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/Problem11_label45_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 20:03:43,921 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 20:03:43,923 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 20:03:43,935 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 20:03:43,935 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 20:03:43,936 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 20:03:43,937 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 20:03:43,939 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 20:03:43,941 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 20:03:43,942 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 20:03:43,943 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 20:03:43,944 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 20:03:43,945 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 20:03:43,946 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 20:03:43,947 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 20:03:43,948 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 20:03:43,949 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 20:03:43,951 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 20:03:43,953 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 20:03:43,955 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 20:03:43,956 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 20:03:43,957 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 20:03:43,960 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 20:03:43,974 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 20:03:44,004 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 20:03:44,004 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 20:03:44,005 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 20:03:44,005 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 20:03:44,005 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 20:03:44,006 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 20:03:44,007 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 20:03:44,007 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 20:03:44,007 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 20:03:44,007 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 20:03:44,008 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 20:03:44,008 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 20:03:44,008 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 20:03:44,008 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 20:03:44,008 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 20:03:44,009 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 20:03:44,010 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 20:03:44,010 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 20:03:44,010 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 20:03:44,010 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:03:44,011 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 20:03:44,011 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 20:03:44,011 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 20:03:44,011 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 20:03:44,011 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 20:03:44,011 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 20:03:44,012 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 20:03:44,012 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 20:03:44,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 20:03:44,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 20:03:44,083 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 20:03:44,084 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 20:03:44,085 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 20:03:44,086 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label45_true-unreach-call.c [2018-10-23 20:03:44,157 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/735e8510a/3d86fab0e91d422b9614eb7d66295db5/FLAG6fa709041 [2018-10-23 20:03:44,751 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 20:03:44,752 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label45_true-unreach-call.c [2018-10-23 20:03:44,768 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/735e8510a/3d86fab0e91d422b9614eb7d66295db5/FLAG6fa709041 [2018-10-23 20:03:44,787 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/735e8510a/3d86fab0e91d422b9614eb7d66295db5 [2018-10-23 20:03:44,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 20:03:44,800 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 20:03:44,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 20:03:44,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 20:03:44,805 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 20:03:44,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:03:44" (1/1) ... [2018-10-23 20:03:44,809 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21d48a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:44, skipping insertion in model container [2018-10-23 20:03:44,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:03:44" (1/1) ... [2018-10-23 20:03:44,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 20:03:44,904 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 20:03:45,492 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:03:45,499 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 20:03:45,673 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 20:03:45,695 INFO L193 MainTranslator]: Completed translation [2018-10-23 20:03:45,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45 WrapperNode [2018-10-23 20:03:45,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 20:03:45,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 20:03:45,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 20:03:45,697 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 20:03:45,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:45,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:45,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 20:03:45,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 20:03:45,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 20:03:45,975 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 20:03:45,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:45,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:45,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:46,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:46,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:46,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:46,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... [2018-10-23 20:03:46,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 20:03:46,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 20:03:46,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 20:03:46,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 20:03:46,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 20:03:46,185 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 20:03:46,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 20:03:46,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 20:03:51,179 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 20:03:51,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:03:51 BoogieIcfgContainer [2018-10-23 20:03:51,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 20:03:51,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 20:03:51,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 20:03:51,187 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 20:03:51,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:03:44" (1/3) ... [2018-10-23 20:03:51,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af10f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:03:51, skipping insertion in model container [2018-10-23 20:03:51,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:03:45" (2/3) ... [2018-10-23 20:03:51,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af10f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:03:51, skipping insertion in model container [2018-10-23 20:03:51,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:03:51" (3/3) ... [2018-10-23 20:03:51,193 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem11_label45_true-unreach-call.c [2018-10-23 20:03:51,203 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 20:03:51,212 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 20:03:51,230 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 20:03:51,268 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 20:03:51,269 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 20:03:51,269 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 20:03:51,269 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 20:03:51,269 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 20:03:51,269 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 20:03:51,270 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 20:03:51,270 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 20:03:51,270 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 20:03:51,296 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states. [2018-10-23 20:03:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 20:03:51,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:03:51,306 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:03:51,309 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:03:51,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:03:51,315 INFO L82 PathProgramCache]: Analyzing trace with hash 575043410, now seen corresponding path program 1 times [2018-10-23 20:03:51,318 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:03:51,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:03:51,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:03:51,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:03:51,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:03:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:03:51,735 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-23 20:03:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:03:51,748 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:03:51,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:03:51,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:03:51,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:03:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:03:51,768 INFO L87 Difference]: Start difference. First operand 284 states. Second operand 4 states. [2018-10-23 20:03:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:03:55,143 INFO L93 Difference]: Finished difference Result 972 states and 1744 transitions. [2018-10-23 20:03:55,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:03:55,145 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-10-23 20:03:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:03:55,173 INFO L225 Difference]: With dead ends: 972 [2018-10-23 20:03:55,173 INFO L226 Difference]: Without dead ends: 681 [2018-10-23 20:03:55,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:03:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2018-10-23 20:03:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 469. [2018-10-23 20:03:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2018-10-23 20:03:55,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 728 transitions. [2018-10-23 20:03:55,262 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 728 transitions. Word has length 33 [2018-10-23 20:03:55,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:03:55,263 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 728 transitions. [2018-10-23 20:03:55,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:03:55,263 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 728 transitions. [2018-10-23 20:03:55,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-23 20:03:55,268 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:03:55,268 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:03:55,269 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:03:55,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:03:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash -294278150, now seen corresponding path program 1 times [2018-10-23 20:03:55,270 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:03:55,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:03:55,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:03:55,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:03:55,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:03:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:03:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:03:55,555 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:03:55,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:03:55,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:03:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:03:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:03:55,559 INFO L87 Difference]: Start difference. First operand 469 states and 728 transitions. Second operand 4 states. [2018-10-23 20:03:59,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:03:59,526 INFO L93 Difference]: Finished difference Result 1695 states and 2717 transitions. [2018-10-23 20:03:59,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:03:59,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2018-10-23 20:03:59,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:03:59,535 INFO L225 Difference]: With dead ends: 1695 [2018-10-23 20:03:59,536 INFO L226 Difference]: Without dead ends: 1228 [2018-10-23 20:03:59,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:03:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2018-10-23 20:03:59,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1214. [2018-10-23 20:03:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1214 states. [2018-10-23 20:03:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1784 transitions. [2018-10-23 20:03:59,600 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1784 transitions. Word has length 102 [2018-10-23 20:03:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:03:59,605 INFO L481 AbstractCegarLoop]: Abstraction has 1214 states and 1784 transitions. [2018-10-23 20:03:59,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:03:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1784 transitions. [2018-10-23 20:03:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-23 20:03:59,612 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:03:59,612 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:03:59,612 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:03:59,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:03:59,615 INFO L82 PathProgramCache]: Analyzing trace with hash -263297828, now seen corresponding path program 1 times [2018-10-23 20:03:59,615 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:03:59,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:03:59,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:03:59,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:03:59,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:03:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:03:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:03:59,819 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:03:59,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:03:59,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:03:59,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:03:59,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:03:59,820 INFO L87 Difference]: Start difference. First operand 1214 states and 1784 transitions. Second operand 4 states. [2018-10-23 20:04:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:04,066 INFO L93 Difference]: Finished difference Result 4657 states and 6912 transitions. [2018-10-23 20:04:04,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:04:04,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2018-10-23 20:04:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:04,084 INFO L225 Difference]: With dead ends: 4657 [2018-10-23 20:04:04,084 INFO L226 Difference]: Without dead ends: 3445 [2018-10-23 20:04:04,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2018-10-23 20:04:04,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 3445. [2018-10-23 20:04:04,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3445 states. [2018-10-23 20:04:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4375 transitions. [2018-10-23 20:04:04,152 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4375 transitions. Word has length 105 [2018-10-23 20:04:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:04,152 INFO L481 AbstractCegarLoop]: Abstraction has 3445 states and 4375 transitions. [2018-10-23 20:04:04,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:04:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4375 transitions. [2018-10-23 20:04:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-10-23 20:04:04,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:04,157 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:04:04,157 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:04,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 316350140, now seen corresponding path program 1 times [2018-10-23 20:04:04,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:04,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:04,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:04,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:04,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:04:04,439 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:04,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:04:04,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:04:04,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:04:04,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:04:04,441 INFO L87 Difference]: Start difference. First operand 3445 states and 4375 transitions. Second operand 5 states. [2018-10-23 20:04:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:09,062 INFO L93 Difference]: Finished difference Result 10825 states and 14157 transitions. [2018-10-23 20:04:09,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:04:09,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2018-10-23 20:04:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:09,096 INFO L225 Difference]: With dead ends: 10825 [2018-10-23 20:04:09,096 INFO L226 Difference]: Without dead ends: 7567 [2018-10-23 20:04:09,101 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 [2018-10-23 20:04:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2018-10-23 20:04:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 7566. [2018-10-23 20:04:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7566 states. [2018-10-23 20:04:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7566 states to 7566 states and 9466 transitions. [2018-10-23 20:04:09,234 INFO L78 Accepts]: Start accepts. Automaton has 7566 states and 9466 transitions. Word has length 161 [2018-10-23 20:04:09,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:09,235 INFO L481 AbstractCegarLoop]: Abstraction has 7566 states and 9466 transitions. [2018-10-23 20:04:09,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:04:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 7566 states and 9466 transitions. [2018-10-23 20:04:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-23 20:04:09,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:09,241 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:04:09,241 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:09,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:09,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2090882901, now seen corresponding path program 1 times [2018-10-23 20:04:09,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:09,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:09,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:09,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:09,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:09,652 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2018-10-23 20:04:09,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:09,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:04:09,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:04:09,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:04:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:09,654 INFO L87 Difference]: Start difference. First operand 7566 states and 9466 transitions. Second operand 4 states. [2018-10-23 20:04:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:12,211 INFO L93 Difference]: Finished difference Result 14971 states and 18789 transitions. [2018-10-23 20:04:12,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:04:12,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2018-10-23 20:04:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:12,248 INFO L225 Difference]: With dead ends: 14971 [2018-10-23 20:04:12,248 INFO L226 Difference]: Without dead ends: 7592 [2018-10-23 20:04:12,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:12,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2018-10-23 20:04:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 7565. [2018-10-23 20:04:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7565 states. [2018-10-23 20:04:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7565 states to 7565 states and 8984 transitions. [2018-10-23 20:04:12,376 INFO L78 Accepts]: Start accepts. Automaton has 7565 states and 8984 transitions. Word has length 228 [2018-10-23 20:04:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:12,377 INFO L481 AbstractCegarLoop]: Abstraction has 7565 states and 8984 transitions. [2018-10-23 20:04:12,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:04:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 7565 states and 8984 transitions. [2018-10-23 20:04:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2018-10-23 20:04:12,382 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:12,382 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:04:12,382 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:12,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:12,383 INFO L82 PathProgramCache]: Analyzing trace with hash -506625732, now seen corresponding path program 1 times [2018-10-23 20:04:12,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:12,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:12,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:12,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:12,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:12,692 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 20:04:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:04:12,773 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:12,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:04:12,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:04:12,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:04:12,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:12,775 INFO L87 Difference]: Start difference. First operand 7565 states and 8984 transitions. Second operand 4 states. [2018-10-23 20:04:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:14,858 INFO L93 Difference]: Finished difference Result 19035 states and 23078 transitions. [2018-10-23 20:04:14,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:04:14,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2018-10-23 20:04:14,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:14,899 INFO L225 Difference]: With dead ends: 19035 [2018-10-23 20:04:14,899 INFO L226 Difference]: Without dead ends: 11657 [2018-10-23 20:04:14,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:14,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2018-10-23 20:04:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 11080. [2018-10-23 20:04:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11080 states. [2018-10-23 20:04:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11080 states to 11080 states and 13221 transitions. [2018-10-23 20:04:15,232 INFO L78 Accepts]: Start accepts. Automaton has 11080 states and 13221 transitions. Word has length 229 [2018-10-23 20:04:15,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:15,232 INFO L481 AbstractCegarLoop]: Abstraction has 11080 states and 13221 transitions. [2018-10-23 20:04:15,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:04:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 11080 states and 13221 transitions. [2018-10-23 20:04:15,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-23 20:04:15,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:15,244 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:04:15,244 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:15,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1732908421, now seen corresponding path program 1 times [2018-10-23 20:04:15,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:15,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:15,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:15,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:15,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2018-10-23 20:04:15,478 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:15,478 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:04:15,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:04:15,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:04:15,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:04:15,480 INFO L87 Difference]: Start difference. First operand 11080 states and 13221 transitions. Second operand 3 states. [2018-10-23 20:04:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:16,621 INFO L93 Difference]: Finished difference Result 25300 states and 30301 transitions. [2018-10-23 20:04:16,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:04:16,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 285 [2018-10-23 20:04:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:16,646 INFO L225 Difference]: With dead ends: 25300 [2018-10-23 20:04:16,646 INFO L226 Difference]: Without dead ends: 13654 [2018-10-23 20:04:16,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:04:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13654 states. [2018-10-23 20:04:16,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13654 to 13282. [2018-10-23 20:04:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13282 states. [2018-10-23 20:04:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 15179 transitions. [2018-10-23 20:04:16,824 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 15179 transitions. Word has length 285 [2018-10-23 20:04:16,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:16,824 INFO L481 AbstractCegarLoop]: Abstraction has 13282 states and 15179 transitions. [2018-10-23 20:04:16,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:04:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 15179 transitions. [2018-10-23 20:04:16,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-23 20:04:16,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:16,840 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:04:16,840 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:16,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:16,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1591903917, now seen corresponding path program 1 times [2018-10-23 20:04:16,841 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:16,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:16,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:16,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:16,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2018-10-23 20:04:17,169 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:17,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 20:04:17,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 20:04:17,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 20:04:17,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:04:17,170 INFO L87 Difference]: Start difference. First operand 13282 states and 15179 transitions. Second operand 3 states. [2018-10-23 20:04:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:18,636 INFO L93 Difference]: Finished difference Result 27314 states and 31303 transitions. [2018-10-23 20:04:18,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 20:04:18,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2018-10-23 20:04:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:18,659 INFO L225 Difference]: With dead ends: 27314 [2018-10-23 20:04:18,659 INFO L226 Difference]: Without dead ends: 12720 [2018-10-23 20:04:18,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 20:04:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12720 states. [2018-10-23 20:04:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12720 to 12345. [2018-10-23 20:04:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12345 states. [2018-10-23 20:04:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12345 states to 12345 states and 13968 transitions. [2018-10-23 20:04:18,827 INFO L78 Accepts]: Start accepts. Automaton has 12345 states and 13968 transitions. Word has length 328 [2018-10-23 20:04:18,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:18,827 INFO L481 AbstractCegarLoop]: Abstraction has 12345 states and 13968 transitions. [2018-10-23 20:04:18,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 20:04:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 12345 states and 13968 transitions. [2018-10-23 20:04:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2018-10-23 20:04:18,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:18,841 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:04:18,841 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:18,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:18,842 INFO L82 PathProgramCache]: Analyzing trace with hash 326232789, now seen corresponding path program 1 times [2018-10-23 20:04:18,842 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:18,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:18,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:18,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:18,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:04:19,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:04:19,867 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:04:19,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:19,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:20,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:04:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 61 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:04:20,722 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:04:20,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-10-23 20:04:20,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:04:20,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:04:20,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:04:20,728 INFO L87 Difference]: Start difference. First operand 12345 states and 13968 transitions. Second operand 9 states. [2018-10-23 20:04:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:28,634 INFO L93 Difference]: Finished difference Result 38270 states and 43536 transitions. [2018-10-23 20:04:28,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 20:04:28,635 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 333 [2018-10-23 20:04:28,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:28,678 INFO L225 Difference]: With dead ends: 38270 [2018-10-23 20:04:28,678 INFO L226 Difference]: Without dead ends: 27043 [2018-10-23 20:04:28,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:04:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27043 states. [2018-10-23 20:04:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27043 to 21838. [2018-10-23 20:04:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21838 states. [2018-10-23 20:04:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21838 states to 21838 states and 24508 transitions. [2018-10-23 20:04:29,282 INFO L78 Accepts]: Start accepts. Automaton has 21838 states and 24508 transitions. Word has length 333 [2018-10-23 20:04:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:29,283 INFO L481 AbstractCegarLoop]: Abstraction has 21838 states and 24508 transitions. [2018-10-23 20:04:29,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:04:29,283 INFO L276 IsEmpty]: Start isEmpty. Operand 21838 states and 24508 transitions. [2018-10-23 20:04:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2018-10-23 20:04:29,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:29,301 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:04:29,301 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:29,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:29,302 INFO L82 PathProgramCache]: Analyzing trace with hash -249180895, now seen corresponding path program 1 times [2018-10-23 20:04:29,302 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:29,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:29,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:29,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:29,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:29,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 328 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:04:29,883 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:29,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:04:29,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:04:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:04:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:04:29,884 INFO L87 Difference]: Start difference. First operand 21838 states and 24508 transitions. Second operand 5 states. [2018-10-23 20:04:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:34,357 INFO L93 Difference]: Finished difference Result 55730 states and 62701 transitions. [2018-10-23 20:04:34,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:04:34,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 341 [2018-10-23 20:04:34,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:34,400 INFO L225 Difference]: With dead ends: 55730 [2018-10-23 20:04:34,400 INFO L226 Difference]: Without dead ends: 34079 [2018-10-23 20:04:34,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:04:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34079 states. [2018-10-23 20:04:34,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34079 to 31658. [2018-10-23 20:04:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31658 states. [2018-10-23 20:04:34,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31658 states to 31658 states and 34860 transitions. [2018-10-23 20:04:34,843 INFO L78 Accepts]: Start accepts. Automaton has 31658 states and 34860 transitions. Word has length 341 [2018-10-23 20:04:34,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:34,844 INFO L481 AbstractCegarLoop]: Abstraction has 31658 states and 34860 transitions. [2018-10-23 20:04:34,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:04:34,844 INFO L276 IsEmpty]: Start isEmpty. Operand 31658 states and 34860 transitions. [2018-10-23 20:04:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-23 20:04:34,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:34,863 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:04:34,863 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:34,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:34,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1530952089, now seen corresponding path program 1 times [2018-10-23 20:04:34,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:34,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:34,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:34,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:34,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:35,723 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-10-23 20:04:36,179 WARN L179 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-10-23 20:04:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 242 proven. 106 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:04:36,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:04:36,425 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:04:36,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:36,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:04:37,193 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 20:04:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2018-10-23 20:04:37,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:04:37,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-23 20:04:37,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 20:04:37,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 20:04:37,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-23 20:04:37,631 INFO L87 Difference]: Start difference. First operand 31658 states and 34860 transitions. Second operand 9 states. [2018-10-23 20:04:37,909 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 20:04:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:49,122 INFO L93 Difference]: Finished difference Result 72597 states and 79705 transitions. [2018-10-23 20:04:49,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 20:04:49,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 344 [2018-10-23 20:04:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:49,158 INFO L225 Difference]: With dead ends: 72597 [2018-10-23 20:04:49,158 INFO L226 Difference]: Without dead ends: 34406 [2018-10-23 20:04:49,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-10-23 20:04:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34406 states. [2018-10-23 20:04:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34406 to 32364. [2018-10-23 20:04:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32364 states. [2018-10-23 20:04:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32364 states to 32364 states and 35297 transitions. [2018-10-23 20:04:49,571 INFO L78 Accepts]: Start accepts. Automaton has 32364 states and 35297 transitions. Word has length 344 [2018-10-23 20:04:49,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:49,572 INFO L481 AbstractCegarLoop]: Abstraction has 32364 states and 35297 transitions. [2018-10-23 20:04:49,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 20:04:49,572 INFO L276 IsEmpty]: Start isEmpty. Operand 32364 states and 35297 transitions. [2018-10-23 20:04:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2018-10-23 20:04:49,587 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:49,587 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:04:49,588 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:49,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1571378605, now seen corresponding path program 1 times [2018-10-23 20:04:49,588 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:49,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:49,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:49,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:49,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:50,122 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-10-23 20:04:50,255 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:04:50,255 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:04:50,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:04:50,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:04:50,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:04:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:50,257 INFO L87 Difference]: Start difference. First operand 32364 states and 35297 transitions. Second operand 4 states. [2018-10-23 20:04:52,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:52,260 INFO L93 Difference]: Finished difference Result 60855 states and 66434 transitions. [2018-10-23 20:04:52,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:04:52,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 359 [2018-10-23 20:04:52,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:52,297 INFO L225 Difference]: With dead ends: 60855 [2018-10-23 20:04:52,297 INFO L226 Difference]: Without dead ends: 36118 [2018-10-23 20:04:52,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:04:52,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36118 states. [2018-10-23 20:04:52,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36118 to 32931. [2018-10-23 20:04:52,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32931 states. [2018-10-23 20:04:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32931 states to 32931 states and 35800 transitions. [2018-10-23 20:04:52,706 INFO L78 Accepts]: Start accepts. Automaton has 32931 states and 35800 transitions. Word has length 359 [2018-10-23 20:04:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:52,706 INFO L481 AbstractCegarLoop]: Abstraction has 32931 states and 35800 transitions. [2018-10-23 20:04:52,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:04:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32931 states and 35800 transitions. [2018-10-23 20:04:52,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2018-10-23 20:04:52,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:52,728 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:04:52,728 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:52,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash -711972748, now seen corresponding path program 1 times [2018-10-23 20:04:52,729 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:52,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:52,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:52,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:52,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:53,288 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 6 DAG size of output: 3 [2018-10-23 20:04:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 290 proven. 103 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:04:53,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:04:53,409 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:04:53,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:53,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:04:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 290 proven. 103 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:04:54,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:04:54,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-23 20:04:54,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:04:54,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:04:54,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:04:54,026 INFO L87 Difference]: Start difference. First operand 32931 states and 35800 transitions. Second operand 5 states. [2018-10-23 20:04:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:04:56,760 INFO L93 Difference]: Finished difference Result 64186 states and 69600 transitions. [2018-10-23 20:04:56,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:04:56,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2018-10-23 20:04:56,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:04:56,790 INFO L225 Difference]: With dead ends: 64186 [2018-10-23 20:04:56,791 INFO L226 Difference]: Without dead ends: 34596 [2018-10-23 20:04:56,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 407 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 20:04:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34596 states. [2018-10-23 20:04:57,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34596 to 29940. [2018-10-23 20:04:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29940 states. [2018-10-23 20:04:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29940 states to 29940 states and 32206 transitions. [2018-10-23 20:04:57,093 INFO L78 Accepts]: Start accepts. Automaton has 29940 states and 32206 transitions. Word has length 409 [2018-10-23 20:04:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:04:57,093 INFO L481 AbstractCegarLoop]: Abstraction has 29940 states and 32206 transitions. [2018-10-23 20:04:57,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:04:57,094 INFO L276 IsEmpty]: Start isEmpty. Operand 29940 states and 32206 transitions. [2018-10-23 20:04:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2018-10-23 20:04:57,111 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:04:57,112 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-23 20:04:57,112 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:04:57,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:04:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1562337051, now seen corresponding path program 1 times [2018-10-23 20:04:57,113 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:04:57,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:04:57,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:57,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:57,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:04:57,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:57,812 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 556 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2018-10-23 20:04:57,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:04:57,812 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:04:57,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:04:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:04:57,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:04:58,332 WARN L179 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 43 [2018-10-23 20:05:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 354 proven. 31 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2018-10-23 20:05:01,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:05:01,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2018-10-23 20:05:01,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 20:05:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 20:05:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-10-23 20:05:01,557 INFO L87 Difference]: Start difference. First operand 29940 states and 32206 transitions. Second operand 8 states. [2018-10-23 20:05:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:15,092 INFO L93 Difference]: Finished difference Result 62126 states and 66894 transitions. [2018-10-23 20:05:15,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 20:05:15,092 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 419 [2018-10-23 20:05:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:15,135 INFO L225 Difference]: With dead ends: 62126 [2018-10-23 20:05:15,135 INFO L226 Difference]: Without dead ends: 35714 [2018-10-23 20:05:15,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 425 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-10-23 20:05:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35714 states. [2018-10-23 20:05:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35714 to 28446. [2018-10-23 20:05:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28446 states. [2018-10-23 20:05:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28446 states to 28446 states and 30583 transitions. [2018-10-23 20:05:15,486 INFO L78 Accepts]: Start accepts. Automaton has 28446 states and 30583 transitions. Word has length 419 [2018-10-23 20:05:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:15,486 INFO L481 AbstractCegarLoop]: Abstraction has 28446 states and 30583 transitions. [2018-10-23 20:05:15,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 20:05:15,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28446 states and 30583 transitions. [2018-10-23 20:05:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2018-10-23 20:05:15,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:15,501 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2018-10-23 20:05:15,502 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:15,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1889678859, now seen corresponding path program 1 times [2018-10-23 20:05:15,502 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:15,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:15,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:15,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:15,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:16,115 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-23 20:05:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 134 proven. 465 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-23 20:05:16,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:16,447 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:16,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:16,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:17,562 WARN L179 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 27 [2018-10-23 20:05:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 260 proven. 339 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-10-23 20:05:18,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:05:18,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2018-10-23 20:05:18,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:05:18,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:05:18,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:05:18,660 INFO L87 Difference]: Start difference. First operand 28446 states and 30583 transitions. Second operand 12 states. [2018-10-23 20:05:29,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:29,135 INFO L93 Difference]: Finished difference Result 55575 states and 59795 transitions. [2018-10-23 20:05:29,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 20:05:29,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 452 [2018-10-23 20:05:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:29,162 INFO L225 Difference]: With dead ends: 55575 [2018-10-23 20:05:29,162 INFO L226 Difference]: Without dead ends: 29176 [2018-10-23 20:05:29,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 447 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=160, Invalid=302, Unknown=0, NotChecked=0, Total=462 [2018-10-23 20:05:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29176 states. [2018-10-23 20:05:29,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29176 to 26451. [2018-10-23 20:05:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26451 states. [2018-10-23 20:05:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26451 states to 26451 states and 28311 transitions. [2018-10-23 20:05:29,445 INFO L78 Accepts]: Start accepts. Automaton has 26451 states and 28311 transitions. Word has length 452 [2018-10-23 20:05:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:29,446 INFO L481 AbstractCegarLoop]: Abstraction has 26451 states and 28311 transitions. [2018-10-23 20:05:29,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:05:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 26451 states and 28311 transitions. [2018-10-23 20:05:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2018-10-23 20:05:29,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:29,461 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:05:29,462 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:29,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:29,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1264069308, now seen corresponding path program 1 times [2018-10-23 20:05:29,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:29,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:29,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:29,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:29,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:29,943 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-10-23 20:05:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 463 proven. 162 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:05:30,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:30,591 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:30,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:30,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 467 proven. 158 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-10-23 20:05:31,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:05:31,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2018-10-23 20:05:31,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 20:05:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 20:05:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-23 20:05:31,143 INFO L87 Difference]: Start difference. First operand 26451 states and 28311 transitions. Second operand 10 states. [2018-10-23 20:05:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:40,466 INFO L93 Difference]: Finished difference Result 65854 states and 70449 transitions. [2018-10-23 20:05:40,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 20:05:40,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 508 [2018-10-23 20:05:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:40,505 INFO L225 Difference]: With dead ends: 65854 [2018-10-23 20:05:40,506 INFO L226 Difference]: Without dead ends: 41443 [2018-10-23 20:05:40,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 505 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2018-10-23 20:05:40,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41443 states. [2018-10-23 20:05:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41443 to 22551. [2018-10-23 20:05:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22551 states. [2018-10-23 20:05:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22551 states to 22551 states and 24146 transitions. [2018-10-23 20:05:41,053 INFO L78 Accepts]: Start accepts. Automaton has 22551 states and 24146 transitions. Word has length 508 [2018-10-23 20:05:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:05:41,053 INFO L481 AbstractCegarLoop]: Abstraction has 22551 states and 24146 transitions. [2018-10-23 20:05:41,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 20:05:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 22551 states and 24146 transitions. [2018-10-23 20:05:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2018-10-23 20:05:41,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:05:41,063 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 20:05:41,063 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:05:41,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:05:41,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1912565945, now seen corresponding path program 1 times [2018-10-23 20:05:41,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:05:41,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:05:41,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:41,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:41,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:05:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:41,518 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-23 20:05:41,700 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 20:05:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 92 proven. 319 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-23 20:05:42,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:05:42,537 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:05:42,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:05:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:05:42,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:05:43,074 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2018-10-23 20:05:43,747 WARN L179 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2018-10-23 20:05:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 562 backedges. 92 proven. 319 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2018-10-23 20:05:45,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:05:45,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2018-10-23 20:05:45,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:05:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:05:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:05:45,784 INFO L87 Difference]: Start difference. First operand 22551 states and 24146 transitions. Second operand 12 states. [2018-10-23 20:05:47,209 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2018-10-23 20:05:50,046 WARN L179 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2018-10-23 20:05:54,274 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2018-10-23 20:05:55,224 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2018-10-23 20:05:57,716 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2018-10-23 20:05:59,496 WARN L179 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2018-10-23 20:05:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:05:59,879 INFO L93 Difference]: Finished difference Result 46563 states and 49827 transitions. [2018-10-23 20:05:59,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-23 20:05:59,880 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 525 [2018-10-23 20:05:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:05:59,902 INFO L225 Difference]: With dead ends: 46563 [2018-10-23 20:05:59,902 INFO L226 Difference]: Without dead ends: 25681 [2018-10-23 20:05:59,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 512 SyntacticMatches, 11 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2018-10-23 20:05:59,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25681 states. [2018-10-23 20:06:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25681 to 20493. [2018-10-23 20:06:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20493 states. [2018-10-23 20:06:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20493 states to 20493 states and 21930 transitions. [2018-10-23 20:06:00,143 INFO L78 Accepts]: Start accepts. Automaton has 20493 states and 21930 transitions. Word has length 525 [2018-10-23 20:06:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:06:00,144 INFO L481 AbstractCegarLoop]: Abstraction has 20493 states and 21930 transitions. [2018-10-23 20:06:00,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 20:06:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20493 states and 21930 transitions. [2018-10-23 20:06:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-10-23 20:06:00,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:06:00,154 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:06:00,154 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:06:00,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:06:00,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1849402497, now seen corresponding path program 1 times [2018-10-23 20:06:00,155 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:06:00,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:06:00,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:00,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:00,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:00,801 WARN L179 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 20:06:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 839 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-10-23 20:06:01,009 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:06:01,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 20:06:01,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 20:06:01,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 20:06:01,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:06:01,011 INFO L87 Difference]: Start difference. First operand 20493 states and 21930 transitions. Second operand 4 states. [2018-10-23 20:06:03,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:06:03,361 INFO L93 Difference]: Finished difference Result 39878 states and 42722 transitions. [2018-10-23 20:06:03,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 20:06:03,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 543 [2018-10-23 20:06:03,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:06:03,378 INFO L225 Difference]: With dead ends: 39878 [2018-10-23 20:06:03,378 INFO L226 Difference]: Without dead ends: 21796 [2018-10-23 20:06:03,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 20:06:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21796 states. [2018-10-23 20:06:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21796 to 19935. [2018-10-23 20:06:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19935 states. [2018-10-23 20:06:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19935 states to 19935 states and 21189 transitions. [2018-10-23 20:06:03,565 INFO L78 Accepts]: Start accepts. Automaton has 19935 states and 21189 transitions. Word has length 543 [2018-10-23 20:06:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:06:03,566 INFO L481 AbstractCegarLoop]: Abstraction has 19935 states and 21189 transitions. [2018-10-23 20:06:03,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 20:06:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 19935 states and 21189 transitions. [2018-10-23 20:06:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2018-10-23 20:06:03,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:06:03,578 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2018-10-23 20:06:03,578 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:06:03,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:06:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 956786045, now seen corresponding path program 1 times [2018-10-23 20:06:03,578 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:06:03,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:06:03,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:03,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:03,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:04,050 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-23 20:06:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2018-10-23 20:06:04,193 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:06:04,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 20:06:04,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 20:06:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 20:06:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 20:06:04,194 INFO L87 Difference]: Start difference. First operand 19935 states and 21189 transitions. Second operand 5 states. [2018-10-23 20:06:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:06:06,768 INFO L93 Difference]: Finished difference Result 37090 states and 39456 transitions. [2018-10-23 20:06:06,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:06:06,768 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 554 [2018-10-23 20:06:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:06:06,783 INFO L225 Difference]: With dead ends: 37090 [2018-10-23 20:06:06,783 INFO L226 Difference]: Without dead ends: 19938 [2018-10-23 20:06:06,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:06:06,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19938 states. [2018-10-23 20:06:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19938 to 18825. [2018-10-23 20:06:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18825 states. [2018-10-23 20:06:06,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18825 states to 18825 states and 19965 transitions. [2018-10-23 20:06:06,957 INFO L78 Accepts]: Start accepts. Automaton has 18825 states and 19965 transitions. Word has length 554 [2018-10-23 20:06:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:06:06,957 INFO L481 AbstractCegarLoop]: Abstraction has 18825 states and 19965 transitions. [2018-10-23 20:06:06,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 20:06:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 18825 states and 19965 transitions. [2018-10-23 20:06:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 641 [2018-10-23 20:06:06,972 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:06:06,973 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:06:06,973 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:06:06,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:06:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash -847476356, now seen corresponding path program 1 times [2018-10-23 20:06:06,974 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:06:06,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:06:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:06,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:06,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 555 proven. 0 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2018-10-23 20:06:08,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:06:08,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 20:06:08,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:06:08,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:06:08,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:06:08,112 INFO L87 Difference]: Start difference. First operand 18825 states and 19965 transitions. Second operand 6 states. [2018-10-23 20:06:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:06:11,635 INFO L93 Difference]: Finished difference Result 43034 states and 45613 transitions. [2018-10-23 20:06:11,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:06:11,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 640 [2018-10-23 20:06:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:06:11,664 INFO L225 Difference]: With dead ends: 43034 [2018-10-23 20:06:11,665 INFO L226 Difference]: Without dead ends: 26992 [2018-10-23 20:06:11,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:06:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26992 states. [2018-10-23 20:06:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26992 to 18264. [2018-10-23 20:06:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18264 states. [2018-10-23 20:06:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18264 states to 18264 states and 19356 transitions. [2018-10-23 20:06:11,906 INFO L78 Accepts]: Start accepts. Automaton has 18264 states and 19356 transitions. Word has length 640 [2018-10-23 20:06:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:06:11,907 INFO L481 AbstractCegarLoop]: Abstraction has 18264 states and 19356 transitions. [2018-10-23 20:06:11,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:06:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 18264 states and 19356 transitions. [2018-10-23 20:06:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 648 [2018-10-23 20:06:11,918 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:06:11,918 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-23 20:06:11,918 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:06:11,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:06:11,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1534956161, now seen corresponding path program 1 times [2018-10-23 20:06:11,919 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:06:11,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:06:11,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:11,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:11,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1189 backedges. 595 proven. 0 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2018-10-23 20:06:12,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 20:06:12,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 20:06:12,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 20:06:12,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 20:06:12,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:06:12,792 INFO L87 Difference]: Start difference. First operand 18264 states and 19356 transitions. Second operand 6 states. [2018-10-23 20:06:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:06:16,171 INFO L93 Difference]: Finished difference Result 39864 states and 42236 transitions. [2018-10-23 20:06:16,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 20:06:16,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 647 [2018-10-23 20:06:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:06:16,192 INFO L225 Difference]: With dead ends: 39864 [2018-10-23 20:06:16,192 INFO L226 Difference]: Without dead ends: 24383 [2018-10-23 20:06:16,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 20:06:16,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24383 states. [2018-10-23 20:06:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24383 to 16774. [2018-10-23 20:06:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16774 states. [2018-10-23 20:06:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16774 states to 16774 states and 17788 transitions. [2018-10-23 20:06:16,396 INFO L78 Accepts]: Start accepts. Automaton has 16774 states and 17788 transitions. Word has length 647 [2018-10-23 20:06:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:06:16,397 INFO L481 AbstractCegarLoop]: Abstraction has 16774 states and 17788 transitions. [2018-10-23 20:06:16,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 20:06:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 16774 states and 17788 transitions. [2018-10-23 20:06:16,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2018-10-23 20:06:16,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:06:16,408 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:06:16,408 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:06:16,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:06:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash 725576367, now seen corresponding path program 1 times [2018-10-23 20:06:16,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:06:16,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:06:16,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:16,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:16,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:17,525 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 5 [2018-10-23 20:06:17,853 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 9 [2018-10-23 20:06:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 31 proven. 979 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:06:18,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:06:18,481 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:06:18,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:18,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:06:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 156 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:06:20,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:06:20,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2018-10-23 20:06:20,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 20:06:20,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 20:06:20,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-10-23 20:06:20,242 INFO L87 Difference]: Start difference. First operand 16774 states and 17788 transitions. Second operand 13 states. [2018-10-23 20:06:29,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 20:06:29,467 INFO L93 Difference]: Finished difference Result 45241 states and 47969 transitions. [2018-10-23 20:06:29,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 20:06:29,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 678 [2018-10-23 20:06:29,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 20:06:29,496 INFO L225 Difference]: With dead ends: 45241 [2018-10-23 20:06:29,497 INFO L226 Difference]: Without dead ends: 30880 [2018-10-23 20:06:29,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 672 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2018-10-23 20:06:29,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30880 states. [2018-10-23 20:06:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30880 to 19762. [2018-10-23 20:06:29,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19762 states. [2018-10-23 20:06:29,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19762 states to 19762 states and 20966 transitions. [2018-10-23 20:06:29,796 INFO L78 Accepts]: Start accepts. Automaton has 19762 states and 20966 transitions. Word has length 678 [2018-10-23 20:06:29,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 20:06:29,796 INFO L481 AbstractCegarLoop]: Abstraction has 19762 states and 20966 transitions. [2018-10-23 20:06:29,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 20:06:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 19762 states and 20966 transitions. [2018-10-23 20:06:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 687 [2018-10-23 20:06:29,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 20:06:29,809 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 20:06:29,810 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 20:06:29,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 20:06:29,810 INFO L82 PathProgramCache]: Analyzing trace with hash -817217683, now seen corresponding path program 1 times [2018-10-23 20:06:29,810 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 20:06:29,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 20:06:29,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:29,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:29,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 20:06:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 20:06:31,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 20:06:31,288 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 20:06:31,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 20:06:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 20:06:31,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 20:07:01,310 WARN L179 SmtUtils]: Spent 29.20 s on a formula simplification. DAG size of input: 646 DAG size of output: 192 [2018-10-23 20:07:03,502 WARN L179 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 45 [2018-10-23 20:07:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 683 proven. 201 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2018-10-23 20:07:12,051 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 20:07:12,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-23 20:07:12,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 20:07:12,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 20:07:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-23 20:07:12,053 INFO L87 Difference]: Start difference. First operand 19762 states and 20966 transitions. Second operand 12 states. Received shutdown request... [2018-10-23 20:07:35,908 WARN L187 SmtUtils]: Removed 4 from assertion stack [2018-10-23 20:07:35,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 20:07:35,908 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 20:07:35,912 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 20:07:35,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:07:35 BoogieIcfgContainer [2018-10-23 20:07:35,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 20:07:35,914 INFO L168 Benchmark]: Toolchain (without parser) took 231115.01 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 3.2 GB in the end (delta: -1.8 GB). Peak memory consumption was 805.8 MB. Max. memory is 7.1 GB. [2018-10-23 20:07:35,915 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. [2018-10-23 20:07:35,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 895.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. [2018-10-23 20:07:35,916 INFO L168 Benchmark]: Boogie Procedure Inliner took 277.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -849.7 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. [2018-10-23 20:07:35,917 INFO L168 Benchmark]: Boogie Preprocessor took 138.27 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 20:07:35,918 INFO L168 Benchmark]: RCFGBuilder took 5066.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 197.0 MB). Peak memory consumption was 197.0 MB. Max. memory is 7.1 GB. [2018-10-23 20:07:35,918 INFO L168 Benchmark]: TraceAbstraction took 224732.06 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 640.1 MB. Max. memory is 7.1 GB. [2018-10-23 20:07:35,923 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 895.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 63.4 MB). Peak memory consumption was 63.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 277.93 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 755.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -849.7 MB). Peak memory consumption was 24.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.27 ms. Allocated memory is still 2.3 GB. Free memory is still 2.2 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 5066.56 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 197.0 MB). Peak memory consumption was 197.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 224732.06 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.0 GB in the beginning and 3.2 GB in the end (delta: -1.2 GB). Peak memory consumption was 640.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 102). Cancelled while BasicCegarLoop was constructing difference of abstraction (19762states) and FLOYD_HOARE automaton (currently 5 states, 12 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 202. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 284 locations, 1 error locations. TIMEOUT Result, 224.6s OverallTime, 23 OverallIterations, 6 TraceHistogramMax, 145.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3664 SDtfs, 24263 SDslu, 3785 SDs, 0 SdLazy, 62457 SolverSat, 7806 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 100.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4549 GetRequests, 4343 SyntacticMatches, 32 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 49.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32931occurred in iteration=12, 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: 5.5s AutomataMinimizationTime, 22 MinimizatonAttempts, 83591 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 65.4s InterpolantComputationTime, 13263 NumberOfCodeBlocks, 13263 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 13231 ConstructedInterpolants, 658 QuantifiedInterpolants, 96834125 SizeOfPredicates, 20 NumberOfNonLiveVariables, 5611 ConjunctsInSsa, 88 ConjunctsInUnsatCore, 32 InterpolantComputations, 14 PerfectInterpolantSequences, 10516/16804 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown