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 211 [2018-10-23 09:41:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:41:59,614 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-23 09:41:59,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-23 09:41:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-23 09:41:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-23 09:41:59,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:41:59,615 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 1, 1, 1, 1, 1, 1] [2018-10-23 09:41:59,616 INFO L424 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:41:59,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:41:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash 978127339, now seen corresponding path program 69 times [2018-10-23 09:41:59,616 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:41:59,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:41:59,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:59,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:41:59,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:41:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:01,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:01,767 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:01,774 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:01,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-23 09:42:01,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:01,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7176 backedges. 0 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:02,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:02,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-23 09:42:02,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-23 09:42:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-23 09:42:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2018-10-23 09:42:02,105 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 73 states. [2018-10-23 09:42:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:02,288 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-23 09:42:02,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-23 09:42:02,289 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 214 [2018-10-23 09:42:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:02,290 INFO L225 Difference]: With dead ends: 223 [2018-10-23 09:42:02,290 INFO L226 Difference]: Without dead ends: 219 [2018-10-23 09:42:02,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2562, Invalid=2840, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:42:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-23 09:42:02,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2018-10-23 09:42:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-23 09:42:02,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-23 09:42:02,293 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 214 [2018-10-23 09:42:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:02,294 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-23 09:42:02,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-23 09:42:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-23 09:42:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-23 09:42:02,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:02,295 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:02,295 INFO L424 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:02,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -318135536, now seen corresponding path program 70 times [2018-10-23 09:42:02,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:02,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:02,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:02,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:02,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:04,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:04,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:04,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:04,334 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:04,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:04,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:04,459 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:04,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-23 09:42:04,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-23 09:42:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-23 09:42:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2018-10-23 09:42:04,460 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 74 states. [2018-10-23 09:42:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:04,689 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2018-10-23 09:42:04,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-23 09:42:04,689 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 217 [2018-10-23 09:42:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:04,690 INFO L225 Difference]: With dead ends: 226 [2018-10-23 09:42:04,690 INFO L226 Difference]: Without dead ends: 222 [2018-10-23 09:42:04,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2634, Invalid=2916, Unknown=0, NotChecked=0, Total=5550 [2018-10-23 09:42:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-23 09:42:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2018-10-23 09:42:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-23 09:42:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-23 09:42:04,694 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 217 [2018-10-23 09:42:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:04,694 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-23 09:42:04,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-23 09:42:04,694 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-23 09:42:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-23 09:42:04,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:04,695 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:04,695 INFO L424 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:04,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:04,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1234486325, now seen corresponding path program 71 times [2018-10-23 09:42:04,696 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:04,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:04,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:04,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:04,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:07,044 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:07,044 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:07,051 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:07,234 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-23 09:42:07,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:07,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7597 backedges. 0 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:07,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:07,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-23 09:42:07,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-23 09:42:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-23 09:42:07,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2018-10-23 09:42:07,362 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 75 states. [2018-10-23 09:42:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:07,606 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-10-23 09:42:07,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-23 09:42:07,607 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 220 [2018-10-23 09:42:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:07,608 INFO L225 Difference]: With dead ends: 229 [2018-10-23 09:42:07,608 INFO L226 Difference]: Without dead ends: 225 [2018-10-23 09:42:07,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2707, Invalid=2993, Unknown=0, NotChecked=0, Total=5700 [2018-10-23 09:42:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-23 09:42:07,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2018-10-23 09:42:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-23 09:42:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 224 transitions. [2018-10-23 09:42:07,611 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 224 transitions. Word has length 220 [2018-10-23 09:42:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:07,612 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 224 transitions. [2018-10-23 09:42:07,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-23 09:42:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 224 transitions. [2018-10-23 09:42:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-23 09:42:07,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:07,613 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:07,613 INFO L424 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:07,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:07,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1428708048, now seen corresponding path program 72 times [2018-10-23 09:42:07,613 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:07,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:07,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:07,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:09,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:09,613 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:09,620 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:09,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-23 09:42:09,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:09,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:09,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:09,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-23 09:42:09,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-23 09:42:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-23 09:42:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2018-10-23 09:42:09,928 INFO L87 Difference]: Start difference. First operand 224 states and 224 transitions. Second operand 76 states. [2018-10-23 09:42:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:10,099 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-23 09:42:10,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-23 09:42:10,100 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 223 [2018-10-23 09:42:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:10,101 INFO L225 Difference]: With dead ends: 232 [2018-10-23 09:42:10,101 INFO L226 Difference]: Without dead ends: 228 [2018-10-23 09:42:10,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2781, Invalid=3071, Unknown=0, NotChecked=0, Total=5852 [2018-10-23 09:42:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-23 09:42:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2018-10-23 09:42:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-23 09:42:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-10-23 09:42:10,106 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 223 [2018-10-23 09:42:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:10,106 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-10-23 09:42:10,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-23 09:42:10,107 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-10-23 09:42:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-23 09:42:10,108 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:10,108 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:10,108 INFO L424 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:10,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:10,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2127857067, now seen corresponding path program 73 times [2018-10-23 09:42:10,109 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:10,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:10,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:10,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:10,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:12,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:12,550 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:12,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:12,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:12,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:12,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-23 09:42:12,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-23 09:42:12,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-23 09:42:12,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2018-10-23 09:42:12,811 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 77 states. [2018-10-23 09:42:13,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:13,077 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-10-23 09:42:13,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-23 09:42:13,077 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 226 [2018-10-23 09:42:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:13,078 INFO L225 Difference]: With dead ends: 235 [2018-10-23 09:42:13,078 INFO L226 Difference]: Without dead ends: 231 [2018-10-23 09:42:13,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 226 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2856, Invalid=3150, Unknown=0, NotChecked=0, Total=6006 [2018-10-23 09:42:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-23 09:42:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2018-10-23 09:42:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-23 09:42:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 230 transitions. [2018-10-23 09:42:13,083 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 230 transitions. Word has length 226 [2018-10-23 09:42:13,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:13,083 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 230 transitions. [2018-10-23 09:42:13,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-23 09:42:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 230 transitions. [2018-10-23 09:42:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-23 09:42:13,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:13,085 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:13,085 INFO L424 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:13,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1083994288, now seen corresponding path program 74 times [2018-10-23 09:42:13,086 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:13,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:13,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:13,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:13,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:15,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:15,199 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:15,207 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:15,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:15,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:15,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:15,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8251 backedges. 0 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:15,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:15,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-23 09:42:15,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-23 09:42:15,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-23 09:42:15,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2018-10-23 09:42:15,455 INFO L87 Difference]: Start difference. First operand 230 states and 230 transitions. Second operand 78 states. [2018-10-23 09:42:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:15,712 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-10-23 09:42:15,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-23 09:42:15,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 229 [2018-10-23 09:42:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:15,713 INFO L225 Difference]: With dead ends: 238 [2018-10-23 09:42:15,713 INFO L226 Difference]: Without dead ends: 234 [2018-10-23 09:42:15,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2932, Invalid=3230, Unknown=0, NotChecked=0, Total=6162 [2018-10-23 09:42:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-23 09:42:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-10-23 09:42:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-23 09:42:15,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-10-23 09:42:15,717 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 229 [2018-10-23 09:42:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:15,718 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-10-23 09:42:15,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-23 09:42:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-10-23 09:42:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-23 09:42:15,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:15,719 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:15,719 INFO L424 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:15,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2066290805, now seen corresponding path program 75 times [2018-10-23 09:42:15,720 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:15,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:15,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:15,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:15,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:18,213 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:18,213 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:18,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:18,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-23 09:42:18,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:18,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8475 backedges. 0 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:18,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:18,563 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-23 09:42:18,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-23 09:42:18,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-23 09:42:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2018-10-23 09:42:18,565 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 79 states. [2018-10-23 09:42:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:19,662 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-10-23 09:42:19,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-23 09:42:19,662 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 232 [2018-10-23 09:42:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:19,663 INFO L225 Difference]: With dead ends: 241 [2018-10-23 09:42:19,663 INFO L226 Difference]: Without dead ends: 237 [2018-10-23 09:42:19,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3009, Invalid=3311, Unknown=0, NotChecked=0, Total=6320 [2018-10-23 09:42:19,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-23 09:42:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2018-10-23 09:42:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-23 09:42:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 236 transitions. [2018-10-23 09:42:19,668 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 236 transitions. Word has length 232 [2018-10-23 09:42:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:19,668 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 236 transitions. [2018-10-23 09:42:19,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-23 09:42:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 236 transitions. [2018-10-23 09:42:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2018-10-23 09:42:19,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:19,669 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:19,669 INFO L424 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:19,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash 245326192, now seen corresponding path program 76 times [2018-10-23 09:42:19,670 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:19,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:19,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:19,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:19,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:22,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:22,297 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:22,304 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:22,424 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:22,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:22,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:22,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:22,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:22,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-23 09:42:22,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-23 09:42:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-23 09:42:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2018-10-23 09:42:22,552 INFO L87 Difference]: Start difference. First operand 236 states and 236 transitions. Second operand 80 states. [2018-10-23 09:42:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:22,738 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2018-10-23 09:42:22,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-23 09:42:22,739 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 235 [2018-10-23 09:42:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:22,740 INFO L225 Difference]: With dead ends: 244 [2018-10-23 09:42:22,740 INFO L226 Difference]: Without dead ends: 240 [2018-10-23 09:42:22,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3087, Invalid=3393, Unknown=0, NotChecked=0, Total=6480 [2018-10-23 09:42:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-10-23 09:42:22,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2018-10-23 09:42:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-10-23 09:42:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-10-23 09:42:22,743 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 235 [2018-10-23 09:42:22,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:22,744 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-10-23 09:42:22,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-23 09:42:22,744 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-10-23 09:42:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-23 09:42:22,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:22,745 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:22,745 INFO L424 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:22,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:22,745 INFO L82 PathProgramCache]: Analyzing trace with hash 121659755, now seen corresponding path program 77 times [2018-10-23 09:42:22,745 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:22,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:22,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:22,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:22,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:25,125 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:25,126 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:25,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:25,341 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-23 09:42:25,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:25,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 8932 backedges. 0 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:25,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:25,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-23 09:42:25,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-23 09:42:25,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-23 09:42:25,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2018-10-23 09:42:25,469 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 81 states. [2018-10-23 09:42:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:25,707 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-10-23 09:42:25,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-23 09:42:25,707 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 238 [2018-10-23 09:42:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:25,708 INFO L225 Difference]: With dead ends: 247 [2018-10-23 09:42:25,708 INFO L226 Difference]: Without dead ends: 243 [2018-10-23 09:42:25,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3166, Invalid=3476, Unknown=0, NotChecked=0, Total=6642 [2018-10-23 09:42:25,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-23 09:42:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2018-10-23 09:42:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2018-10-23 09:42:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2018-10-23 09:42:25,712 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 238 [2018-10-23 09:42:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:25,713 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2018-10-23 09:42:25,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-23 09:42:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2018-10-23 09:42:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2018-10-23 09:42:25,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:25,714 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:25,714 INFO L424 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:25,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1056775056, now seen corresponding path program 78 times [2018-10-23 09:42:25,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:25,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:25,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:25,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:25,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:28,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:28,391 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:28,398 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:28,617 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-23 09:42:28,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:28,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9165 backedges. 0 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:28,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:28,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-23 09:42:28,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-23 09:42:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-23 09:42:28,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2018-10-23 09:42:28,747 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 82 states. [2018-10-23 09:42:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:29,063 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2018-10-23 09:42:29,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-23 09:42:29,063 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 241 [2018-10-23 09:42:29,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:29,064 INFO L225 Difference]: With dead ends: 250 [2018-10-23 09:42:29,064 INFO L226 Difference]: Without dead ends: 246 [2018-10-23 09:42:29,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3246, Invalid=3560, Unknown=0, NotChecked=0, Total=6806 [2018-10-23 09:42:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-23 09:42:29,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2018-10-23 09:42:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-23 09:42:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-10-23 09:42:29,068 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 241 [2018-10-23 09:42:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-10-23 09:42:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-23 09:42:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-10-23 09:42:29,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-23 09:42:29,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:29,069 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:29,069 INFO L424 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:29,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:29,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1918825291, now seen corresponding path program 79 times [2018-10-23 09:42:29,069 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:29,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:29,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:29,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:29,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:31,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:31,503 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:31,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:31,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:31,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:31,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-23 09:42:31,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-23 09:42:31,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-23 09:42:31,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2018-10-23 09:42:31,773 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 83 states. [2018-10-23 09:42:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:32,148 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-10-23 09:42:32,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-23 09:42:32,149 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 244 [2018-10-23 09:42:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:32,150 INFO L225 Difference]: With dead ends: 253 [2018-10-23 09:42:32,150 INFO L226 Difference]: Without dead ends: 249 [2018-10-23 09:42:32,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3327, Invalid=3645, Unknown=0, NotChecked=0, Total=6972 [2018-10-23 09:42:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-23 09:42:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2018-10-23 09:42:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-10-23 09:42:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-10-23 09:42:32,155 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 244 [2018-10-23 09:42:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:32,155 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-10-23 09:42:32,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-23 09:42:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-10-23 09:42:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-23 09:42:32,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:32,156 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:32,156 INFO L424 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:32,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash -647053904, now seen corresponding path program 80 times [2018-10-23 09:42:32,157 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:32,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:32,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:32,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:32,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:34,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:34,661 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:34,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:34,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:34,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:34,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9640 backedges. 0 proven. 9640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:35,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:35,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-23 09:42:35,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-23 09:42:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-23 09:42:35,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2018-10-23 09:42:35,002 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 84 states. [2018-10-23 09:42:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:35,343 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2018-10-23 09:42:35,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-23 09:42:35,343 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 247 [2018-10-23 09:42:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:35,344 INFO L225 Difference]: With dead ends: 256 [2018-10-23 09:42:35,344 INFO L226 Difference]: Without dead ends: 252 [2018-10-23 09:42:35,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3409, Invalid=3731, Unknown=0, NotChecked=0, Total=7140 [2018-10-23 09:42:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2018-10-23 09:42:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2018-10-23 09:42:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-23 09:42:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-10-23 09:42:35,348 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 247 [2018-10-23 09:42:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:35,348 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-10-23 09:42:35,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-23 09:42:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-10-23 09:42:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-23 09:42:35,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:35,349 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:35,349 INFO L424 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:35,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:35,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1073782059, now seen corresponding path program 81 times [2018-10-23 09:42:35,349 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:35,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:35,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:35,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:35,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:38,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:38,046 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:38,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:38,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-23 09:42:38,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:38,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9882 backedges. 0 proven. 9882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:38,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:38,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-23 09:42:38,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-23 09:42:38,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-23 09:42:38,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2018-10-23 09:42:38,418 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 85 states. [2018-10-23 09:42:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:38,625 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-10-23 09:42:38,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-23 09:42:38,625 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 250 [2018-10-23 09:42:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:38,626 INFO L225 Difference]: With dead ends: 259 [2018-10-23 09:42:38,627 INFO L226 Difference]: Without dead ends: 255 [2018-10-23 09:42:38,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3492, Invalid=3818, Unknown=0, NotChecked=0, Total=7310 [2018-10-23 09:42:38,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-23 09:42:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2018-10-23 09:42:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2018-10-23 09:42:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 254 transitions. [2018-10-23 09:42:38,631 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 254 transitions. Word has length 250 [2018-10-23 09:42:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:38,631 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 254 transitions. [2018-10-23 09:42:38,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-23 09:42:38,631 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 254 transitions. [2018-10-23 09:42:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-23 09:42:38,632 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:38,632 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:38,632 INFO L424 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:38,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:38,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1768310736, now seen corresponding path program 82 times [2018-10-23 09:42:38,633 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:38,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:38,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:38,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:38,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:41,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:41,214 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:41,222 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:42:41,355 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:42:41,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:41,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:41,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:41,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-23 09:42:41,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-23 09:42:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-23 09:42:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2018-10-23 09:42:41,517 INFO L87 Difference]: Start difference. First operand 254 states and 254 transitions. Second operand 86 states. [2018-10-23 09:42:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:41,749 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2018-10-23 09:42:41,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-23 09:42:41,750 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 253 [2018-10-23 09:42:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:41,751 INFO L225 Difference]: With dead ends: 262 [2018-10-23 09:42:41,752 INFO L226 Difference]: Without dead ends: 258 [2018-10-23 09:42:41,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3576, Invalid=3906, Unknown=0, NotChecked=0, Total=7482 [2018-10-23 09:42:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-23 09:42:41,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-10-23 09:42:41,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-23 09:42:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-10-23 09:42:41,756 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 253 [2018-10-23 09:42:41,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:41,756 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-10-23 09:42:41,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-23 09:42:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-10-23 09:42:41,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-23 09:42:41,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:41,757 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:41,757 INFO L424 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:41,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash -680304885, now seen corresponding path program 83 times [2018-10-23 09:42:41,758 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:41,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:41,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:41,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:41,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:44,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:44,747 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 09:42:44,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:42:44,985 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-23 09:42:44,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:44,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10375 backedges. 0 proven. 10375 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:45,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:45,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-23 09:42:45,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-23 09:42:45,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-23 09:42:45,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2018-10-23 09:42:45,120 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 87 states. [2018-10-23 09:42:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:45,557 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-10-23 09:42:45,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-23 09:42:45,557 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 256 [2018-10-23 09:42:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:45,559 INFO L225 Difference]: With dead ends: 265 [2018-10-23 09:42:45,559 INFO L226 Difference]: Without dead ends: 261 [2018-10-23 09:42:45,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3661, Invalid=3995, Unknown=0, NotChecked=0, Total=7656 [2018-10-23 09:42:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-23 09:42:45,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2018-10-23 09:42:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-23 09:42:45,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 260 transitions. [2018-10-23 09:42:45,564 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 260 transitions. Word has length 256 [2018-10-23 09:42:45,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:45,564 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 260 transitions. [2018-10-23 09:42:45,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-23 09:42:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 260 transitions. [2018-10-23 09:42:45,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2018-10-23 09:42:45,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:45,566 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 84, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:45,566 INFO L424 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:45,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:45,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1663714832, now seen corresponding path program 84 times [2018-10-23 09:42:45,566 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:45,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:45,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:45,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:45,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:48,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:48,554 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:48,562 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:42:48,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-23 09:42:48,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:48,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:48,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10626 backedges. 0 proven. 10626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:48,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:48,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-23 09:42:48,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-23 09:42:48,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-23 09:42:48,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2018-10-23 09:42:48,933 INFO L87 Difference]: Start difference. First operand 260 states and 260 transitions. Second operand 88 states. [2018-10-23 09:42:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:49,141 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-10-23 09:42:49,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-23 09:42:49,141 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 259 [2018-10-23 09:42:49,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:49,143 INFO L225 Difference]: With dead ends: 268 [2018-10-23 09:42:49,143 INFO L226 Difference]: Without dead ends: 264 [2018-10-23 09:42:49,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3747, Invalid=4085, Unknown=0, NotChecked=0, Total=7832 [2018-10-23 09:42:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-23 09:42:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2018-10-23 09:42:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-10-23 09:42:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-10-23 09:42:49,149 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 259 [2018-10-23 09:42:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:49,149 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-10-23 09:42:49,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-23 09:42:49,149 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-10-23 09:42:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-23 09:42:49,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:49,151 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:49,151 INFO L424 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:49,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1837447403, now seen corresponding path program 85 times [2018-10-23 09:42:49,151 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:49,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:49,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:49,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:49,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:51,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:51,906 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:51,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:52,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10880 backedges. 0 proven. 10880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:52,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:52,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-23 09:42:52,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-23 09:42:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-23 09:42:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2018-10-23 09:42:52,216 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 89 states. [2018-10-23 09:42:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:52,515 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-10-23 09:42:52,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-23 09:42:52,515 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 262 [2018-10-23 09:42:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:52,516 INFO L225 Difference]: With dead ends: 271 [2018-10-23 09:42:52,516 INFO L226 Difference]: Without dead ends: 267 [2018-10-23 09:42:52,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3834, Invalid=4176, Unknown=0, NotChecked=0, Total=8010 [2018-10-23 09:42:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-23 09:42:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2018-10-23 09:42:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-23 09:42:52,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 266 transitions. [2018-10-23 09:42:52,520 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 266 transitions. Word has length 262 [2018-10-23 09:42:52,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:52,520 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 266 transitions. [2018-10-23 09:42:52,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-23 09:42:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 266 transitions. [2018-10-23 09:42:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2018-10-23 09:42:52,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:52,521 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 86, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:52,521 INFO L424 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:52,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:52,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1680806928, now seen corresponding path program 86 times [2018-10-23 09:42:52,522 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:52,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:52,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:52,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:42:52,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:55,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:55,367 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:55,374 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:42:55,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:42:55,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:55,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11137 backedges. 0 proven. 11137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:55,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:55,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-23 09:42:55,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-23 09:42:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-23 09:42:55,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2018-10-23 09:42:55,679 INFO L87 Difference]: Start difference. First operand 266 states and 266 transitions. Second operand 90 states. [2018-10-23 09:42:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:56,026 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2018-10-23 09:42:56,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-23 09:42:56,026 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 265 [2018-10-23 09:42:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:56,027 INFO L225 Difference]: With dead ends: 274 [2018-10-23 09:42:56,028 INFO L226 Difference]: Without dead ends: 270 [2018-10-23 09:42:56,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3922, Invalid=4268, Unknown=0, NotChecked=0, Total=8190 [2018-10-23 09:42:56,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-23 09:42:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2018-10-23 09:42:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-23 09:42:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-10-23 09:42:56,032 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 265 [2018-10-23 09:42:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:56,032 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-10-23 09:42:56,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-23 09:42:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-10-23 09:42:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-23 09:42:56,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:56,034 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 87, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:56,034 INFO L424 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:56,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:56,034 INFO L82 PathProgramCache]: Analyzing trace with hash -461100341, now seen corresponding path program 87 times [2018-10-23 09:42:56,034 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:56,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:56,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:56,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:56,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:42:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:59,215 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:42:59,215 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:42:59,221 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:42:59,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-23 09:42:59,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:42:59,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:42:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11397 backedges. 0 proven. 11397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:42:59,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:42:59,632 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-23 09:42:59,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-23 09:42:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-23 09:42:59,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2018-10-23 09:42:59,634 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 91 states. [2018-10-23 09:42:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:42:59,875 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-10-23 09:42:59,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-23 09:42:59,875 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 268 [2018-10-23 09:42:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:42:59,876 INFO L225 Difference]: With dead ends: 277 [2018-10-23 09:42:59,876 INFO L226 Difference]: Without dead ends: 273 [2018-10-23 09:42:59,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4011, Invalid=4361, Unknown=0, NotChecked=0, Total=8372 [2018-10-23 09:42:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-10-23 09:42:59,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2018-10-23 09:42:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2018-10-23 09:42:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2018-10-23 09:42:59,880 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 268 [2018-10-23 09:42:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:42:59,880 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2018-10-23 09:42:59,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-23 09:42:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2018-10-23 09:42:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2018-10-23 09:42:59,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:42:59,881 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 88, 1, 1, 1, 1, 1, 1] [2018-10-23 09:42:59,881 INFO L424 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:42:59,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:42:59,882 INFO L82 PathProgramCache]: Analyzing trace with hash 308565552, now seen corresponding path program 88 times [2018-10-23 09:42:59,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:42:59,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:42:59,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:59,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:42:59,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:42:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:03,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:03,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:03,114 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:03,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:03,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:03,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:03,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11660 backedges. 0 proven. 11660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:03,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:03,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-23 09:43:03,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-23 09:43:03,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-23 09:43:03,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2018-10-23 09:43:03,420 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 92 states. [2018-10-23 09:43:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:03,722 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2018-10-23 09:43:03,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-23 09:43:03,723 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 271 [2018-10-23 09:43:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:03,724 INFO L225 Difference]: With dead ends: 280 [2018-10-23 09:43:03,725 INFO L226 Difference]: Without dead ends: 276 [2018-10-23 09:43:03,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4101, Invalid=4455, Unknown=0, NotChecked=0, Total=8556 [2018-10-23 09:43:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2018-10-23 09:43:03,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2018-10-23 09:43:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-23 09:43:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-10-23 09:43:03,729 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 271 [2018-10-23 09:43:03,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:03,729 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-10-23 09:43:03,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-23 09:43:03,729 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-10-23 09:43:03,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-23 09:43:03,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:03,730 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 89, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:03,731 INFO L424 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:03,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1405209429, now seen corresponding path program 89 times [2018-10-23 09:43:03,731 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:03,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:03,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:03,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:03,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:06,742 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:06,742 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:06,749 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:07,004 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-23 09:43:07,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:07,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11926 backedges. 0 proven. 11926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:07,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:07,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-23 09:43:07,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-23 09:43:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-23 09:43:07,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2018-10-23 09:43:07,153 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 93 states. [2018-10-23 09:43:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:07,623 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-10-23 09:43:07,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-23 09:43:07,623 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 274 [2018-10-23 09:43:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:07,624 INFO L225 Difference]: With dead ends: 283 [2018-10-23 09:43:07,624 INFO L226 Difference]: Without dead ends: 279 [2018-10-23 09:43:07,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4192, Invalid=4550, Unknown=0, NotChecked=0, Total=8742 [2018-10-23 09:43:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-23 09:43:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2018-10-23 09:43:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-10-23 09:43:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-10-23 09:43:07,628 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 274 [2018-10-23 09:43:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:07,629 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-10-23 09:43:07,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-23 09:43:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-10-23 09:43:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-10-23 09:43:07,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:07,630 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 90, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:07,630 INFO L424 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:07,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:07,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2095546448, now seen corresponding path program 90 times [2018-10-23 09:43:07,630 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:07,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:07,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:07,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:07,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:10,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:10,808 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:10,815 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:43:11,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-23 09:43:11,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:11,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12195 backedges. 0 proven. 12195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:11,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:11,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-23 09:43:11,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-23 09:43:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-23 09:43:11,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2018-10-23 09:43:11,253 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 94 states. [2018-10-23 09:43:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:11,649 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2018-10-23 09:43:11,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-23 09:43:11,649 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 277 [2018-10-23 09:43:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:11,650 INFO L225 Difference]: With dead ends: 286 [2018-10-23 09:43:11,650 INFO L226 Difference]: Without dead ends: 282 [2018-10-23 09:43:11,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4284, Invalid=4646, Unknown=0, NotChecked=0, Total=8930 [2018-10-23 09:43:11,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-23 09:43:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-10-23 09:43:11,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-23 09:43:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-10-23 09:43:11,654 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 277 [2018-10-23 09:43:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:11,654 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-10-23 09:43:11,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-23 09:43:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-10-23 09:43:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-23 09:43:11,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:11,655 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 91, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:11,655 INFO L424 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:11,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:11,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1576970613, now seen corresponding path program 91 times [2018-10-23 09:43:11,656 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:11,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:11,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:11,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:11,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:15,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:15,865 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:15,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:16,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12467 backedges. 0 proven. 12467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:16,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:16,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-23 09:43:16,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-23 09:43:16,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-23 09:43:16,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2018-10-23 09:43:16,234 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 95 states. [2018-10-23 09:43:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:16,626 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-10-23 09:43:16,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-23 09:43:16,626 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 280 [2018-10-23 09:43:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:16,627 INFO L225 Difference]: With dead ends: 289 [2018-10-23 09:43:16,627 INFO L226 Difference]: Without dead ends: 285 [2018-10-23 09:43:16,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4377, Invalid=4743, Unknown=0, NotChecked=0, Total=9120 [2018-10-23 09:43:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-23 09:43:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2018-10-23 09:43:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2018-10-23 09:43:16,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 284 transitions. [2018-10-23 09:43:16,632 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 284 transitions. Word has length 280 [2018-10-23 09:43:16,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:16,632 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 284 transitions. [2018-10-23 09:43:16,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-23 09:43:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 284 transitions. [2018-10-23 09:43:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-23 09:43:16,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:16,633 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 92, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:16,633 INFO L424 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:16,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:16,634 INFO L82 PathProgramCache]: Analyzing trace with hash 464163440, now seen corresponding path program 92 times [2018-10-23 09:43:16,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:16,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:16,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:16,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:16,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:20,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:20,188 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:20,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:43:20,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:43:20,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:20,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12742 backedges. 0 proven. 12742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:20,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:20,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-23 09:43:20,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-23 09:43:20,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-23 09:43:20,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2018-10-23 09:43:20,507 INFO L87 Difference]: Start difference. First operand 284 states and 284 transitions. Second operand 96 states. [2018-10-23 09:43:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:20,794 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2018-10-23 09:43:20,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-23 09:43:20,795 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 283 [2018-10-23 09:43:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:20,796 INFO L225 Difference]: With dead ends: 292 [2018-10-23 09:43:20,796 INFO L226 Difference]: Without dead ends: 288 [2018-10-23 09:43:20,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4471, Invalid=4841, Unknown=0, NotChecked=0, Total=9312 [2018-10-23 09:43:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-10-23 09:43:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2018-10-23 09:43:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-10-23 09:43:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-10-23 09:43:20,801 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 283 [2018-10-23 09:43:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:20,801 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-10-23 09:43:20,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-23 09:43:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-10-23 09:43:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-10-23 09:43:20,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:20,803 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 93, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:20,803 INFO L424 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:20,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:20,803 INFO L82 PathProgramCache]: Analyzing trace with hash -258240405, now seen corresponding path program 93 times [2018-10-23 09:43:20,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:20,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:20,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:20,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:20,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:24,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:24,320 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:24,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:43:24,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-23 09:43:24,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:24,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13020 backedges. 0 proven. 13020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:24,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:24,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-23 09:43:24,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-23 09:43:24,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-23 09:43:24,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2018-10-23 09:43:24,766 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 97 states. [2018-10-23 09:43:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:25,104 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-10-23 09:43:25,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-23 09:43:25,104 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 286 [2018-10-23 09:43:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:25,105 INFO L225 Difference]: With dead ends: 295 [2018-10-23 09:43:25,105 INFO L226 Difference]: Without dead ends: 291 [2018-10-23 09:43:25,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 286 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4566, Invalid=4940, Unknown=0, NotChecked=0, Total=9506 [2018-10-23 09:43:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-23 09:43:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2018-10-23 09:43:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-10-23 09:43:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 290 transitions. [2018-10-23 09:43:25,110 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 290 transitions. Word has length 286 [2018-10-23 09:43:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:25,110 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 290 transitions. [2018-10-23 09:43:25,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-23 09:43:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 290 transitions. [2018-10-23 09:43:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2018-10-23 09:43:25,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:25,111 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 94, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:25,111 INFO L424 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:25,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash 689933456, now seen corresponding path program 94 times [2018-10-23 09:43:25,112 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:25,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:25,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:25,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:25,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:28,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:28,827 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:28,835 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:28,986 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:28,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:28,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13301 backedges. 0 proven. 13301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:29,142 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:29,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-23 09:43:29,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-23 09:43:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-23 09:43:29,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2018-10-23 09:43:29,144 INFO L87 Difference]: Start difference. First operand 290 states and 290 transitions. Second operand 98 states. [2018-10-23 09:43:29,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:29,490 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-10-23 09:43:29,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-23 09:43:29,490 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 289 [2018-10-23 09:43:29,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:29,492 INFO L225 Difference]: With dead ends: 298 [2018-10-23 09:43:29,492 INFO L226 Difference]: Without dead ends: 294 [2018-10-23 09:43:29,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4662, Invalid=5040, Unknown=0, NotChecked=0, Total=9702 [2018-10-23 09:43:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2018-10-23 09:43:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2018-10-23 09:43:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-23 09:43:29,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-10-23 09:43:29,497 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 289 [2018-10-23 09:43:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:29,497 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-10-23 09:43:29,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-23 09:43:29,498 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-10-23 09:43:29,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-23 09:43:29,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:29,499 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 95, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:29,499 INFO L424 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:29,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:29,499 INFO L82 PathProgramCache]: Analyzing trace with hash -262479285, now seen corresponding path program 95 times [2018-10-23 09:43:29,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:29,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:29,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:29,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:29,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:32,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:32,940 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:32,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:43:33,277 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-23 09:43:33,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:33,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13585 backedges. 0 proven. 13585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:33,477 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:33,477 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-23 09:43:33,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-23 09:43:33,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-23 09:43:33,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2018-10-23 09:43:33,478 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 99 states. [2018-10-23 09:43:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:33,935 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-10-23 09:43:33,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-23 09:43:33,935 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 292 [2018-10-23 09:43:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:33,937 INFO L225 Difference]: With dead ends: 301 [2018-10-23 09:43:33,937 INFO L226 Difference]: Without dead ends: 297 [2018-10-23 09:43:33,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4759, Invalid=5141, Unknown=0, NotChecked=0, Total=9900 [2018-10-23 09:43:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-10-23 09:43:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2018-10-23 09:43:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2018-10-23 09:43:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 296 transitions. [2018-10-23 09:43:33,941 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 296 transitions. Word has length 292 [2018-10-23 09:43:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:33,941 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 296 transitions. [2018-10-23 09:43:33,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-23 09:43:33,941 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 296 transitions. [2018-10-23 09:43:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2018-10-23 09:43:33,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:33,942 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 96, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:33,943 INFO L424 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:33,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1036489040, now seen corresponding path program 96 times [2018-10-23 09:43:33,943 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:33,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:33,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:33,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:33,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:37,466 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:37,466 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:37,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:43:37,753 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-23 09:43:37,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:37,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 13872 backedges. 0 proven. 13872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:37,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:37,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-23 09:43:37,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-23 09:43:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-23 09:43:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2018-10-23 09:43:37,909 INFO L87 Difference]: Start difference. First operand 296 states and 296 transitions. Second operand 100 states. [2018-10-23 09:43:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:38,241 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2018-10-23 09:43:38,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-23 09:43:38,241 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 295 [2018-10-23 09:43:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:38,243 INFO L225 Difference]: With dead ends: 304 [2018-10-23 09:43:38,243 INFO L226 Difference]: Without dead ends: 300 [2018-10-23 09:43:38,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4857, Invalid=5243, Unknown=0, NotChecked=0, Total=10100 [2018-10-23 09:43:38,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2018-10-23 09:43:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2018-10-23 09:43:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-23 09:43:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-10-23 09:43:38,247 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 295 [2018-10-23 09:43:38,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:38,247 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-10-23 09:43:38,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-23 09:43:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-10-23 09:43:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-23 09:43:38,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:38,249 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 97, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:38,249 INFO L424 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:38,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:38,249 INFO L82 PathProgramCache]: Analyzing trace with hash 118311979, now seen corresponding path program 97 times [2018-10-23 09:43:38,249 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:38,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:38,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:38,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:38,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:42,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:42,019 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:42,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:42,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:42,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14162 backedges. 0 proven. 14162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:42,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:42,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-23 09:43:42,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-23 09:43:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-23 09:43:42,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2018-10-23 09:43:42,346 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 101 states. [2018-10-23 09:43:42,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:42,658 INFO L93 Difference]: Finished difference Result 307 states and 307 transitions. [2018-10-23 09:43:42,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-23 09:43:42,658 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 298 [2018-10-23 09:43:42,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:42,660 INFO L225 Difference]: With dead ends: 307 [2018-10-23 09:43:42,660 INFO L226 Difference]: Without dead ends: 303 [2018-10-23 09:43:42,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4956, Invalid=5346, Unknown=0, NotChecked=0, Total=10302 [2018-10-23 09:43:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-23 09:43:42,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2018-10-23 09:43:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2018-10-23 09:43:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2018-10-23 09:43:42,663 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 298 [2018-10-23 09:43:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:42,664 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2018-10-23 09:43:42,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-23 09:43:42,664 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2018-10-23 09:43:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2018-10-23 09:43:42,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:42,665 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 98, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:42,665 INFO L424 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:42,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:42,665 INFO L82 PathProgramCache]: Analyzing trace with hash 107428048, now seen corresponding path program 98 times [2018-10-23 09:43:42,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:42,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:42,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:42,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:43:42,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:46,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:46,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:46,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 09:43:46,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 09:43:46,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:46,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14455 backedges. 0 proven. 14455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:46,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:46,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-23 09:43:46,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-23 09:43:46,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-23 09:43:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2018-10-23 09:43:46,988 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 102 states. [2018-10-23 09:43:47,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:47,361 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2018-10-23 09:43:47,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-23 09:43:47,361 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 301 [2018-10-23 09:43:47,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:47,363 INFO L225 Difference]: With dead ends: 310 [2018-10-23 09:43:47,363 INFO L226 Difference]: Without dead ends: 306 [2018-10-23 09:43:47,363 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 301 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5056, Invalid=5450, Unknown=0, NotChecked=0, Total=10506 [2018-10-23 09:43:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-23 09:43:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-10-23 09:43:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-23 09:43:47,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2018-10-23 09:43:47,366 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 301 [2018-10-23 09:43:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:47,367 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2018-10-23 09:43:47,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-23 09:43:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2018-10-23 09:43:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-23 09:43:47,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:47,368 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 99, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:47,368 INFO L424 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:47,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2013213173, now seen corresponding path program 99 times [2018-10-23 09:43:47,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:47,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:47,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:47,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:47,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:51,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:51,598 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:51,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 09:43:51,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-23 09:43:51,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:51,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 14751 backedges. 0 proven. 14751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:52,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:52,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-23 09:43:52,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-23 09:43:52,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-23 09:43:52,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2018-10-23 09:43:52,088 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand 103 states. [2018-10-23 09:43:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:52,579 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-10-23 09:43:52,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-23 09:43:52,579 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 304 [2018-10-23 09:43:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:52,580 INFO L225 Difference]: With dead ends: 313 [2018-10-23 09:43:52,581 INFO L226 Difference]: Without dead ends: 309 [2018-10-23 09:43:52,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 304 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5157, Invalid=5555, Unknown=0, NotChecked=0, Total=10712 [2018-10-23 09:43:52,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-23 09:43:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2018-10-23 09:43:52,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-10-23 09:43:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-10-23 09:43:52,586 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 304 [2018-10-23 09:43:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:52,587 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-10-23 09:43:52,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-23 09:43:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-10-23 09:43:52,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-10-23 09:43:52,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:52,588 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 100, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:52,589 INFO L424 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:52,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash 933096176, now seen corresponding path program 100 times [2018-10-23 09:43:52,589 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:52,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:52,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:52,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:52,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:43:56,966 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:56,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:43:56,967 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:43:56,974 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 09:43:57,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 09:43:57,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:43:57,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:43:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 15050 backedges. 0 proven. 15050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:43:57,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:43:57,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-23 09:43:57,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-23 09:43:57,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-23 09:43:57,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2018-10-23 09:43:57,306 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 104 states. [2018-10-23 09:43:57,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:43:57,705 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2018-10-23 09:43:57,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-23 09:43:57,706 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 307 [2018-10-23 09:43:57,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:43:57,707 INFO L225 Difference]: With dead ends: 316 [2018-10-23 09:43:57,708 INFO L226 Difference]: Without dead ends: 312 [2018-10-23 09:43:57,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 307 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5259, Invalid=5661, Unknown=0, NotChecked=0, Total=10920 [2018-10-23 09:43:57,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2018-10-23 09:43:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2018-10-23 09:43:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2018-10-23 09:43:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2018-10-23 09:43:57,712 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 307 [2018-10-23 09:43:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:43:57,713 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2018-10-23 09:43:57,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-23 09:43:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2018-10-23 09:43:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2018-10-23 09:43:57,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:43:57,714 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 101, 1, 1, 1, 1, 1, 1] [2018-10-23 09:43:57,714 INFO L424 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:43:57,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:43:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1811716117, now seen corresponding path program 101 times [2018-10-23 09:43:57,715 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:43:57,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:43:57,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:57,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:43:57,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:43:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:01,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:01,882 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:44:01,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 09:44:02,192 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-23 09:44:02,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:02,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:02,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15352 backedges. 0 proven. 15352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:02,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:02,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-23 09:44:02,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-23 09:44:02,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-23 09:44:02,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2018-10-23 09:44:02,513 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand 105 states. [2018-10-23 09:44:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:02,968 INFO L93 Difference]: Finished difference Result 319 states and 319 transitions. [2018-10-23 09:44:02,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-23 09:44:02,968 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 310 [2018-10-23 09:44:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:02,969 INFO L225 Difference]: With dead ends: 319 [2018-10-23 09:44:02,969 INFO L226 Difference]: Without dead ends: 315 [2018-10-23 09:44:02,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5362, Invalid=5768, Unknown=0, NotChecked=0, Total=11130 [2018-10-23 09:44:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-23 09:44:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2018-10-23 09:44:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-10-23 09:44:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 314 transitions. [2018-10-23 09:44:02,974 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 314 transitions. Word has length 310 [2018-10-23 09:44:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:02,974 INFO L481 AbstractCegarLoop]: Abstraction has 314 states and 314 transitions. [2018-10-23 09:44:02,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-23 09:44:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 314 transitions. [2018-10-23 09:44:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2018-10-23 09:44:02,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:02,976 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 102, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:02,976 INFO L424 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:02,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash -632388336, now seen corresponding path program 102 times [2018-10-23 09:44:02,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:02,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:02,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:02,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:02,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:07,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:07,131 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:44:07,138 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-23 09:44:07,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-23 09:44:07,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 09:44:07,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15657 backedges. 0 proven. 15657 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:07,641 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:07,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-23 09:44:07,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-23 09:44:07,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-23 09:44:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2018-10-23 09:44:07,643 INFO L87 Difference]: Start difference. First operand 314 states and 314 transitions. Second operand 106 states. [2018-10-23 09:44:08,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:08,031 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2018-10-23 09:44:08,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-23 09:44:08,031 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 313 [2018-10-23 09:44:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:08,032 INFO L225 Difference]: With dead ends: 322 [2018-10-23 09:44:08,032 INFO L226 Difference]: Without dead ends: 318 [2018-10-23 09:44:08,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5466, Invalid=5876, Unknown=0, NotChecked=0, Total=11342 [2018-10-23 09:44:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-10-23 09:44:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2018-10-23 09:44:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-23 09:44:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2018-10-23 09:44:08,037 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 313 [2018-10-23 09:44:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:08,038 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2018-10-23 09:44:08,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-23 09:44:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2018-10-23 09:44:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-23 09:44:08,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:08,039 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 103, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:08,039 INFO L424 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:08,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash -110945845, now seen corresponding path program 103 times [2018-10-23 09:44:08,040 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:08,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:08,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:08,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 09:44:08,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:12,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 09:44:12,298 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 09:44:12,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 09:44:12,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 09:44:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 15965 backedges. 0 proven. 15965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 09:44:12,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 09:44:12,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-23 09:44:12,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-23 09:44:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-23 09:44:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2018-10-23 09:44:12,646 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand 107 states. [2018-10-23 09:44:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 09:44:13,134 INFO L93 Difference]: Finished difference Result 325 states and 325 transitions. [2018-10-23 09:44:13,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-23 09:44:13,134 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 316 [2018-10-23 09:44:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 09:44:13,136 INFO L225 Difference]: With dead ends: 325 [2018-10-23 09:44:13,136 INFO L226 Difference]: Without dead ends: 321 [2018-10-23 09:44:13,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 316 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5571, Invalid=5985, Unknown=0, NotChecked=0, Total=11556 [2018-10-23 09:44:13,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2018-10-23 09:44:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2018-10-23 09:44:13,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-23 09:44:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 320 transitions. [2018-10-23 09:44:13,141 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 320 transitions. Word has length 316 [2018-10-23 09:44:13,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 09:44:13,141 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 320 transitions. [2018-10-23 09:44:13,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-23 09:44:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 320 transitions. [2018-10-23 09:44:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-23 09:44:13,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 09:44:13,143 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 104, 1, 1, 1, 1, 1, 1] [2018-10-23 09:44:13,143 INFO L424 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 09:44:13,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 09:44:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash -714406096, now seen corresponding path program 104 times [2018-10-23 09:44:13,144 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 09:44:13,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 09:44:13,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:13,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 09:44:13,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 09:44:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-23 09:44:14,348 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 09:44:14,353 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 09:44:14,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:44:14 BoogieIcfgContainer [2018-10-23 09:44:14,353 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 09:44:14,354 INFO L168 Benchmark]: Toolchain (without parser) took 231673.48 ms. Allocated memory was 1.5 GB in the beginning and 2.9 GB in the end (delta: 1.4 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -406.4 MB). Peak memory consumption was 946.3 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:14,356 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-23 09:44:14,356 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.93 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. [2018-10-23 09:44:14,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.26 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. [2018-10-23 09:44:14,356 INFO L168 Benchmark]: Boogie Preprocessor took 23.32 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. [2018-10-23 09:44:14,357 INFO L168 Benchmark]: RCFGBuilder took 504.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -846.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:14,357 INFO L168 Benchmark]: TraceAbstraction took 230838.17 ms. Allocated memory was 2.3 GB in the beginning and 2.9 GB in the end (delta: 565.2 MB). Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 429.9 MB). Peak memory consumption was 995.1 MB. Max. memory is 7.1 GB. [2018-10-23 09:44:14,359 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 257.93 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 44.26 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 23.32 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 504.95 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -846.8 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 230838.17 ms. Allocated memory was 2.3 GB in the beginning and 2.9 GB in the end (delta: 565.2 MB). Free memory was 2.3 GB in the beginning and 1.8 GB in the end (delta: 429.9 MB). Peak memory consumption was 995.1 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 BasicCegarLoop was analyzing trace of length 320 with TraceHistMax 105,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 49 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 230.7s OverallTime, 106 OverallIterations, 105 TraceHistogramMax, 22.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 742 SDtfs, 5562 SDslu, 23554 SDs, 0 SdLazy, 8998 SolverSat, 181 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22560 GetRequests, 16794 SyntacticMatches, 102 SemanticMatches, 5664 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10710 ImplicationChecksByTransitivity, 178.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=320occurred in iteration=105, 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: 0.4s AutomataMinimizationTime, 105 MinimizatonAttempts, 103 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.7s SsaConstructionTime, 14.8s SatisfiabilityAnalysisTime, 183.6s InterpolantComputationTime, 33591 NumberOfCodeBlocks, 33591 NumberOfCodeBlocksAsserted, 2928 NumberOfCheckSat, 33383 ConstructedInterpolants, 0 QuantifiedInterpolants, 21002125 SizeOfPredicates, 308 NumberOfNonLiveVariables, 65920 ConjunctsInSsa, 6073 ConjunctsInUnsatCore, 208 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1114048 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown