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/Problem15_label17_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 16:34:10,832 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 16:34:10,836 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 16:34:10,848 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 16:34:10,849 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 16:34:10,850 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 16:34:10,851 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 16:34:10,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 16:34:10,854 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 16:34:10,855 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 16:34:10,856 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 16:34:10,856 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 16:34:10,857 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 16:34:10,858 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 16:34:10,860 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 16:34:10,860 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 16:34:10,861 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 16:34:10,863 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 16:34:10,865 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 16:34:10,867 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 16:34:10,868 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 16:34:10,869 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 16:34:10,871 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 16:34:10,881 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 16:34:10,895 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 16:34:10,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 16:34:10,896 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 16:34:10,896 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 16:34:10,897 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 16:34:10,897 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 16:34:10,897 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 16:34:10,898 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 16:34:10,898 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 16:34:10,898 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 16:34:10,898 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 16:34:10,898 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 16:34:10,898 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 16:34:10,899 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 16:34:10,899 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 16:34:10,899 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 16:34:10,899 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 16:34:10,900 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 16:34:10,901 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 16:34:10,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 16:34:10,901 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 16:34:10,901 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 16:34:10,902 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 16:34:10,902 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 16:34:10,902 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 16:34:10,902 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 16:34:10,903 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 16:34:10,903 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 16:34:10,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 16:34:10,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 16:34:10,980 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 16:34:10,981 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 16:34:10,982 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 16:34:10,982 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c [2018-10-24 16:34:11,043 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1abc1f1ab/31db9992c5e54e3ca1fb7a2f96db1199/FLAG8d19f21d9 [2018-10-24 16:34:11,739 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 16:34:11,741 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label17_true-unreach-call.c [2018-10-24 16:34:11,767 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1abc1f1ab/31db9992c5e54e3ca1fb7a2f96db1199/FLAG8d19f21d9 [2018-10-24 16:34:11,786 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/1abc1f1ab/31db9992c5e54e3ca1fb7a2f96db1199 [2018-10-24 16:34:11,799 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 16:34:11,801 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 16:34:11,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 16:34:11,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 16:34:11,808 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 16:34:11,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:34:11" (1/1) ... [2018-10-24 16:34:11,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769a0e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:11, skipping insertion in model container [2018-10-24 16:34:11,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 04:34:11" (1/1) ... [2018-10-24 16:34:11,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 16:34:11,932 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 16:34:12,823 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:34:12,828 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 16:34:13,095 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 16:34:13,119 INFO L193 MainTranslator]: Completed translation [2018-10-24 16:34:13,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13 WrapperNode [2018-10-24 16:34:13,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 16:34:13,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 16:34:13,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 16:34:13,121 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 16:34:13,132 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,184 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 16:34:13,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 16:34:13,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 16:34:13,551 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 16:34:13,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (1/1) ... [2018-10-24 16:34:13,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 16:34:13,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 16:34:13,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 16:34:13,754 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 16:34:13,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (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 16:34:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-24 16:34:13,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 16:34:13,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 16:34:22,184 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 16:34:22,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:34:22 BoogieIcfgContainer [2018-10-24 16:34:22,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 16:34:22,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 16:34:22,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 16:34:22,190 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 16:34:22,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 04:34:11" (1/3) ... [2018-10-24 16:34:22,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bc47fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:34:22, skipping insertion in model container [2018-10-24 16:34:22,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 04:34:13" (2/3) ... [2018-10-24 16:34:22,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60bc47fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 04:34:22, skipping insertion in model container [2018-10-24 16:34:22,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 04:34:22" (3/3) ... [2018-10-24 16:34:22,194 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label17_true-unreach-call.c [2018-10-24 16:34:22,205 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 16:34:22,215 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 16:34:22,233 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 16:34:22,272 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 16:34:22,273 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 16:34:22,273 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 16:34:22,274 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 16:34:22,274 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 16:34:22,274 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 16:34:22,274 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 16:34:22,274 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 16:34:22,274 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 16:34:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states. [2018-10-24 16:34:22,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-24 16:34:22,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:22,319 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] [2018-10-24 16:34:22,321 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:22,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:22,327 INFO L82 PathProgramCache]: Analyzing trace with hash -344880110, now seen corresponding path program 1 times [2018-10-24 16:34:22,328 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:22,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:22,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:22,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:22,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:22,825 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 16:34:22,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:34:22,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:34:22,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:34:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:34:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:34:22,852 INFO L87 Difference]: Start difference. First operand 425 states. Second operand 4 states. [2018-10-24 16:34:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:33,221 INFO L93 Difference]: Finished difference Result 1474 states and 2723 transitions. [2018-10-24 16:34:33,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:34:33,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2018-10-24 16:34:33,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:33,253 INFO L225 Difference]: With dead ends: 1474 [2018-10-24 16:34:33,253 INFO L226 Difference]: Without dead ends: 1042 [2018-10-24 16:34:33,259 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 16:34:33,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2018-10-24 16:34:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 1040. [2018-10-24 16:34:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1040 states. [2018-10-24 16:34:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1638 transitions. [2018-10-24 16:34:33,367 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1638 transitions. Word has length 64 [2018-10-24 16:34:33,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:33,367 INFO L481 AbstractCegarLoop]: Abstraction has 1040 states and 1638 transitions. [2018-10-24 16:34:33,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:34:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1638 transitions. [2018-10-24 16:34:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-24 16:34:33,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:33,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:34:33,375 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:33,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:33,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1862007571, now seen corresponding path program 1 times [2018-10-24 16:34:33,376 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:33,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:33,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:33,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:34:33,766 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:34:33,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:34:33,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:34:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:34:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:34:33,769 INFO L87 Difference]: Start difference. First operand 1040 states and 1638 transitions. Second operand 5 states. [2018-10-24 16:34:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:49,581 INFO L93 Difference]: Finished difference Result 3299 states and 5135 transitions. [2018-10-24 16:34:49,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:34:49,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2018-10-24 16:34:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:49,601 INFO L225 Difference]: With dead ends: 3299 [2018-10-24 16:34:49,601 INFO L226 Difference]: Without dead ends: 2261 [2018-10-24 16:34:49,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:34:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2261 states. [2018-10-24 16:34:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2261 to 1953. [2018-10-24 16:34:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1953 states. [2018-10-24 16:34:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2816 transitions. [2018-10-24 16:34:49,673 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2816 transitions. Word has length 130 [2018-10-24 16:34:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:49,674 INFO L481 AbstractCegarLoop]: Abstraction has 1953 states and 2816 transitions. [2018-10-24 16:34:49,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:34:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2816 transitions. [2018-10-24 16:34:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-24 16:34:49,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:49,682 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:34:49,683 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:49,683 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:49,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1218481597, now seen corresponding path program 1 times [2018-10-24 16:34:49,683 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:49,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:49,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:49,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:49,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:34:49,868 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:34:49,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:34:49,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:34:49,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:34:49,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:34:49,870 INFO L87 Difference]: Start difference. First operand 1953 states and 2816 transitions. Second operand 4 states. [2018-10-24 16:34:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:34:55,145 INFO L93 Difference]: Finished difference Result 7212 states and 10585 transitions. [2018-10-24 16:34:55,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:34:55,146 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2018-10-24 16:34:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:34:55,170 INFO L225 Difference]: With dead ends: 7212 [2018-10-24 16:34:55,171 INFO L226 Difference]: Without dead ends: 5261 [2018-10-24 16:34:55,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 16:34:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2018-10-24 16:34:55,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5255. [2018-10-24 16:34:55,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5255 states. [2018-10-24 16:34:55,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5255 states to 5255 states and 6986 transitions. [2018-10-24 16:34:55,276 INFO L78 Accepts]: Start accepts. Automaton has 5255 states and 6986 transitions. Word has length 135 [2018-10-24 16:34:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:34:55,277 INFO L481 AbstractCegarLoop]: Abstraction has 5255 states and 6986 transitions. [2018-10-24 16:34:55,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:34:55,277 INFO L276 IsEmpty]: Start isEmpty. Operand 5255 states and 6986 transitions. [2018-10-24 16:34:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-24 16:34:55,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:34:55,283 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 16:34:55,284 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:34:55,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:34:55,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1452802993, now seen corresponding path program 1 times [2018-10-24 16:34:55,284 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:34:55,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:34:55,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:55,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:55,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:34:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:55,643 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-24 16:34:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 123 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-24 16:34:55,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:34:55,725 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 16:34:55,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:34:55,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:34:55,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:34:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 16:34:55,997 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:34:55,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2018-10-24 16:34:55,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:34:55,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:34:55,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:34:56,001 INFO L87 Difference]: Start difference. First operand 5255 states and 6986 transitions. Second operand 4 states. [2018-10-24 16:35:01,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:01,047 INFO L93 Difference]: Finished difference Result 19280 states and 26028 transitions. [2018-10-24 16:35:01,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:35:01,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 236 [2018-10-24 16:35:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:01,100 INFO L225 Difference]: With dead ends: 19280 [2018-10-24 16:35:01,100 INFO L226 Difference]: Without dead ends: 14027 [2018-10-24 16:35:01,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:35:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14027 states. [2018-10-24 16:35:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14027 to 8857. [2018-10-24 16:35:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8857 states. [2018-10-24 16:35:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8857 states to 8857 states and 11192 transitions. [2018-10-24 16:35:01,301 INFO L78 Accepts]: Start accepts. Automaton has 8857 states and 11192 transitions. Word has length 236 [2018-10-24 16:35:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:01,302 INFO L481 AbstractCegarLoop]: Abstraction has 8857 states and 11192 transitions. [2018-10-24 16:35:01,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:35:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8857 states and 11192 transitions. [2018-10-24 16:35:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-24 16:35:01,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:01,312 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:35:01,313 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:01,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1564362749, now seen corresponding path program 1 times [2018-10-24 16:35:01,313 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:01,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:01,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:01,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:01,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-24 16:35:02,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:02,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:35:02,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:35:02,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:35:02,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:35:02,019 INFO L87 Difference]: Start difference. First operand 8857 states and 11192 transitions. Second operand 5 states. [2018-10-24 16:35:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:09,394 INFO L93 Difference]: Finished difference Result 19215 states and 24057 transitions. [2018-10-24 16:35:09,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:35:09,396 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 338 [2018-10-24 16:35:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:09,429 INFO L225 Difference]: With dead ends: 19215 [2018-10-24 16:35:09,429 INFO L226 Difference]: Without dead ends: 10360 [2018-10-24 16:35:09,436 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 16:35:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2018-10-24 16:35:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10057. [2018-10-24 16:35:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10057 states. [2018-10-24 16:35:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10057 states to 10057 states and 12448 transitions. [2018-10-24 16:35:09,618 INFO L78 Accepts]: Start accepts. Automaton has 10057 states and 12448 transitions. Word has length 338 [2018-10-24 16:35:09,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:09,622 INFO L481 AbstractCegarLoop]: Abstraction has 10057 states and 12448 transitions. [2018-10-24 16:35:09,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:35:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10057 states and 12448 transitions. [2018-10-24 16:35:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2018-10-24 16:35:09,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:09,636 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:35:09,636 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:09,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:09,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1832442485, now seen corresponding path program 1 times [2018-10-24 16:35:09,637 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:09,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:09,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:09,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:09,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:10,125 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2018-10-24 16:35:10,125 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:10,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:35:10,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:35:10,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:35:10,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:35:10,127 INFO L87 Difference]: Start difference. First operand 10057 states and 12448 transitions. Second operand 4 states. [2018-10-24 16:35:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:19,226 INFO L93 Difference]: Finished difference Result 26114 states and 32759 transitions. [2018-10-24 16:35:19,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:35:19,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 412 [2018-10-24 16:35:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:19,263 INFO L225 Difference]: With dead ends: 26114 [2018-10-24 16:35:19,264 INFO L226 Difference]: Without dead ends: 16059 [2018-10-24 16:35:19,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 16:35:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16059 states. [2018-10-24 16:35:19,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16059 to 15759. [2018-10-24 16:35:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15759 states. [2018-10-24 16:35:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15759 states to 15759 states and 18917 transitions. [2018-10-24 16:35:19,496 INFO L78 Accepts]: Start accepts. Automaton has 15759 states and 18917 transitions. Word has length 412 [2018-10-24 16:35:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:19,497 INFO L481 AbstractCegarLoop]: Abstraction has 15759 states and 18917 transitions. [2018-10-24 16:35:19,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:35:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 15759 states and 18917 transitions. [2018-10-24 16:35:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2018-10-24 16:35:19,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:19,517 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2018-10-24 16:35:19,518 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:19,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1511869154, now seen corresponding path program 1 times [2018-10-24 16:35:19,518 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:19,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:19,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:19,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:19,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-24 16:35:20,311 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:20,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-24 16:35:20,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 16:35:20,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 16:35:20,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-24 16:35:20,313 INFO L87 Difference]: Start difference. First operand 15759 states and 18917 transitions. Second operand 4 states. [2018-10-24 16:35:27,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:27,643 INFO L93 Difference]: Finished difference Result 31518 states and 37839 transitions. [2018-10-24 16:35:27,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 16:35:27,649 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2018-10-24 16:35:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:27,677 INFO L225 Difference]: With dead ends: 31518 [2018-10-24 16:35:27,678 INFO L226 Difference]: Without dead ends: 15761 [2018-10-24 16:35:27,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 3 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 16:35:27,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15761 states. [2018-10-24 16:35:27,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15761 to 15757. [2018-10-24 16:35:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15757 states. [2018-10-24 16:35:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15757 states to 15757 states and 18094 transitions. [2018-10-24 16:35:27,892 INFO L78 Accepts]: Start accepts. Automaton has 15757 states and 18094 transitions. Word has length 497 [2018-10-24 16:35:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:27,893 INFO L481 AbstractCegarLoop]: Abstraction has 15757 states and 18094 transitions. [2018-10-24 16:35:27,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 16:35:27,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15757 states and 18094 transitions. [2018-10-24 16:35:27,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 522 [2018-10-24 16:35:27,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:27,912 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-24 16:35:27,912 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:27,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash 184151181, now seen corresponding path program 1 times [2018-10-24 16:35:27,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:27,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:27,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:27,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:28,663 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2018-10-24 16:35:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 544 proven. 4 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2018-10-24 16:35:29,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:35:29,398 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 16:35:29,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:29,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:35:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 596 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2018-10-24 16:35:29,832 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:35:29,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2018-10-24 16:35:29,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 16:35:29,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 16:35:29,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-10-24 16:35:29,834 INFO L87 Difference]: Start difference. First operand 15757 states and 18094 transitions. Second operand 8 states. [2018-10-24 16:35:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:38,490 INFO L93 Difference]: Finished difference Result 35882 states and 40871 transitions. [2018-10-24 16:35:38,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:35:38,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 521 [2018-10-24 16:35:38,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:38,516 INFO L225 Difference]: With dead ends: 35882 [2018-10-24 16:35:38,516 INFO L226 Difference]: Without dead ends: 16052 [2018-10-24 16:35:38,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 524 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:35:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16052 states. [2018-10-24 16:35:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16052 to 15752. [2018-10-24 16:35:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2018-10-24 16:35:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 17369 transitions. [2018-10-24 16:35:38,697 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 17369 transitions. Word has length 521 [2018-10-24 16:35:38,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:38,697 INFO L481 AbstractCegarLoop]: Abstraction has 15752 states and 17369 transitions. [2018-10-24 16:35:38,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 16:35:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 17369 transitions. [2018-10-24 16:35:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2018-10-24 16:35:38,712 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:38,713 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:35:38,713 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:38,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:38,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1576955369, now seen corresponding path program 1 times [2018-10-24 16:35:38,714 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:38,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:38,716 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:38,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:39,261 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-24 16:35:39,865 WARN L179 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-10-24 16:35:40,664 WARN L179 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2018-10-24 16:35:41,402 WARN L179 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2018-10-24 16:35:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 274 proven. 136 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-10-24 16:35:41,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:35:41,756 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 16:35:41,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:41,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:35:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-10-24 16:35:42,146 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:35:42,147 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2018-10-24 16:35:42,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 16:35:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 16:35:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-24 16:35:42,149 INFO L87 Difference]: Start difference. First operand 15752 states and 17369 transitions. Second operand 9 states. [2018-10-24 16:35:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:52,542 INFO L93 Difference]: Finished difference Result 31968 states and 35207 transitions. [2018-10-24 16:35:52,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 16:35:52,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 522 [2018-10-24 16:35:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:52,570 INFO L225 Difference]: With dead ends: 31968 [2018-10-24 16:35:52,570 INFO L226 Difference]: Without dead ends: 16218 [2018-10-24 16:35:52,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 526 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2018-10-24 16:35:52,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16218 states. [2018-10-24 16:35:52,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16218 to 15748. [2018-10-24 16:35:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15748 states. [2018-10-24 16:35:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15748 states to 15748 states and 16802 transitions. [2018-10-24 16:35:52,760 INFO L78 Accepts]: Start accepts. Automaton has 15748 states and 16802 transitions. Word has length 522 [2018-10-24 16:35:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:52,761 INFO L481 AbstractCegarLoop]: Abstraction has 15748 states and 16802 transitions. [2018-10-24 16:35:52,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 16:35:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 15748 states and 16802 transitions. [2018-10-24 16:35:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2018-10-24 16:35:52,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:52,775 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-24 16:35:52,776 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:52,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:52,776 INFO L82 PathProgramCache]: Analyzing trace with hash -827615782, now seen corresponding path program 1 times [2018-10-24 16:35:52,776 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:52,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:52,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:52,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:52,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:53,419 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2018-10-24 16:35:53,420 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:53,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 16:35:53,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 16:35:53,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 16:35:53,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 16:35:53,421 INFO L87 Difference]: Start difference. First operand 15748 states and 16802 transitions. Second operand 3 states. [2018-10-24 16:35:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:35:56,738 INFO L93 Difference]: Finished difference Result 37806 states and 40578 transitions. [2018-10-24 16:35:56,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:35:56,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 646 [2018-10-24 16:35:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:35:56,764 INFO L225 Difference]: With dead ends: 37806 [2018-10-24 16:35:56,764 INFO L226 Difference]: Without dead ends: 22060 [2018-10-24 16:35:56,775 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 16:35:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22060 states. [2018-10-24 16:35:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22060 to 22050. [2018-10-24 16:35:56,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22050 states. [2018-10-24 16:35:57,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22050 states to 22050 states and 23457 transitions. [2018-10-24 16:35:57,015 INFO L78 Accepts]: Start accepts. Automaton has 22050 states and 23457 transitions. Word has length 646 [2018-10-24 16:35:57,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:35:57,016 INFO L481 AbstractCegarLoop]: Abstraction has 22050 states and 23457 transitions. [2018-10-24 16:35:57,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 16:35:57,016 INFO L276 IsEmpty]: Start isEmpty. Operand 22050 states and 23457 transitions. [2018-10-24 16:35:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2018-10-24 16:35:57,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:35:57,037 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:35:57,037 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:35:57,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:35:57,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2126414506, now seen corresponding path program 1 times [2018-10-24 16:35:57,038 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:35:57,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:35:57,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:57,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:35:57,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:35:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:35:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 461 trivial. 0 not checked. [2018-10-24 16:35:57,640 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 16:35:57,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 16:35:57,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 16:35:57,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 16:35:57,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:35:57,642 INFO L87 Difference]: Start difference. First operand 22050 states and 23457 transitions. Second operand 5 states. [2018-10-24 16:36:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 16:36:03,537 INFO L93 Difference]: Finished difference Result 59420 states and 63256 transitions. [2018-10-24 16:36:03,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 16:36:03,537 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 692 [2018-10-24 16:36:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 16:36:03,575 INFO L225 Difference]: With dead ends: 59420 [2018-10-24 16:36:03,575 INFO L226 Difference]: Without dead ends: 37372 [2018-10-24 16:36:03,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 16:36:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37372 states. [2018-10-24 16:36:04,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37372 to 28947. [2018-10-24 16:36:04,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28947 states. [2018-10-24 16:36:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28947 states to 28947 states and 30573 transitions. [2018-10-24 16:36:04,125 INFO L78 Accepts]: Start accepts. Automaton has 28947 states and 30573 transitions. Word has length 692 [2018-10-24 16:36:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 16:36:04,125 INFO L481 AbstractCegarLoop]: Abstraction has 28947 states and 30573 transitions. [2018-10-24 16:36:04,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 16:36:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 28947 states and 30573 transitions. [2018-10-24 16:36:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2018-10-24 16:36:04,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 16:36:04,146 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-24 16:36:04,147 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 16:36:04,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 16:36:04,147 INFO L82 PathProgramCache]: Analyzing trace with hash 386069199, now seen corresponding path program 1 times [2018-10-24 16:36:04,147 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 16:36:04,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 16:36:04,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:36:04,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:36:04,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 16:36:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:36:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 424 proven. 306 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2018-10-24 16:36:05,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 16:36:05,261 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 16:36:05,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 16:36:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 16:36:05,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 16:36:05,910 WARN L179 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 13 [2018-10-24 16:36:14,331 WARN L179 SmtUtils]: Spent 6.09 s on a formula simplification that was a NOOP. DAG size: 58 [2018-10-24 16:36:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 486 proven. 0 refuted. 0 times theorem prover too weak. 413 trivial. 0 not checked. [2018-10-24 16:36:15,985 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 16:36:15,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2018-10-24 16:36:15,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 16:36:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 16:36:15,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2018-10-24 16:36:15,987 INFO L87 Difference]: Start difference. First operand 28947 states and 30573 transitions. Second operand 7 states. Received shutdown request... [2018-10-24 16:38:25,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 16:38:25,132 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 16:38:25,137 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 16:38:25,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 04:38:25 BoogieIcfgContainer [2018-10-24 16:38:25,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 16:38:25,138 INFO L168 Benchmark]: Toolchain (without parser) took 253339.35 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -856.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-10-24 16:38:25,140 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 16:38:25,140 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1318.34 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:38:25,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 429.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -869.7 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2018-10-24 16:38:25,142 INFO L168 Benchmark]: Boogie Preprocessor took 202.57 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. [2018-10-24 16:38:25,144 INFO L168 Benchmark]: RCFGBuilder took 8432.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 318.7 MB). Peak memory consumption was 318.7 MB. Max. memory is 7.1 GB. [2018-10-24 16:38:25,145 INFO L168 Benchmark]: TraceAbstraction took 242951.44 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 1.8 GB in the beginning and 2.3 GB in the end (delta: -438.5 MB). Peak memory consumption was 747.9 MB. Max. memory is 7.1 GB. [2018-10-24 16:38:25,152 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1318.34 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: 105.7 MB). Peak memory consumption was 105.7 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 429.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.9 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -869.7 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 202.57 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8432.08 ms. Allocated memory is still 2.3 GB. Free memory was 2.1 GB in the beginning and 1.8 GB in the end (delta: 318.7 MB). Peak memory consumption was 318.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242951.44 ms. Allocated memory was 2.3 GB in the beginning and 3.5 GB in the end (delta: 1.2 GB). Free memory was 1.8 GB in the beginning and 2.3 GB in the end (delta: -438.5 MB). Peak memory consumption was 747.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 196]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 196). Cancelled while BasicCegarLoop was constructing difference of abstraction (28947states) and FLOYD_HOARE automaton (currently 3 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (76 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 425 locations, 1 error locations. TIMEOUT Result, 242.8s OverallTime, 12 OverallIterations, 5 TraceHistogramMax, 218.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3645 SDtfs, 13144 SDslu, 1958 SDs, 0 SdLazy, 26612 SolverSat, 5001 SolverUnsat, 70 SolverUnknown, 0 SolverNotchecked, 207.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2075 GetRequests, 2018 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 13.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28947occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 15298 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 17.9s InterpolantComputationTime, 6916 NumberOfCodeBlocks, 6916 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 6900 ConstructedInterpolants, 142 QuantifiedInterpolants, 17704446 SizeOfPredicates, 1 NumberOfNonLiveVariables, 2456 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 16 InterpolantComputations, 12 PerfectInterpolantSequences, 6557/7007 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown