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/eca-rers2012/Problem13_label22_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:18:10,600 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:18:10,602 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:18:10,618 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:18:10,619 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:18:10,623 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:18:10,624 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:18:10,626 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:18:10,628 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:18:10,629 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:18:10,630 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:18:10,630 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:18:10,631 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:18:10,632 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:18:10,633 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:18:10,634 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:18:10,634 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:18:10,636 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:18:10,638 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:18:10,640 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:18:10,641 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:18:10,642 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:18:10,645 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 20:18:10,645 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 20:18:10,646 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 20:18:10,647 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 20:18:10,648 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 20:18:10,648 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 20:18:10,649 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 20:18:10,650 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 20:18:10,653 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 20:18:10,654 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 20:18:10,654 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 20:18:10,654 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 20:18:10,655 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 20:18:10,656 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 20:18:10,656 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 20:18:10,684 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:18:10,684 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:18:10,685 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:18:10,686 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:18:10,687 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:18:10,687 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:18:10,688 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:18:10,689 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:18:10,689 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:18:10,689 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:18:10,689 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:18:10,690 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:18:10,690 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:18:10,690 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:18:10,690 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:18:10,691 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:18:10,691 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:18:10,692 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:18:10,692 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:18:10,692 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:18:10,692 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:18:10,692 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:18:10,692 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:18:10,693 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:18:10,693 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:18:10,693 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:18:10,693 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:18:10,693 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:18:10,757 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:18:10,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:18:10,777 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:18:10,779 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:18:10,779 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:18:10,780 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label22_true-unreach-call.c [2018-10-23 20:18:10,847 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9f335dfa3/2009fd45834e45a0b472c53a14d071bc/FLAG6a56dc4d3 [2018-10-23 20:18:11,654 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:18:11,655 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label22_true-unreach-call.c [2018-10-23 20:18:11,693 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9f335dfa3/2009fd45834e45a0b472c53a14d071bc/FLAG6a56dc4d3 [2018-10-23 20:18:11,710 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/9f335dfa3/2009fd45834e45a0b472c53a14d071bc [2018-10-23 20:18:11,722 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:18:11,724 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:18:11,725 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:18:11,725 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:18:11,730 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:18:11,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:18:11" (1/1) ... [2018-10-23 20:18:11,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7897d110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:11, skipping insertion in model container [2018-10-23 20:18:11,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:18:11" (1/1) ... [2018-10-23 20:18:11,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:18:11,927 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:18:13,459 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:18:13,464 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:18:14,205 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:18:14,241 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:18:14,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14 WrapperNode [2018-10-23 20:18:14,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:18:14,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:18:14,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:18:14,244 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:18:14,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:14,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:18:15,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:18:15,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:18:15,067 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:18:15,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (1/1) ... [2018-10-23 20:18:15,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:18:15,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:18:15,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:18:15,592 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:18:15,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (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 20:18:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:18:15,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:18:15,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:18:28,742 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:18:28,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:18:28 BoogieIcfgContainer [2018-10-23 20:18:28,743 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:18:28,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:18:28,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:18:28,747 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:18:28,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:18:11" (1/3) ... [2018-10-23 20:18:28,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aff2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:18:28, skipping insertion in model container [2018-10-23 20:18:28,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:18:14" (2/3) ... [2018-10-23 20:18:28,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aff2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:18:28, skipping insertion in model container [2018-10-23 20:18:28,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:18:28" (3/3) ... [2018-10-23 20:18:28,751 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label22_true-unreach-call.c [2018-10-23 20:18:28,762 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:18:28,778 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:18:28,796 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:18:28,841 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:18:28,842 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:18:28,842 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:18:28,842 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:18:28,842 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:18:28,843 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:18:28,843 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:18:28,843 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:18:28,843 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:18:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states. [2018-10-23 20:18:28,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 20:18:28,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:18:28,896 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:18:28,899 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:18:28,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:18:28,905 INFO L82 PathProgramCache]: Analyzing trace with hash 575043410, now seen corresponding path program 1 times [2018-10-23 20:18:28,907 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:18:28,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:18:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:18:28,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:18:28,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:18:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:18:29,263 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 20:18:29,267 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:18:29,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:18:29,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:18:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:18:29,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:18:29,286 INFO L87 Difference]: Start difference. First operand 1099 states. Second operand 4 states. [2018-10-23 20:18:42,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:18:42,856 INFO L93 Difference]: Finished difference Result 3896 states and 7286 transitions. [2018-10-23 20:18:42,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:18:42,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-23 20:18:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:18:42,901 INFO L225 Difference]: With dead ends: 3896 [2018-10-23 20:18:42,902 INFO L226 Difference]: Without dead ends: 2790 [2018-10-23 20:18:42,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:18:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2018-10-23 20:18:43,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 1945. [2018-10-23 20:18:43,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1945 states. [2018-10-23 20:18:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 3412 transitions. [2018-10-23 20:18:43,066 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 3412 transitions. Word has length 33 [2018-10-23 20:18:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:18:43,067 INFO L481 AbstractCegarLoop]: Abstraction has 1945 states and 3412 transitions. [2018-10-23 20:18:43,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:18:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 3412 transitions. [2018-10-23 20:18:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-23 20:18:43,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:18:43,071 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:18:43,072 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:18:43,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:18:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash 405769897, now seen corresponding path program 1 times [2018-10-23 20:18:43,072 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:18:43,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:18:43,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:18:43,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:18:43,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:18:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:18:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:18:43,886 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:18:43,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:18:43,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:18:43,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:18:43,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:18:43,889 INFO L87 Difference]: Start difference. First operand 1945 states and 3412 transitions. Second operand 5 states. [2018-10-23 20:18:44,153 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-10-23 20:18:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:18:59,141 INFO L93 Difference]: Finished difference Result 7061 states and 12475 transitions. [2018-10-23 20:18:59,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:18:59,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2018-10-23 20:18:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:18:59,168 INFO L225 Difference]: With dead ends: 7061 [2018-10-23 20:18:59,168 INFO L226 Difference]: Without dead ends: 5118 [2018-10-23 20:18:59,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:18:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5118 states. [2018-10-23 20:18:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5118 to 5117. [2018-10-23 20:18:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5117 states. [2018-10-23 20:18:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 7612 transitions. [2018-10-23 20:18:59,275 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 7612 transitions. Word has length 99 [2018-10-23 20:18:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:18:59,276 INFO L481 AbstractCegarLoop]: Abstraction has 5117 states and 7612 transitions. [2018-10-23 20:18:59,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:18:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 7612 transitions. [2018-10-23 20:18:59,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-23 20:18:59,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:18:59,282 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:18:59,282 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:18:59,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:18:59,282 INFO L82 PathProgramCache]: Analyzing trace with hash 697216454, now seen corresponding path program 1 times [2018-10-23 20:18:59,283 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:18:59,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:18:59,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:18:59,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:18:59,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:18:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:18:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:18:59,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:18:59,683 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 20:18:59,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:18:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:18:59,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:18:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:18:59,902 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:18:59,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-23 20:18:59,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:18:59,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:18:59,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:18:59,905 INFO L87 Difference]: Start difference. First operand 5117 states and 7612 transitions. Second operand 6 states. [2018-10-23 20:19:26,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:19:26,526 INFO L93 Difference]: Finished difference Result 21526 states and 33845 transitions. [2018-10-23 20:19:26,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:19:26,527 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2018-10-23 20:19:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:19:26,600 INFO L225 Difference]: With dead ends: 21526 [2018-10-23 20:19:26,601 INFO L226 Difference]: Without dead ends: 17199 [2018-10-23 20:19:26,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:19:26,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17199 states. [2018-10-23 20:19:26,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17199 to 17008. [2018-10-23 20:19:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17008 states. [2018-10-23 20:19:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 21511 transitions. [2018-10-23 20:19:26,914 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 21511 transitions. Word has length 159 [2018-10-23 20:19:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:19:26,915 INFO L481 AbstractCegarLoop]: Abstraction has 17008 states and 21511 transitions. [2018-10-23 20:19:26,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:19:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 21511 transitions. [2018-10-23 20:19:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-23 20:19:26,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:19:26,921 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:19:26,921 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:19:26,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:19:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash -507178207, now seen corresponding path program 1 times [2018-10-23 20:19:26,922 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:19:26,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:19:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:19:26,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:19:26,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:19:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:19:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:19:27,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:19:27,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:19:27,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:19:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:19:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:19:27,340 INFO L87 Difference]: Start difference. First operand 17008 states and 21511 transitions. Second operand 5 states. [2018-10-23 20:19:44,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:19:44,135 INFO L93 Difference]: Finished difference Result 47698 states and 62253 transitions. [2018-10-23 20:19:44,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:19:44,136 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2018-10-23 20:19:44,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:19:44,209 INFO L225 Difference]: With dead ends: 47698 [2018-10-23 20:19:44,209 INFO L226 Difference]: Without dead ends: 31480 [2018-10-23 20:19:44,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:19:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31480 states. [2018-10-23 20:19:44,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31480 to 31316. [2018-10-23 20:19:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31316 states. [2018-10-23 20:19:44,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31316 states to 31316 states and 39611 transitions. [2018-10-23 20:19:44,665 INFO L78 Accepts]: Start accepts. Automaton has 31316 states and 39611 transitions. Word has length 206 [2018-10-23 20:19:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:19:44,667 INFO L481 AbstractCegarLoop]: Abstraction has 31316 states and 39611 transitions. [2018-10-23 20:19:44,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:19:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 31316 states and 39611 transitions. [2018-10-23 20:19:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-23 20:19:44,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:19:44,674 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:19:44,674 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:19:44,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:19:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1811477803, now seen corresponding path program 1 times [2018-10-23 20:19:44,675 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:19:44,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:19:44,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:19:44,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:19:44,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:19:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:19:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 61 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-23 20:19:45,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:19:45,023 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 20:19:45,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:19:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:19:45,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:19:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:19:45,206 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:19:45,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-23 20:19:45,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:19:45,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:19:45,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:19:45,210 INFO L87 Difference]: Start difference. First operand 31316 states and 39611 transitions. Second operand 4 states. [2018-10-23 20:19:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:19:59,951 INFO L93 Difference]: Finished difference Result 106831 states and 135959 transitions. [2018-10-23 20:19:59,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:19:59,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2018-10-23 20:19:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:00,109 INFO L225 Difference]: With dead ends: 106831 [2018-10-23 20:20:00,109 INFO L226 Difference]: Without dead ends: 76305 [2018-10-23 20:20:00,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76305 states. [2018-10-23 20:20:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76305 to 54950. [2018-10-23 20:20:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54950 states. [2018-10-23 20:20:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54950 states to 54950 states and 66506 transitions. [2018-10-23 20:20:01,228 INFO L78 Accepts]: Start accepts. Automaton has 54950 states and 66506 transitions. Word has length 210 [2018-10-23 20:20:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:20:01,229 INFO L481 AbstractCegarLoop]: Abstraction has 54950 states and 66506 transitions. [2018-10-23 20:20:01,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:20:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 54950 states and 66506 transitions. [2018-10-23 20:20:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2018-10-23 20:20:01,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:01,237 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:20:01,237 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:01,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:01,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1526348927, now seen corresponding path program 1 times [2018-10-23 20:20:01,238 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:01,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:01,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:01,239 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:01,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-23 20:20:01,711 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:20:01,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:20:01,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:20:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:20:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:01,712 INFO L87 Difference]: Start difference. First operand 54950 states and 66506 transitions. Second operand 4 states. [2018-10-23 20:20:14,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:20:14,686 INFO L93 Difference]: Finished difference Result 172142 states and 210044 transitions. [2018-10-23 20:20:14,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:20:14,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 283 [2018-10-23 20:20:14,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:14,898 INFO L225 Difference]: With dead ends: 172142 [2018-10-23 20:20:14,898 INFO L226 Difference]: Without dead ends: 117982 [2018-10-23 20:20:14,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:15,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117982 states. [2018-10-23 20:20:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117982 to 114036. [2018-10-23 20:20:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114036 states. [2018-10-23 20:20:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114036 states to 114036 states and 131329 transitions. [2018-10-23 20:20:16,262 INFO L78 Accepts]: Start accepts. Automaton has 114036 states and 131329 transitions. Word has length 283 [2018-10-23 20:20:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:20:16,263 INFO L481 AbstractCegarLoop]: Abstraction has 114036 states and 131329 transitions. [2018-10-23 20:20:16,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:20:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 114036 states and 131329 transitions. [2018-10-23 20:20:16,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-23 20:20:16,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:16,274 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:20:16,274 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:16,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash -201881846, now seen corresponding path program 1 times [2018-10-23 20:20:16,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:16,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:16,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:16,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:16,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:20:17,195 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:20:17,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:20:17,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:20:17,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:20:17,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:17,197 INFO L87 Difference]: Start difference. First operand 114036 states and 131329 transitions. Second operand 4 states. [2018-10-23 20:20:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:20:30,522 INFO L93 Difference]: Finished difference Result 347099 states and 398033 transitions. [2018-10-23 20:20:30,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:20:30,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2018-10-23 20:20:30,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:30,837 INFO L225 Difference]: With dead ends: 347099 [2018-10-23 20:20:30,838 INFO L226 Difference]: Without dead ends: 222008 [2018-10-23 20:20:30,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222008 states. [2018-10-23 20:20:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222008 to 214081. [2018-10-23 20:20:33,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214081 states. [2018-10-23 20:20:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214081 states to 214081 states and 237637 transitions. [2018-10-23 20:20:33,465 INFO L78 Accepts]: Start accepts. Automaton has 214081 states and 237637 transitions. Word has length 338 [2018-10-23 20:20:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:20:33,466 INFO L481 AbstractCegarLoop]: Abstraction has 214081 states and 237637 transitions. [2018-10-23 20:20:33,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:20:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 214081 states and 237637 transitions. [2018-10-23 20:20:33,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2018-10-23 20:20:33,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:33,479 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:20:33,479 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:33,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:33,479 INFO L82 PathProgramCache]: Analyzing trace with hash -844714630, now seen corresponding path program 1 times [2018-10-23 20:20:33,479 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:33,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:33,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:33,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:33,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:33,893 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-23 20:20:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:20:34,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:20:34,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:20:34,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:20:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:20:34,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:34,010 INFO L87 Difference]: Start difference. First operand 214081 states and 237637 transitions. Second operand 4 states. [2018-10-23 20:20:43,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:20:43,969 INFO L93 Difference]: Finished difference Result 443921 states and 491995 transitions. [2018-10-23 20:20:43,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:20:43,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 384 [2018-10-23 20:20:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:44,221 INFO L225 Difference]: With dead ends: 443921 [2018-10-23 20:20:44,221 INFO L226 Difference]: Without dead ends: 202963 [2018-10-23 20:20:44,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202963 states. [2018-10-23 20:20:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202963 to 187985. [2018-10-23 20:20:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187985 states. [2018-10-23 20:20:47,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187985 states to 187985 states and 207463 transitions. [2018-10-23 20:20:47,569 INFO L78 Accepts]: Start accepts. Automaton has 187985 states and 207463 transitions. Word has length 384 [2018-10-23 20:20:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:20:47,569 INFO L481 AbstractCegarLoop]: Abstraction has 187985 states and 207463 transitions. [2018-10-23 20:20:47,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:20:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 187985 states and 207463 transitions. [2018-10-23 20:20:47,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2018-10-23 20:20:47,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:20:47,577 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:20:47,578 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:20:47,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:20:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1910407997, now seen corresponding path program 1 times [2018-10-23 20:20:47,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:20:47,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:20:47,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:47,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:20:47,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:20:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:20:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 541 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2018-10-23 20:20:47,961 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:20:47,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:20:47,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:20:47,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:20:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:47,963 INFO L87 Difference]: Start difference. First operand 187985 states and 207463 transitions. Second operand 4 states. [2018-10-23 20:20:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:20:57,503 INFO L93 Difference]: Finished difference Result 375217 states and 413989 transitions. [2018-10-23 20:20:57,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:20:57,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 410 [2018-10-23 20:20:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:20:57,705 INFO L225 Difference]: With dead ends: 375217 [2018-10-23 20:20:57,705 INFO L226 Difference]: Without dead ends: 186441 [2018-10-23 20:20:57,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:20:57,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186441 states. [2018-10-23 20:21:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186441 to 183244. [2018-10-23 20:21:00,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183244 states. [2018-10-23 20:21:01,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183244 states to 183244 states and 195824 transitions. [2018-10-23 20:21:01,089 INFO L78 Accepts]: Start accepts. Automaton has 183244 states and 195824 transitions. Word has length 410 [2018-10-23 20:21:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:01,090 INFO L481 AbstractCegarLoop]: Abstraction has 183244 states and 195824 transitions. [2018-10-23 20:21:01,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:21:01,090 INFO L276 IsEmpty]: Start isEmpty. Operand 183244 states and 195824 transitions. [2018-10-23 20:21:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2018-10-23 20:21:01,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:01,096 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:21:01,096 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:01,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash 74242425, now seen corresponding path program 1 times [2018-10-23 20:21:01,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:01,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:01,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:01,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:01,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-23 20:21:03,204 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:21:03,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:21:03,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:21:03,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:21:03,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:03,206 INFO L87 Difference]: Start difference. First operand 183244 states and 195824 transitions. Second operand 4 states. [2018-10-23 20:21:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:12,357 INFO L93 Difference]: Finished difference Result 359354 states and 384310 transitions. [2018-10-23 20:21:12,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:12,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 440 [2018-10-23 20:21:12,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:12,550 INFO L225 Difference]: With dead ends: 359354 [2018-10-23 20:21:12,550 INFO L226 Difference]: Without dead ends: 176900 [2018-10-23 20:21:12,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176900 states. [2018-10-23 20:21:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176900 to 167442. [2018-10-23 20:21:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167442 states. [2018-10-23 20:21:20,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167442 states to 167442 states and 175277 transitions. [2018-10-23 20:21:20,109 INFO L78 Accepts]: Start accepts. Automaton has 167442 states and 175277 transitions. Word has length 440 [2018-10-23 20:21:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:20,110 INFO L481 AbstractCegarLoop]: Abstraction has 167442 states and 175277 transitions. [2018-10-23 20:21:20,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:21:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 167442 states and 175277 transitions. [2018-10-23 20:21:20,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-10-23 20:21:20,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:20,130 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:21:20,131 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:20,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -296508079, now seen corresponding path program 1 times [2018-10-23 20:21:20,131 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:20,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:20,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:20,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:20,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1415 backedges. 1002 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2018-10-23 20:21:20,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:21:20,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:21:20,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:21:20,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:21:20,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:20,816 INFO L87 Difference]: Start difference. First operand 167442 states and 175277 transitions. Second operand 4 states. [2018-10-23 20:21:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:32,405 INFO L93 Difference]: Finished difference Result 415270 states and 436310 transitions. [2018-10-23 20:21:32,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:32,406 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 627 [2018-10-23 20:21:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:32,704 INFO L225 Difference]: With dead ends: 415270 [2018-10-23 20:21:32,704 INFO L226 Difference]: Without dead ends: 248618 [2018-10-23 20:21:32,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:32,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248618 states. [2018-10-23 20:21:35,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248618 to 239924. [2018-10-23 20:21:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239924 states. [2018-10-23 20:21:36,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239924 states to 239924 states and 250043 transitions. [2018-10-23 20:21:36,180 INFO L78 Accepts]: Start accepts. Automaton has 239924 states and 250043 transitions. Word has length 627 [2018-10-23 20:21:36,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:36,181 INFO L481 AbstractCegarLoop]: Abstraction has 239924 states and 250043 transitions. [2018-10-23 20:21:36,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:21:36,181 INFO L276 IsEmpty]: Start isEmpty. Operand 239924 states and 250043 transitions. [2018-10-23 20:21:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2018-10-23 20:21:36,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:36,208 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:21:36,209 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:36,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash 401947253, now seen corresponding path program 1 times [2018-10-23 20:21:36,209 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:36,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:36,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:36,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:36,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1159 backedges. 568 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2018-10-23 20:21:37,379 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:21:37,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:21:37,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:21:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:21:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:37,380 INFO L87 Difference]: Start difference. First operand 239924 states and 250043 transitions. Second operand 4 states. [2018-10-23 20:21:46,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:21:46,623 INFO L93 Difference]: Finished difference Result 480645 states and 500904 transitions. [2018-10-23 20:21:46,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:46,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 731 [2018-10-23 20:21:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:21:46,947 INFO L225 Difference]: With dead ends: 480645 [2018-10-23 20:21:46,948 INFO L226 Difference]: Without dead ends: 241511 [2018-10-23 20:21:47,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:21:47,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241511 states. [2018-10-23 20:21:49,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241511 to 233615. [2018-10-23 20:21:49,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233615 states. [2018-10-23 20:21:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233615 states to 233615 states and 241373 transitions. [2018-10-23 20:21:50,249 INFO L78 Accepts]: Start accepts. Automaton has 233615 states and 241373 transitions. Word has length 731 [2018-10-23 20:21:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:21:50,250 INFO L481 AbstractCegarLoop]: Abstraction has 233615 states and 241373 transitions. [2018-10-23 20:21:50,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:21:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 233615 states and 241373 transitions. [2018-10-23 20:21:50,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2018-10-23 20:21:50,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:21:50,297 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:21:50,298 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:21:50,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:21:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash 975721597, now seen corresponding path program 1 times [2018-10-23 20:21:50,298 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:21:50,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:21:50,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:50,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:21:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 154 proven. 632 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2018-10-23 20:21:52,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:21:52,375 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 20:21:52,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:21:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:21:52,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:21:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1061 backedges. 673 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2018-10-23 20:21:54,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 20:21:54,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-23 20:21:54,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 20:21:54,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 20:21:54,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:21:54,166 INFO L87 Difference]: Start difference. First operand 233615 states and 241373 transitions. Second operand 10 states. Received shutdown request... [2018-10-23 20:21:56,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:21:56,310 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:21:56,316 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:21:56,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:21:56 BoogieIcfgContainer [2018-10-23 20:21:56,316 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:21:56,317 INFO L168 Benchmark]: Toolchain (without parser) took 224594.91 ms. Allocated memory was 1.5 GB in the beginning and 4.5 GB in the end (delta: 2.9 GB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 178.5 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-23 20:21:56,318 INFO L168 Benchmark]: CDTParser took 0.25 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 20:21:56,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2518.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. [2018-10-23 20:21:56,320 INFO L168 Benchmark]: Boogie Procedure Inliner took 822.69 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 825.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 83.6 MB. Max. memory is 7.1 GB. [2018-10-23 20:21:56,321 INFO L168 Benchmark]: Boogie Preprocessor took 524.83 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 68.8 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. [2018-10-23 20:21:56,322 INFO L168 Benchmark]: RCFGBuilder took 13150.84 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 237.0 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 37.4 MB). Peak memory consumption was 600.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:21:56,323 INFO L168 Benchmark]: TraceAbstraction took 207572.71 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.2 GB in the end (delta: 841.6 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-10-23 20:21:56,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 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 2518.70 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 256.3 MB). Peak memory consumption was 256.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 822.69 ms. Allocated memory was 1.5 GB in the beginning and 2.4 GB in the end (delta: 825.8 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 83.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 524.83 ms. Allocated memory is still 2.4 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 68.8 MB). Peak memory consumption was 68.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 13150.84 ms. Allocated memory was 2.4 GB in the beginning and 2.6 GB in the end (delta: 237.0 MB). Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 37.4 MB). Peak memory consumption was 600.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 207572.71 ms. Allocated memory was 2.6 GB in the beginning and 4.5 GB in the end (delta: 1.9 GB). Free memory was 2.1 GB in the beginning and 1.2 GB in the end (delta: 841.6 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 108). Cancelled while BasicCegarLoop was constructing difference of abstraction (233615states) and FLOYD_HOARE automaton (currently 4 states, 10 states before enhancement),while ReachableStatesComputation was computing reachable states (893 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 1099 locations, 1 error locations. TIMEOUT Result, 207.4s OverallTime, 13 OverallIterations, 7 TraceHistogramMax, 167.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 8913 SDtfs, 34311 SDslu, 3209 SDs, 0 SdLazy, 66805 SolverSat, 18235 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 134.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1240 GetRequests, 1188 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=239924occurred in iteration=11, 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: 26.4s AutomataMinimizationTime, 12 MinimizatonAttempts, 78652 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 5895 NumberOfCodeBlocks, 5895 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 5879 ConstructedInterpolants, 90 QuantifiedInterpolants, 9524249 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1521 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 16 InterpolantComputations, 13 PerfectInterpolantSequences, 6780/7441 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown