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/Problem03_label47_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 15:00:27,887 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 15:00:27,889 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 15:00:27,906 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 15:00:27,906 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 15:00:27,907 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 15:00:27,910 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 15:00:27,912 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 15:00:27,915 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 15:00:27,916 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 15:00:27,918 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 15:00:27,919 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 15:00:27,919 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 15:00:27,921 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 15:00:27,928 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 15:00:27,929 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 15:00:27,930 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 15:00:27,932 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 15:00:27,934 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 15:00:27,936 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 15:00:27,937 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 15:00:27,938 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 15:00:27,940 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 15:00:27,949 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 [2018-10-24 15:00:27,968 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 15:00:27,969 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 15:00:27,970 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 15:00:27,970 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 15:00:27,971 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 15:00:27,971 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 15:00:27,971 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 15:00:27,973 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 15:00:27,973 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 15:00:27,973 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 15:00:27,973 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 15:00:27,973 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 15:00:27,974 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 15:00:27,974 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 15:00:27,974 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 15:00:27,974 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 15:00:27,974 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 15:00:27,975 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 15:00:27,975 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 15:00:27,975 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 15:00:27,975 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 15:00:27,975 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 15:00:27,975 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 15:00:27,976 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 15:00:27,976 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 15:00:27,976 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 15:00:27,976 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 15:00:27,976 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 15:00:28,046 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 15:00:28,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 15:00:28,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 15:00:28,072 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 15:00:28,072 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 15:00:28,073 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c [2018-10-24 15:00:28,143 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/28b6d689a/99b33e1b186f4f0eb8944d92382f8276/FLAG8eead3621 [2018-10-24 15:00:28,790 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 15:00:28,792 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label47_true-unreach-call.c [2018-10-24 15:00:28,811 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/28b6d689a/99b33e1b186f4f0eb8944d92382f8276/FLAG8eead3621 [2018-10-24 15:00:28,835 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/28b6d689a/99b33e1b186f4f0eb8944d92382f8276 [2018-10-24 15:00:28,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 15:00:28,851 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 15:00:28,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 15:00:28,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 15:00:28,856 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 15:00:28,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:00:28" (1/1) ... [2018-10-24 15:00:28,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309cd1a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:28, skipping insertion in model container [2018-10-24 15:00:28,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:00:28" (1/1) ... [2018-10-24 15:00:28,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 15:00:28,983 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 15:00:29,923 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 15:00:29,929 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 15:00:30,157 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 15:00:30,181 INFO L193 MainTranslator]: Completed translation [2018-10-24 15:00:30,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30 WrapperNode [2018-10-24 15:00:30,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 15:00:30,183 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 15:00:30,183 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 15:00:30,183 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 15:00:30,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,248 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 15:00:30,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 15:00:30,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 15:00:30,512 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 15:00:30,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (1/1) ... [2018-10-24 15:00:30,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 15:00:30,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 15:00:30,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 15:00:30,640 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 15:00:30,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (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 [2018-10-24 15:00:30,701 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 15:00:30,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 15:00:30,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 15:00:36,569 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 15:00:36,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:00:36 BoogieIcfgContainer [2018-10-24 15:00:36,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 15:00:36,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 15:00:36,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 15:00:36,575 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 15:00:36,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:00:28" (1/3) ... [2018-10-24 15:00:36,576 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da5d89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:00:36, skipping insertion in model container [2018-10-24 15:00:36,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:00:30" (2/3) ... [2018-10-24 15:00:36,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da5d89a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:00:36, skipping insertion in model container [2018-10-24 15:00:36,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:00:36" (3/3) ... [2018-10-24 15:00:36,579 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label47_true-unreach-call.c [2018-10-24 15:00:36,590 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 15:00:36,599 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 15:00:36,615 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 15:00:36,652 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 15:00:36,653 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 15:00:36,653 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 15:00:36,653 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 15:00:36,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 15:00:36,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 15:00:36,654 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 15:00:36,654 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 15:00:36,654 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 15:00:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states. [2018-10-24 15:00:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-24 15:00:36,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:36,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:00:36,707 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:36,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:36,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1022585908, now seen corresponding path program 1 times [2018-10-24 15:00:36,716 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:36,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:36,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:36,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:36,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:37,698 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 15:00:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:00:37,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:37,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:00:37,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:00:37,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:00:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:00:37,848 INFO L87 Difference]: Start difference. First operand 303 states. Second operand 4 states. [2018-10-24 15:00:41,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:41,452 INFO L93 Difference]: Finished difference Result 1079 states and 1933 transitions. [2018-10-24 15:00:41,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:00:41,454 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 198 [2018-10-24 15:00:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:41,480 INFO L225 Difference]: With dead ends: 1079 [2018-10-24 15:00:41,481 INFO L226 Difference]: Without dead ends: 769 [2018-10-24 15:00:41,486 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 [2018-10-24 15:00:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2018-10-24 15:00:41,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 513. [2018-10-24 15:00:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2018-10-24 15:00:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 851 transitions. [2018-10-24 15:00:41,586 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 851 transitions. Word has length 198 [2018-10-24 15:00:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:41,587 INFO L481 AbstractCegarLoop]: Abstraction has 513 states and 851 transitions. [2018-10-24 15:00:41,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:00:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 851 transitions. [2018-10-24 15:00:41,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-24 15:00:41,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:41,594 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 15:00:41,595 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:41,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1365528693, now seen corresponding path program 1 times [2018-10-24 15:00:41,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:41,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:41,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:41,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:41,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:00:41,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:41,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:00:41,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:00:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:00:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:41,746 INFO L87 Difference]: Start difference. First operand 513 states and 851 transitions. Second operand 3 states. [2018-10-24 15:00:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:43,790 INFO L93 Difference]: Finished difference Result 1449 states and 2462 transitions. [2018-10-24 15:00:43,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:00:43,791 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2018-10-24 15:00:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:43,798 INFO L225 Difference]: With dead ends: 1449 [2018-10-24 15:00:43,798 INFO L226 Difference]: Without dead ends: 938 [2018-10-24 15:00:43,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2018-10-24 15:00:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 923. [2018-10-24 15:00:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2018-10-24 15:00:43,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1514 transitions. [2018-10-24 15:00:43,860 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1514 transitions. Word has length 207 [2018-10-24 15:00:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:43,861 INFO L481 AbstractCegarLoop]: Abstraction has 923 states and 1514 transitions. [2018-10-24 15:00:43,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:00:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1514 transitions. [2018-10-24 15:00:43,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-24 15:00:43,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:43,867 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-24 15:00:43,867 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:43,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:43,868 INFO L82 PathProgramCache]: Analyzing trace with hash -8302093, now seen corresponding path program 1 times [2018-10-24 15:00:43,870 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:43,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:43,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:43,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:43,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:44,130 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 15:00:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:00:44,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:44,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:00:44,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:00:44,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:00:44,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:00:44,162 INFO L87 Difference]: Start difference. First operand 923 states and 1514 transitions. Second operand 4 states. [2018-10-24 15:00:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:48,630 INFO L93 Difference]: Finished difference Result 3529 states and 5871 transitions. [2018-10-24 15:00:48,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:00:48,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 208 [2018-10-24 15:00:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:48,646 INFO L225 Difference]: With dead ends: 3529 [2018-10-24 15:00:48,647 INFO L226 Difference]: Without dead ends: 2608 [2018-10-24 15:00:48,650 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 [2018-10-24 15:00:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2018-10-24 15:00:48,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1750. [2018-10-24 15:00:48,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1750 states. [2018-10-24 15:00:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1750 states to 1750 states and 2700 transitions. [2018-10-24 15:00:48,698 INFO L78 Accepts]: Start accepts. Automaton has 1750 states and 2700 transitions. Word has length 208 [2018-10-24 15:00:48,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:48,699 INFO L481 AbstractCegarLoop]: Abstraction has 1750 states and 2700 transitions. [2018-10-24 15:00:48,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:00:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1750 states and 2700 transitions. [2018-10-24 15:00:48,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2018-10-24 15:00:48,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:48,705 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:00:48,705 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:48,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:48,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1335916449, now seen corresponding path program 1 times [2018-10-24 15:00:48,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:48,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:48,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:48,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:48,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 15:00:49,027 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:49,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:00:49,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:00:49,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:00:49,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:49,028 INFO L87 Difference]: Start difference. First operand 1750 states and 2700 transitions. Second operand 3 states. [2018-10-24 15:00:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:50,897 INFO L93 Difference]: Finished difference Result 5137 states and 7972 transitions. [2018-10-24 15:00:50,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:00:50,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 215 [2018-10-24 15:00:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:50,982 INFO L225 Difference]: With dead ends: 5137 [2018-10-24 15:00:50,983 INFO L226 Difference]: Without dead ends: 3389 [2018-10-24 15:00:50,986 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 [2018-10-24 15:00:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3389 states. [2018-10-24 15:00:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3389 to 3388. [2018-10-24 15:00:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3388 states. [2018-10-24 15:00:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 4864 transitions. [2018-10-24 15:00:51,053 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 4864 transitions. Word has length 215 [2018-10-24 15:00:51,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:51,054 INFO L481 AbstractCegarLoop]: Abstraction has 3388 states and 4864 transitions. [2018-10-24 15:00:51,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:00:51,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 4864 transitions. [2018-10-24 15:00:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-24 15:00:51,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:51,064 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:00:51,064 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:51,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 998109120, now seen corresponding path program 1 times [2018-10-24 15:00:51,065 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:51,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:51,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:51,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:51,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-24 15:00:51,271 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:51,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:00:51,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:00:51,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:00:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:51,273 INFO L87 Difference]: Start difference. First operand 3388 states and 4864 transitions. Second operand 3 states. [2018-10-24 15:00:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:53,024 INFO L93 Difference]: Finished difference Result 8419 states and 12026 transitions. [2018-10-24 15:00:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:00:53,025 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2018-10-24 15:00:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:53,046 INFO L225 Difference]: With dead ends: 8419 [2018-10-24 15:00:53,046 INFO L226 Difference]: Without dead ends: 5033 [2018-10-24 15:00:53,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2018-10-24 15:00:53,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 5032. [2018-10-24 15:00:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5032 states. [2018-10-24 15:00:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5032 states to 5032 states and 7054 transitions. [2018-10-24 15:00:53,142 INFO L78 Accepts]: Start accepts. Automaton has 5032 states and 7054 transitions. Word has length 237 [2018-10-24 15:00:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:53,143 INFO L481 AbstractCegarLoop]: Abstraction has 5032 states and 7054 transitions. [2018-10-24 15:00:53,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:00:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 5032 states and 7054 transitions. [2018-10-24 15:00:53,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-24 15:00:53,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:53,157 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 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] [2018-10-24 15:00:53,157 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:53,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash 377514233, now seen corresponding path program 1 times [2018-10-24 15:00:53,159 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:53,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:53,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:53,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:53,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:53,439 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-24 15:00:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-24 15:00:53,499 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:53,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 15:00:53,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:00:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:00:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:00:53,501 INFO L87 Difference]: Start difference. First operand 5032 states and 7054 transitions. Second operand 4 states. [2018-10-24 15:00:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:55,860 INFO L93 Difference]: Finished difference Result 17817 states and 24983 transitions. [2018-10-24 15:00:55,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:00:55,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2018-10-24 15:00:55,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:55,903 INFO L225 Difference]: With dead ends: 17817 [2018-10-24 15:00:55,903 INFO L226 Difference]: Without dead ends: 12787 [2018-10-24 15:00:55,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:00:55,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12787 states. [2018-10-24 15:00:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12787 to 12784. [2018-10-24 15:00:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12784 states. [2018-10-24 15:00:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12784 states to 12784 states and 15898 transitions. [2018-10-24 15:00:56,151 INFO L78 Accepts]: Start accepts. Automaton has 12784 states and 15898 transitions. Word has length 243 [2018-10-24 15:00:56,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:56,151 INFO L481 AbstractCegarLoop]: Abstraction has 12784 states and 15898 transitions. [2018-10-24 15:00:56,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:00:56,152 INFO L276 IsEmpty]: Start isEmpty. Operand 12784 states and 15898 transitions. [2018-10-24 15:00:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-24 15:00:56,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:56,184 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 15:00:56,184 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:56,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:56,184 INFO L82 PathProgramCache]: Analyzing trace with hash -982342532, now seen corresponding path program 1 times [2018-10-24 15:00:56,185 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:56,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:56,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:56,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:56,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-10-24 15:00:56,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:56,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:00:56,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:00:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:00:56,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:56,339 INFO L87 Difference]: Start difference. First operand 12784 states and 15898 transitions. Second operand 3 states. [2018-10-24 15:00:57,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:00:57,621 INFO L93 Difference]: Finished difference Result 25534 states and 31751 transitions. [2018-10-24 15:00:57,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:00:57,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2018-10-24 15:00:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:00:57,653 INFO L225 Difference]: With dead ends: 25534 [2018-10-24 15:00:57,653 INFO L226 Difference]: Without dead ends: 12752 [2018-10-24 15:00:57,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:00:57,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12752 states. [2018-10-24 15:00:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12752 to 12752. [2018-10-24 15:00:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2018-10-24 15:00:57,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 15586 transitions. [2018-10-24 15:00:57,863 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 15586 transitions. Word has length 255 [2018-10-24 15:00:57,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:00:57,864 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states and 15586 transitions. [2018-10-24 15:00:57,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:00:57,864 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 15586 transitions. [2018-10-24 15:00:57,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-24 15:00:57,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:00:57,889 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, 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] [2018-10-24 15:00:57,889 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:00:57,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:00:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -230806498, now seen corresponding path program 1 times [2018-10-24 15:00:57,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:00:57,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:00:57,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:57,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:00:57,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:00:57,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:00:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:00:58,243 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:00:58,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:00:58,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:00:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:00:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:00:58,245 INFO L87 Difference]: Start difference. First operand 12752 states and 15586 transitions. Second operand 4 states. [2018-10-24 15:01:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:00,543 INFO L93 Difference]: Finished difference Result 31260 states and 37941 transitions. [2018-10-24 15:01:00,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:01:00,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 262 [2018-10-24 15:01:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:00,582 INFO L225 Difference]: With dead ends: 31260 [2018-10-24 15:01:00,582 INFO L226 Difference]: Without dead ends: 18510 [2018-10-24 15:01:00,598 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 [2018-10-24 15:01:00,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18510 states. [2018-10-24 15:01:00,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18510 to 13784. [2018-10-24 15:01:00,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13784 states. [2018-10-24 15:01:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13784 states to 13784 states and 16777 transitions. [2018-10-24 15:01:00,816 INFO L78 Accepts]: Start accepts. Automaton has 13784 states and 16777 transitions. Word has length 262 [2018-10-24 15:01:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:00,817 INFO L481 AbstractCegarLoop]: Abstraction has 13784 states and 16777 transitions. [2018-10-24 15:01:00,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:01:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13784 states and 16777 transitions. [2018-10-24 15:01:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-24 15:01:00,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:00,843 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 15:01:00,843 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:00,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:00,844 INFO L82 PathProgramCache]: Analyzing trace with hash -939264822, now seen corresponding path program 1 times [2018-10-24 15:01:00,844 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:00,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:00,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 74 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:01,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:01:01,321 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 15:01:01,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:01,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:01,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:01:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:02,000 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:01:02,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2018-10-24 15:01:02,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 15:01:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 15:01:02,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 15:01:02,002 INFO L87 Difference]: Start difference. First operand 13784 states and 16777 transitions. Second operand 6 states. [2018-10-24 15:01:02,579 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 15:01:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:09,168 INFO L93 Difference]: Finished difference Result 51340 states and 62699 transitions. [2018-10-24 15:01:09,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 15:01:09,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 270 [2018-10-24 15:01:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:09,235 INFO L225 Difference]: With dead ends: 51340 [2018-10-24 15:01:09,235 INFO L226 Difference]: Without dead ends: 37558 [2018-10-24 15:01:09,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-10-24 15:01:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37558 states. [2018-10-24 15:01:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37558 to 37350. [2018-10-24 15:01:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37350 states. [2018-10-24 15:01:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37350 states to 37350 states and 44192 transitions. [2018-10-24 15:01:09,972 INFO L78 Accepts]: Start accepts. Automaton has 37350 states and 44192 transitions. Word has length 270 [2018-10-24 15:01:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:09,973 INFO L481 AbstractCegarLoop]: Abstraction has 37350 states and 44192 transitions. [2018-10-24 15:01:09,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 15:01:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 37350 states and 44192 transitions. [2018-10-24 15:01:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-10-24 15:01:10,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:10,046 INFO L375 BasicCegarLoop]: trace histogram [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, 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] [2018-10-24 15:01:10,047 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:10,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:10,047 INFO L82 PathProgramCache]: Analyzing trace with hash 341743418, now seen corresponding path program 1 times [2018-10-24 15:01:10,047 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:10,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:10,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:10,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:10,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:10,612 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-10-24 15:01:10,876 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 7 [2018-10-24 15:01:11,064 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-10-24 15:01:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 101 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2018-10-24 15:01:11,328 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:01:11,328 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 [2018-10-24 15:01:11,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:11,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:01:11,830 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:11,851 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:01:11,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2018-10-24 15:01:11,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 15:01:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 15:01:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-10-24 15:01:11,853 INFO L87 Difference]: Start difference. First operand 37350 states and 44192 transitions. Second operand 9 states. [2018-10-24 15:01:22,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:22,232 INFO L93 Difference]: Finished difference Result 224681 states and 262330 transitions. [2018-10-24 15:01:22,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 15:01:22,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 312 [2018-10-24 15:01:22,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:22,506 INFO L225 Difference]: With dead ends: 224681 [2018-10-24 15:01:22,506 INFO L226 Difference]: Without dead ends: 187333 [2018-10-24 15:01:22,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2018-10-24 15:01:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187333 states. [2018-10-24 15:01:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187333 to 179926. [2018-10-24 15:01:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179926 states. [2018-10-24 15:01:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179926 states to 179926 states and 207267 transitions. [2018-10-24 15:01:25,639 INFO L78 Accepts]: Start accepts. Automaton has 179926 states and 207267 transitions. Word has length 312 [2018-10-24 15:01:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:25,640 INFO L481 AbstractCegarLoop]: Abstraction has 179926 states and 207267 transitions. [2018-10-24 15:01:25,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 15:01:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 179926 states and 207267 transitions. [2018-10-24 15:01:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2018-10-24 15:01:25,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:25,687 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, 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, 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] [2018-10-24 15:01:25,687 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:25,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:25,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1086071963, now seen corresponding path program 1 times [2018-10-24 15:01:25,688 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:25,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:25,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:25,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:25,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 15:01:25,909 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:25,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 15:01:25,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:01:25,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:01:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:01:25,911 INFO L87 Difference]: Start difference. First operand 179926 states and 207267 transitions. Second operand 3 states. [2018-10-24 15:01:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:28,545 INFO L93 Difference]: Finished difference Result 349859 states and 403564 transitions. [2018-10-24 15:01:28,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:01:28,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 323 [2018-10-24 15:01:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:28,732 INFO L225 Difference]: With dead ends: 349859 [2018-10-24 15:01:28,732 INFO L226 Difference]: Without dead ends: 169935 [2018-10-24 15:01:28,828 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 [2018-10-24 15:01:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169935 states. [2018-10-24 15:01:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169935 to 167674. [2018-10-24 15:01:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167674 states. [2018-10-24 15:01:31,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167674 states to 167674 states and 186284 transitions. [2018-10-24 15:01:31,553 INFO L78 Accepts]: Start accepts. Automaton has 167674 states and 186284 transitions. Word has length 323 [2018-10-24 15:01:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:31,553 INFO L481 AbstractCegarLoop]: Abstraction has 167674 states and 186284 transitions. [2018-10-24 15:01:31,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:01:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 167674 states and 186284 transitions. [2018-10-24 15:01:31,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-10-24 15:01:31,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:31,598 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-10-24 15:01:31,599 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:31,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:31,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1202029114, now seen corresponding path program 1 times [2018-10-24 15:01:31,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:31,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:31,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:31,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:31,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-24 15:01:32,063 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:01:32,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 15:01:32,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 15:01:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 15:01:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 15:01:32,064 INFO L87 Difference]: Start difference. First operand 167674 states and 186284 transitions. Second operand 5 states. [2018-10-24 15:01:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:01:39,592 INFO L93 Difference]: Finished difference Result 768522 states and 852058 transitions. [2018-10-24 15:01:39,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 15:01:39,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2018-10-24 15:01:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:01:40,368 INFO L225 Difference]: With dead ends: 768522 [2018-10-24 15:01:40,368 INFO L226 Difference]: Without dead ends: 600850 [2018-10-24 15:01:40,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 15:01:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600850 states. [2018-10-24 15:01:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600850 to 439722. [2018-10-24 15:01:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439722 states. [2018-10-24 15:01:53,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439722 states to 439722 states and 486511 transitions. [2018-10-24 15:01:53,017 INFO L78 Accepts]: Start accepts. Automaton has 439722 states and 486511 transitions. Word has length 336 [2018-10-24 15:01:53,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:01:53,018 INFO L481 AbstractCegarLoop]: Abstraction has 439722 states and 486511 transitions. [2018-10-24 15:01:53,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 15:01:53,018 INFO L276 IsEmpty]: Start isEmpty. Operand 439722 states and 486511 transitions. [2018-10-24 15:01:53,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2018-10-24 15:01:53,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:01:53,047 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 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] [2018-10-24 15:01:53,047 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:01:53,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:01:53,048 INFO L82 PathProgramCache]: Analyzing trace with hash 537598670, now seen corresponding path program 1 times [2018-10-24 15:01:53,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:01:53,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:01:53,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:53,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:53,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:01:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 164 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-24 15:01:53,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:01:53,627 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 [2018-10-24 15:01:53,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:01:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:01:53,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:01:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2018-10-24 15:01:55,256 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:01:55,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2018-10-24 15:01:55,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 15:01:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 15:01:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 15:01:55,258 INFO L87 Difference]: Start difference. First operand 439722 states and 486511 transitions. Second operand 5 states. [2018-10-24 15:02:01,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:01,638 INFO L93 Difference]: Finished difference Result 847700 states and 936882 transitions. [2018-10-24 15:02:01,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:02:01,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 358 [2018-10-24 15:02:01,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:02,216 INFO L225 Difference]: With dead ends: 847700 [2018-10-24 15:02:02,216 INFO L226 Difference]: Without dead ends: 407980 [2018-10-24 15:02:02,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 15:02:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407980 states. [2018-10-24 15:02:07,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407980 to 395894. [2018-10-24 15:02:07,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395894 states. [2018-10-24 15:02:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395894 states to 395894 states and 430508 transitions. [2018-10-24 15:02:08,216 INFO L78 Accepts]: Start accepts. Automaton has 395894 states and 430508 transitions. Word has length 358 [2018-10-24 15:02:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:08,217 INFO L481 AbstractCegarLoop]: Abstraction has 395894 states and 430508 transitions. [2018-10-24 15:02:08,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 15:02:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 395894 states and 430508 transitions. [2018-10-24 15:02:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2018-10-24 15:02:08,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:08,272 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 15:02:08,272 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:08,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:08,272 INFO L82 PathProgramCache]: Analyzing trace with hash -655862127, now seen corresponding path program 1 times [2018-10-24 15:02:08,272 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:08,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:08,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:08,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:08,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2018-10-24 15:02:09,702 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 15:02:09,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 15:02:09,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 15:02:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 15:02:09,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:02:09,703 INFO L87 Difference]: Start difference. First operand 395894 states and 430508 transitions. Second operand 3 states. [2018-10-24 15:02:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:19,190 INFO L93 Difference]: Finished difference Result 982671 states and 1066476 transitions. [2018-10-24 15:02:19,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 15:02:19,191 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 416 [2018-10-24 15:02:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:20,020 INFO L225 Difference]: With dead ends: 982671 [2018-10-24 15:02:20,020 INFO L226 Difference]: Without dead ends: 586779 [2018-10-24 15:02:20,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 15:02:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586779 states. [2018-10-24 15:02:27,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586779 to 586765. [2018-10-24 15:02:27,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 586765 states. [2018-10-24 15:02:29,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586765 states to 586765 states and 635910 transitions. [2018-10-24 15:02:29,823 INFO L78 Accepts]: Start accepts. Automaton has 586765 states and 635910 transitions. Word has length 416 [2018-10-24 15:02:29,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:02:29,824 INFO L481 AbstractCegarLoop]: Abstraction has 586765 states and 635910 transitions. [2018-10-24 15:02:29,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 15:02:29,824 INFO L276 IsEmpty]: Start isEmpty. Operand 586765 states and 635910 transitions. [2018-10-24 15:02:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-10-24 15:02:29,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:02:29,934 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2018-10-24 15:02:29,934 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:02:29,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:02:29,935 INFO L82 PathProgramCache]: Analyzing trace with hash 730904459, now seen corresponding path program 1 times [2018-10-24 15:02:29,935 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:02:29,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:02:29,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:29,936 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:29,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:02:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 383 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-24 15:02:30,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:02:30,317 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 [2018-10-24 15:02:30,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:02:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:02:30,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:02:30,619 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2018-10-24 15:02:30,655 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:02:30,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-10-24 15:02:30,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 15:02:30,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 15:02:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:30,657 INFO L87 Difference]: Start difference. First operand 586765 states and 635910 transitions. Second operand 4 states. [2018-10-24 15:02:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:02:39,750 INFO L93 Difference]: Finished difference Result 1634843 states and 1767020 transitions. [2018-10-24 15:02:39,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 15:02:39,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 456 [2018-10-24 15:02:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 15:02:53,265 INFO L225 Difference]: With dead ends: 1634843 [2018-10-24 15:02:53,265 INFO L226 Difference]: Without dead ends: 1033272 [2018-10-24 15:02:53,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 15:02:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033272 states. [2018-10-24 15:03:05,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033272 to 806888. [2018-10-24 15:03:05,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806888 states. [2018-10-24 15:03:07,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806888 states to 806888 states and 867690 transitions. [2018-10-24 15:03:07,038 INFO L78 Accepts]: Start accepts. Automaton has 806888 states and 867690 transitions. Word has length 456 [2018-10-24 15:03:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 15:03:07,039 INFO L481 AbstractCegarLoop]: Abstraction has 806888 states and 867690 transitions. [2018-10-24 15:03:07,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 15:03:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 806888 states and 867690 transitions. [2018-10-24 15:03:08,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2018-10-24 15:03:08,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 15:03:08,931 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 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] [2018-10-24 15:03:08,932 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 15:03:08,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 15:03:08,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1934620796, now seen corresponding path program 1 times [2018-10-24 15:03:08,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 15:03:08,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 15:03:08,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:03:08,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:03:08,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 15:03:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:03:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 303 proven. 111 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-10-24 15:03:09,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 15:03:09,683 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 15:03:09,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 15:03:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 15:03:09,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 15:03:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-10-24 15:03:10,051 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 15:03:10,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-10-24 15:03:10,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 15:03:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 15:03:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-24 15:03:10,053 INFO L87 Difference]: Start difference. First operand 806888 states and 867690 transitions. Second operand 7 states. [2018-10-24 15:03:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 15:03:42,847 INFO L93 Difference]: Finished difference Result 2983360 states and 3189397 transitions. [2018-10-24 15:03:42,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 15:03:42,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 469 [2018-10-24 15:03:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2018-10-24 15:03:46,719 INFO L225 Difference]: With dead ends: 2983360 [2018-10-24 15:03:46,719 INFO L226 Difference]: Without dead ends: 2176474 [2018-10-24 15:03:47,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-10-24 15:03:48,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176474 states. [2018-10-24 15:03:48,791 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 15:03:48,795 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 15:03:48,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 03:03:48 BoogieIcfgContainer [2018-10-24 15:03:48,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 15:03:48,796 INFO L168 Benchmark]: Toolchain (without parser) took 199947.28 ms. Allocated memory was 1.5 GB in the beginning and 7.0 GB in the end (delta: 5.5 GB). Free memory was 1.4 GB in the beginning and 3.5 GB in the end (delta: -2.1 GB). Peak memory consumption was 3.5 GB. Max. memory is 7.1 GB. [2018-10-24 15:03:48,798 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-10-24 15:03:48,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1330.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. [2018-10-24 15:03:48,799 INFO L168 Benchmark]: Boogie Procedure Inliner took 328.57 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 687.3 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -800.4 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. [2018-10-24 15:03:48,800 INFO L168 Benchmark]: Boogie Preprocessor took 127.31 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2018-10-24 15:03:48,801 INFO L168 Benchmark]: RCFGBuilder took 5930.46 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 256.9 MB). Peak memory consumption was 256.9 MB. Max. memory is 7.1 GB. [2018-10-24 15:03:48,801 INFO L168 Benchmark]: TraceAbstraction took 192224.27 ms. Allocated memory was 2.2 GB in the beginning and 7.0 GB in the end (delta: 4.8 GB). Free memory was 1.8 GB in the beginning and 3.5 GB in the end (delta: -1.7 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. [2018-10-24 15:03:48,810 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1330.73 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 74.0 MB). Peak memory consumption was 74.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 328.57 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 687.3 MB). Free memory was 1.3 GB in the beginning and 2.1 GB in the end (delta: -800.4 MB). Peak memory consumption was 40.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.31 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 2.1 GB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 5930.46 ms. Allocated memory is still 2.2 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 256.9 MB). Peak memory consumption was 256.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 192224.27 ms. Allocated memory was 2.2 GB in the beginning and 7.0 GB in the end (delta: 4.8 GB). Free memory was 1.8 GB in the beginning and 3.5 GB in the end (delta: -1.7 GB). Peak memory consumption was 3.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 1626]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1626). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 303 locations, 1 error locations. TIMEOUT Result, 192.1s OverallTime, 16 OverallIterations, 7 TraceHistogramMax, 127.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4514 SDtfs, 16508 SDslu, 4080 SDs, 0 SdLazy, 22193 SolverSat, 4426 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 42.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1949 GetRequests, 1886 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=806888occurred in iteration=15, 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: 50.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 415348 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 7.5s InterpolantComputationTime, 6630 NumberOfCodeBlocks, 6630 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 6609 ConstructedInterpolants, 0 QuantifiedInterpolants, 4984062 SizeOfPredicates, 7 NumberOfNonLiveVariables, 3145 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 21 InterpolantComputations, 16 PerfectInterpolantSequences, 3606/3739 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown