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/Problem16_label05_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 18:18:12,328 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 18:18:12,330 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 18:18:12,345 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 18:18:12,346 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 18:18:12,347 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 18:18:12,348 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 18:18:12,350 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 18:18:12,352 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 18:18:12,352 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 18:18:12,353 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 18:18:12,354 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 18:18:12,355 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 18:18:12,356 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 18:18:12,357 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 18:18:12,357 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 18:18:12,358 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 18:18:12,360 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 18:18:12,362 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 18:18:12,364 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 18:18:12,367 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 18:18:12,370 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 18:18:12,372 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 18:18:12,373 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 18:18:12,373 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 18:18:12,374 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 18:18:12,375 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 18:18:12,375 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 18:18:12,376 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 18:18:12,377 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 18:18:12,377 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 18:18:12,378 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 18:18:12,380 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 18:18:12,397 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 18:18:12,398 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 18:18:12,399 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 18:18:12,399 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 18:18:12,399 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 18:18:12,400 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 18:18:12,400 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 18:18:12,400 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 18:18:12,400 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 18:18:12,400 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 18:18:12,401 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 18:18:12,401 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 18:18:12,401 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 18:18:12,401 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 18:18:12,401 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 18:18:12,402 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 18:18:12,402 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 18:18:12,402 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 18:18:12,402 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 18:18:12,402 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:18:12,403 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 18:18:12,403 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 18:18:12,403 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 18:18:12,403 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 18:18:12,403 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 18:18:12,404 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 18:18:12,404 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 18:18:12,404 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 18:18:12,447 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 18:18:12,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 18:18:12,465 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 18:18:12,466 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 18:18:12,467 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 18:18:12,468 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label05_false-unreach-call.c [2018-10-23 18:18:12,533 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d8146076a/cbb184a27250402a8f5cbb465d762bbf/FLAG1426065b2 [2018-10-23 18:18:13,182 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 18:18:13,183 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label05_false-unreach-call.c [2018-10-23 18:18:13,204 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d8146076a/cbb184a27250402a8f5cbb465d762bbf/FLAG1426065b2 [2018-10-23 18:18:13,224 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/d8146076a/cbb184a27250402a8f5cbb465d762bbf [2018-10-23 18:18:13,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 18:18:13,240 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 18:18:13,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 18:18:13,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 18:18:13,245 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 18:18:13,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:13" (1/1) ... [2018-10-23 18:18:13,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c5ece5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:13, skipping insertion in model container [2018-10-23 18:18:13,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:18:13" (1/1) ... [2018-10-23 18:18:13,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 18:18:13,352 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 18:18:14,112 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:18:14,117 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 18:18:14,451 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 18:18:14,474 INFO L193 MainTranslator]: Completed translation [2018-10-23 18:18:14,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14 WrapperNode [2018-10-23 18:18:14,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 18:18:14,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 18:18:14,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 18:18:14,477 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 18:18:14,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,528 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 18:18:14,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 18:18:14,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 18:18:14,809 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 18:18:14,820 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,834 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... [2018-10-23 18:18:14,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 18:18:14,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 18:18:14,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 18:18:14,980 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 18:18:14,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 18:18:15,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 18:18:15,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 18:18:15,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 18:18:22,444 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 18:18:22,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:22 BoogieIcfgContainer [2018-10-23 18:18:22,445 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 18:18:22,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 18:18:22,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 18:18:22,449 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 18:18:22,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:18:13" (1/3) ... [2018-10-23 18:18:22,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611ddc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:22, skipping insertion in model container [2018-10-23 18:18:22,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:18:14" (2/3) ... [2018-10-23 18:18:22,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@611ddc02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:18:22, skipping insertion in model container [2018-10-23 18:18:22,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:18:22" (3/3) ... [2018-10-23 18:18:22,454 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label05_false-unreach-call.c [2018-10-23 18:18:22,466 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 18:18:22,475 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 18:18:22,493 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 18:18:22,533 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 18:18:22,534 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 18:18:22,534 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 18:18:22,534 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 18:18:22,534 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 18:18:22,534 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 18:18:22,535 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 18:18:22,535 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 18:18:22,535 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 18:18:22,563 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2018-10-23 18:18:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 18:18:22,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:22,572 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] [2018-10-23 18:18:22,575 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:22,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:22,581 INFO L82 PathProgramCache]: Analyzing trace with hash 183950178, now seen corresponding path program 1 times [2018-10-23 18:18:22,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:22,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:22,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:22,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:22,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:22,999 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-23 18:18:23,006 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 18:18:23,010 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:18:23,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:18:23,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:18:23,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:18:23,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:18:23,034 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2018-10-23 18:18:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:18:30,116 INFO L93 Difference]: Finished difference Result 1473 states and 2781 transitions. [2018-10-23 18:18:30,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:18:30,119 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2018-10-23 18:18:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:18:30,150 INFO L225 Difference]: With dead ends: 1473 [2018-10-23 18:18:30,150 INFO L226 Difference]: Without dead ends: 1069 [2018-10-23 18:18:30,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:18:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2018-10-23 18:18:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 724. [2018-10-23 18:18:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-23 18:18:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 1277 transitions. [2018-10-23 18:18:30,260 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 1277 transitions. Word has length 20 [2018-10-23 18:18:30,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:18:30,261 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 1277 transitions. [2018-10-23 18:18:30,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:18:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 1277 transitions. [2018-10-23 18:18:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-23 18:18:30,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:30,265 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:18:30,266 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:30,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 832241570, now seen corresponding path program 1 times [2018-10-23 18:18:30,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:30,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:30,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:30,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:30,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:18:30,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:18:30,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:18:30,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:18:30,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:18:30,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:18:30,495 INFO L87 Difference]: Start difference. First operand 724 states and 1277 transitions. Second operand 4 states. [2018-10-23 18:18:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:18:35,432 INFO L93 Difference]: Finished difference Result 2766 states and 4980 transitions. [2018-10-23 18:18:35,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:18:35,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2018-10-23 18:18:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:18:35,446 INFO L225 Difference]: With dead ends: 2766 [2018-10-23 18:18:35,446 INFO L226 Difference]: Without dead ends: 2044 [2018-10-23 18:18:35,449 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 18:18:35,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2018-10-23 18:18:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2018-10-23 18:18:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-10-23 18:18:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3249 transitions. [2018-10-23 18:18:35,498 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3249 transitions. Word has length 87 [2018-10-23 18:18:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:18:35,499 INFO L481 AbstractCegarLoop]: Abstraction has 2044 states and 3249 transitions. [2018-10-23 18:18:35,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:18:35,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3249 transitions. [2018-10-23 18:18:35,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-23 18:18:35,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:35,503 INFO L375 BasicCegarLoop]: trace histogram [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] [2018-10-23 18:18:35,504 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:35,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:35,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1850634171, now seen corresponding path program 1 times [2018-10-23 18:18:35,504 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:35,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:35,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:35,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:35,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:35,861 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:18:36,304 WARN L179 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2018-10-23 18:18:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 18:18:36,339 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:18:36,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-23 18:18:36,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:18:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:18:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:18:36,341 INFO L87 Difference]: Start difference. First operand 2044 states and 3249 transitions. Second operand 6 states. [2018-10-23 18:18:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:18:42,939 INFO L93 Difference]: Finished difference Result 6728 states and 10478 transitions. [2018-10-23 18:18:42,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:18:42,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2018-10-23 18:18:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:18:42,974 INFO L225 Difference]: With dead ends: 6728 [2018-10-23 18:18:42,974 INFO L226 Difference]: Without dead ends: 4686 [2018-10-23 18:18:42,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:18:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2018-10-23 18:18:43,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 4686. [2018-10-23 18:18:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4686 states. [2018-10-23 18:18:43,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4686 states to 4686 states and 6895 transitions. [2018-10-23 18:18:43,069 INFO L78 Accepts]: Start accepts. Automaton has 4686 states and 6895 transitions. Word has length 100 [2018-10-23 18:18:43,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:18:43,070 INFO L481 AbstractCegarLoop]: Abstraction has 4686 states and 6895 transitions. [2018-10-23 18:18:43,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:18:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4686 states and 6895 transitions. [2018-10-23 18:18:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-23 18:18:43,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:43,076 INFO L375 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:18:43,076 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:43,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:43,079 INFO L82 PathProgramCache]: Analyzing trace with hash -852110444, now seen corresponding path program 1 times [2018-10-23 18:18:43,079 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:43,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:43,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:43,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:43,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2018-10-23 18:18:43,332 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:18:43,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 18:18:43,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:18:43,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:18:43,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:18:43,333 INFO L87 Difference]: Start difference. First operand 4686 states and 6895 transitions. Second operand 3 states. [2018-10-23 18:18:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:18:45,791 INFO L93 Difference]: Finished difference Result 12998 states and 19544 transitions. [2018-10-23 18:18:45,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:18:45,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2018-10-23 18:18:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:18:45,834 INFO L225 Difference]: With dead ends: 12998 [2018-10-23 18:18:45,835 INFO L226 Difference]: Without dead ends: 8646 [2018-10-23 18:18:45,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 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 18:18:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2018-10-23 18:18:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8646. [2018-10-23 18:18:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8646 states. [2018-10-23 18:18:46,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8646 states to 8646 states and 12001 transitions. [2018-10-23 18:18:46,037 INFO L78 Accepts]: Start accepts. Automaton has 8646 states and 12001 transitions. Word has length 188 [2018-10-23 18:18:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:18:46,038 INFO L481 AbstractCegarLoop]: Abstraction has 8646 states and 12001 transitions. [2018-10-23 18:18:46,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:18:46,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8646 states and 12001 transitions. [2018-10-23 18:18:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-23 18:18:46,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:46,052 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:18:46,052 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:46,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:46,053 INFO L82 PathProgramCache]: Analyzing trace with hash -382813575, now seen corresponding path program 1 times [2018-10-23 18:18:46,053 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:46,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:46,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:46,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:46,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:46,487 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:18:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 207 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-23 18:18:46,977 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:18:46,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:18:46,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:18:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:18:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:18:46,978 INFO L87 Difference]: Start difference. First operand 8646 states and 12001 transitions. Second operand 7 states. [2018-10-23 18:18:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:18:51,417 INFO L93 Difference]: Finished difference Result 17367 states and 24077 transitions. [2018-10-23 18:18:51,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:18:51,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 344 [2018-10-23 18:18:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:18:51,458 INFO L225 Difference]: With dead ends: 17367 [2018-10-23 18:18:51,458 INFO L226 Difference]: Without dead ends: 8723 [2018-10-23 18:18:51,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:18:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8723 states. [2018-10-23 18:18:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8723 to 8644. [2018-10-23 18:18:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8644 states. [2018-10-23 18:18:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 11991 transitions. [2018-10-23 18:18:51,618 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 11991 transitions. Word has length 344 [2018-10-23 18:18:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:18:51,618 INFO L481 AbstractCegarLoop]: Abstraction has 8644 states and 11991 transitions. [2018-10-23 18:18:51,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 18:18:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 11991 transitions. [2018-10-23 18:18:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2018-10-23 18:18:51,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:51,631 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 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 18:18:51,631 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:51,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1499308984, now seen corresponding path program 1 times [2018-10-23 18:18:51,632 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:51,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:51,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:51,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:51,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 480 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-23 18:18:51,983 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:18:51,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:18:51,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:18:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:18:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:18:51,985 INFO L87 Difference]: Start difference. First operand 8644 states and 11991 transitions. Second operand 3 states. [2018-10-23 18:18:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:18:54,288 INFO L93 Difference]: Finished difference Result 17286 states and 23997 transitions. [2018-10-23 18:18:54,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:18:54,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 432 [2018-10-23 18:18:54,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:18:54,308 INFO L225 Difference]: With dead ends: 17286 [2018-10-23 18:18:54,308 INFO L226 Difference]: Without dead ends: 6982 [2018-10-23 18:18:54,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 18:18:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6982 states. [2018-10-23 18:18:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6982 to 6652. [2018-10-23 18:18:54,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6652 states. [2018-10-23 18:18:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6652 states to 6652 states and 7477 transitions. [2018-10-23 18:18:54,408 INFO L78 Accepts]: Start accepts. Automaton has 6652 states and 7477 transitions. Word has length 432 [2018-10-23 18:18:54,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:18:54,409 INFO L481 AbstractCegarLoop]: Abstraction has 6652 states and 7477 transitions. [2018-10-23 18:18:54,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:18:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6652 states and 7477 transitions. [2018-10-23 18:18:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2018-10-23 18:18:54,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:18:54,418 INFO L375 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:18:54,418 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:18:54,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:18:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash -613698571, now seen corresponding path program 1 times [2018-10-23 18:18:54,419 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:18:54,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:18:54,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:54,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:54,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:18:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:54,941 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-23 18:18:55,340 WARN L179 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 18:18:55,755 WARN L179 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2018-10-23 18:18:56,048 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 20 [2018-10-23 18:18:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 240 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:18:57,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:18:57,232 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 18:18:57,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:18:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:18:57,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:18:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2018-10-23 18:18:57,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:18:57,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2018-10-23 18:18:57,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:18:57,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:18:57,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:18:57,740 INFO L87 Difference]: Start difference. First operand 6652 states and 7477 transitions. Second operand 9 states. [2018-10-23 18:19:04,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:04,604 INFO L93 Difference]: Finished difference Result 16292 states and 18243 transitions. [2018-10-23 18:19:04,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 18:19:04,609 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 448 [2018-10-23 18:19:04,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:04,630 INFO L225 Difference]: With dead ends: 16292 [2018-10-23 18:19:04,631 INFO L226 Difference]: Without dead ends: 9972 [2018-10-23 18:19:04,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 447 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2018-10-23 18:19:04,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9972 states. [2018-10-23 18:19:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9972 to 9292. [2018-10-23 18:19:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9292 states. [2018-10-23 18:19:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9292 states to 9292 states and 10240 transitions. [2018-10-23 18:19:04,919 INFO L78 Accepts]: Start accepts. Automaton has 9292 states and 10240 transitions. Word has length 448 [2018-10-23 18:19:04,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:04,920 INFO L481 AbstractCegarLoop]: Abstraction has 9292 states and 10240 transitions. [2018-10-23 18:19:04,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:19:04,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9292 states and 10240 transitions. [2018-10-23 18:19:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2018-10-23 18:19:04,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:04,944 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:04,945 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:04,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1823474811, now seen corresponding path program 1 times [2018-10-23 18:19:04,945 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:04,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:04,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:04,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:04,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:05,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 658 backedges. 515 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2018-10-23 18:19:05,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:19:05,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:19:05,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:19:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:19:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:05,588 INFO L87 Difference]: Start difference. First operand 9292 states and 10240 transitions. Second operand 4 states. [2018-10-23 18:19:08,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:08,861 INFO L93 Difference]: Finished difference Result 20892 states and 23071 transitions. [2018-10-23 18:19:08,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:19:08,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 574 [2018-10-23 18:19:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:08,884 INFO L225 Difference]: With dead ends: 20892 [2018-10-23 18:19:08,884 INFO L226 Difference]: Without dead ends: 11600 [2018-10-23 18:19:08,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11600 states. [2018-10-23 18:19:09,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11600 to 11270. [2018-10-23 18:19:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11270 states. [2018-10-23 18:19:09,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11270 states to 11270 states and 12074 transitions. [2018-10-23 18:19:09,042 INFO L78 Accepts]: Start accepts. Automaton has 11270 states and 12074 transitions. Word has length 574 [2018-10-23 18:19:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:09,043 INFO L481 AbstractCegarLoop]: Abstraction has 11270 states and 12074 transitions. [2018-10-23 18:19:09,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:19:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 11270 states and 12074 transitions. [2018-10-23 18:19:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-10-23 18:19:09,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:09,068 INFO L375 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 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 18:19:09,068 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:09,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1992105334, now seen corresponding path program 1 times [2018-10-23 18:19:09,069 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:09,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:09,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:09,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:09,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-23 18:19:09,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:19:09,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:19:09,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:19:09,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:19:09,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:09,969 INFO L87 Difference]: Start difference. First operand 11270 states and 12074 transitions. Second operand 4 states. [2018-10-23 18:19:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:14,138 INFO L93 Difference]: Finished difference Result 25178 states and 27080 transitions. [2018-10-23 18:19:14,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:19:14,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 675 [2018-10-23 18:19:14,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:14,162 INFO L225 Difference]: With dead ends: 25178 [2018-10-23 18:19:14,162 INFO L226 Difference]: Without dead ends: 14240 [2018-10-23 18:19:14,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14240 states. [2018-10-23 18:19:14,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14240 to 13910. [2018-10-23 18:19:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13910 states. [2018-10-23 18:19:14,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 14764 transitions. [2018-10-23 18:19:14,341 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 14764 transitions. Word has length 675 [2018-10-23 18:19:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:14,342 INFO L481 AbstractCegarLoop]: Abstraction has 13910 states and 14764 transitions. [2018-10-23 18:19:14,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:19:14,342 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 14764 transitions. [2018-10-23 18:19:14,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2018-10-23 18:19:14,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:14,382 INFO L375 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 18:19:14,382 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:14,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:14,383 INFO L82 PathProgramCache]: Analyzing trace with hash 813981583, now seen corresponding path program 1 times [2018-10-23 18:19:14,383 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:14,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:14,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:14,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:14,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:15,057 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:19:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 54 proven. 220 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2018-10-23 18:19:15,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:19:15,877 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 18:19:15,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:16,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:19:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1000 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 929 trivial. 0 not checked. [2018-10-23 18:19:16,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:19:16,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-23 18:19:16,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 18:19:16,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 18:19:16,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:19:16,575 INFO L87 Difference]: Start difference. First operand 13910 states and 14764 transitions. Second operand 8 states. [2018-10-23 18:19:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:21,566 INFO L93 Difference]: Finished difference Result 27632 states and 29338 transitions. [2018-10-23 18:19:21,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:19:21,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 835 [2018-10-23 18:19:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:21,591 INFO L225 Difference]: With dead ends: 27632 [2018-10-23 18:19:21,592 INFO L226 Difference]: Without dead ends: 14054 [2018-10-23 18:19:21,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 836 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:19:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14054 states. [2018-10-23 18:19:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14054 to 13250. [2018-10-23 18:19:21,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13250 states. [2018-10-23 18:19:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13250 states to 13250 states and 13941 transitions. [2018-10-23 18:19:21,949 INFO L78 Accepts]: Start accepts. Automaton has 13250 states and 13941 transitions. Word has length 835 [2018-10-23 18:19:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:21,950 INFO L481 AbstractCegarLoop]: Abstraction has 13250 states and 13941 transitions. [2018-10-23 18:19:21,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 18:19:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13250 states and 13941 transitions. [2018-10-23 18:19:21,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1228 [2018-10-23 18:19:21,988 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:21,989 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 18:19:21,989 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:21,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:21,990 INFO L82 PathProgramCache]: Analyzing trace with hash -621107017, now seen corresponding path program 1 times [2018-10-23 18:19:21,990 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:21,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:21,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:21,991 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:21,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:23,014 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-23 18:19:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2541 backedges. 1770 proven. 0 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2018-10-23 18:19:24,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:19:24,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 18:19:24,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 18:19:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 18:19:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-23 18:19:24,700 INFO L87 Difference]: Start difference. First operand 13250 states and 13941 transitions. Second operand 6 states. [2018-10-23 18:19:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:27,459 INFO L93 Difference]: Finished difference Result 27972 states and 29380 transitions. [2018-10-23 18:19:27,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 18:19:27,459 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1227 [2018-10-23 18:19:27,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:27,477 INFO L225 Difference]: With dead ends: 27972 [2018-10-23 18:19:27,477 INFO L226 Difference]: Without dead ends: 15054 [2018-10-23 18:19:27,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:19:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15054 states. [2018-10-23 18:19:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15054 to 14570. [2018-10-23 18:19:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14570 states. [2018-10-23 18:19:27,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14570 states to 14570 states and 15272 transitions. [2018-10-23 18:19:27,653 INFO L78 Accepts]: Start accepts. Automaton has 14570 states and 15272 transitions. Word has length 1227 [2018-10-23 18:19:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:27,655 INFO L481 AbstractCegarLoop]: Abstraction has 14570 states and 15272 transitions. [2018-10-23 18:19:27,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:19:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 14570 states and 15272 transitions. [2018-10-23 18:19:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1239 [2018-10-23 18:19:27,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:27,683 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-10-23 18:19:27,684 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:27,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:27,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1167487614, now seen corresponding path program 1 times [2018-10-23 18:19:27,684 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:27,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:27,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:27,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:27,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2823 backedges. 995 proven. 0 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2018-10-23 18:19:29,668 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:19:29,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:19:29,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:19:29,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:19:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:29,669 INFO L87 Difference]: Start difference. First operand 14570 states and 15272 transitions. Second operand 4 states. [2018-10-23 18:19:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:32,193 INFO L93 Difference]: Finished difference Result 35070 states and 36795 transitions. [2018-10-23 18:19:32,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:19:32,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1238 [2018-10-23 18:19:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:32,209 INFO L225 Difference]: With dead ends: 35070 [2018-10-23 18:19:32,209 INFO L226 Difference]: Without dead ends: 17182 [2018-10-23 18:19:32,214 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 18:19:32,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17182 states. [2018-10-23 18:19:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17182 to 16852. [2018-10-23 18:19:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16852 states. [2018-10-23 18:19:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16852 states to 16852 states and 17364 transitions. [2018-10-23 18:19:32,385 INFO L78 Accepts]: Start accepts. Automaton has 16852 states and 17364 transitions. Word has length 1238 [2018-10-23 18:19:32,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:32,386 INFO L481 AbstractCegarLoop]: Abstraction has 16852 states and 17364 transitions. [2018-10-23 18:19:32,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:19:32,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16852 states and 17364 transitions. [2018-10-23 18:19:32,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1402 [2018-10-23 18:19:32,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:32,422 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:19:32,422 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:32,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -170585411, now seen corresponding path program 1 times [2018-10-23 18:19:32,423 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:32,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:32,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:32,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:32,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3761 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 3618 trivial. 0 not checked. [2018-10-23 18:19:34,415 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:19:34,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:19:34,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:19:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:19:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:34,416 INFO L87 Difference]: Start difference. First operand 16852 states and 17364 transitions. Second operand 4 states. [2018-10-23 18:19:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:36,525 INFO L93 Difference]: Finished difference Result 33702 states and 34735 transitions. [2018-10-23 18:19:36,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:19:36,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1401 [2018-10-23 18:19:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:36,546 INFO L225 Difference]: With dead ends: 33702 [2018-10-23 18:19:36,546 INFO L226 Difference]: Without dead ends: 15858 [2018-10-23 18:19:36,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:19:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15858 states. [2018-10-23 18:19:36,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15858 to 15528. [2018-10-23 18:19:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15528 states. [2018-10-23 18:19:36,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15528 states to 15528 states and 15903 transitions. [2018-10-23 18:19:36,727 INFO L78 Accepts]: Start accepts. Automaton has 15528 states and 15903 transitions. Word has length 1401 [2018-10-23 18:19:36,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:36,728 INFO L481 AbstractCegarLoop]: Abstraction has 15528 states and 15903 transitions. [2018-10-23 18:19:36,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:19:36,728 INFO L276 IsEmpty]: Start isEmpty. Operand 15528 states and 15903 transitions. [2018-10-23 18:19:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1841 [2018-10-23 18:19:36,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:36,762 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:19:36,763 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:36,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:36,763 INFO L82 PathProgramCache]: Analyzing trace with hash -357593829, now seen corresponding path program 1 times [2018-10-23 18:19:36,763 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:36,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:36,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:36,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:36,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:38,585 WARN L179 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-23 18:19:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5634 backedges. 2494 proven. 243 refuted. 0 times theorem prover too weak. 2897 trivial. 0 not checked. [2018-10-23 18:19:42,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:19:42,635 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 18:19:42,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:43,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:43,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:19:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5634 backedges. 2494 proven. 0 refuted. 0 times theorem prover too weak. 3140 trivial. 0 not checked. [2018-10-23 18:19:45,572 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:19:45,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 9 [2018-10-23 18:19:45,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:19:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:19:45,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:19:45,576 INFO L87 Difference]: Start difference. First operand 15528 states and 15903 transitions. Second operand 10 states. [2018-10-23 18:19:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:19:53,285 INFO L93 Difference]: Finished difference Result 33040 states and 33839 transitions. [2018-10-23 18:19:53,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 18:19:53,286 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1840 [2018-10-23 18:19:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:19:53,302 INFO L225 Difference]: With dead ends: 33040 [2018-10-23 18:19:53,302 INFO L226 Difference]: Without dead ends: 17844 [2018-10-23 18:19:53,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1856 GetRequests, 1839 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2018-10-23 18:19:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17844 states. [2018-10-23 18:19:53,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17844 to 15858. [2018-10-23 18:19:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15858 states. [2018-10-23 18:19:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15858 states to 15858 states and 16235 transitions. [2018-10-23 18:19:53,468 INFO L78 Accepts]: Start accepts. Automaton has 15858 states and 16235 transitions. Word has length 1840 [2018-10-23 18:19:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:19:53,468 INFO L481 AbstractCegarLoop]: Abstraction has 15858 states and 16235 transitions. [2018-10-23 18:19:53,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:19:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 15858 states and 16235 transitions. [2018-10-23 18:19:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1872 [2018-10-23 18:19:53,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:19:53,505 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:19:53,505 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:19:53,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:19:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2065057755, now seen corresponding path program 1 times [2018-10-23 18:19:53,506 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:19:53,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:19:53,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:53,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:53,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:19:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:54,350 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2018-10-23 18:19:54,660 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-10-23 18:19:55,017 WARN L179 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2018-10-23 18:19:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 2407 proven. 158 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2018-10-23 18:19:57,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:19:57,913 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 18:19:57,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:19:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:19:58,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:20:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6270 backedges. 2565 proven. 0 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2018-10-23 18:20:00,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:20:00,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2018-10-23 18:20:00,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 18:20:00,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 18:20:00,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-10-23 18:20:00,998 INFO L87 Difference]: Start difference. First operand 15858 states and 16235 transitions. Second operand 10 states. [2018-10-23 18:20:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:08,794 INFO L93 Difference]: Finished difference Result 43040 states and 44142 transitions. [2018-10-23 18:20:08,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 18:20:08,795 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 1871 [2018-10-23 18:20:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:08,824 INFO L225 Difference]: With dead ends: 43040 [2018-10-23 18:20:08,824 INFO L226 Difference]: Without dead ends: 27514 [2018-10-23 18:20:08,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1901 GetRequests, 1881 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2018-10-23 18:20:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27514 states. [2018-10-23 18:20:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27514 to 22184. [2018-10-23 18:20:09,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22184 states. [2018-10-23 18:20:09,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22184 states to 22184 states and 22683 transitions. [2018-10-23 18:20:09,052 INFO L78 Accepts]: Start accepts. Automaton has 22184 states and 22683 transitions. Word has length 1871 [2018-10-23 18:20:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:09,052 INFO L481 AbstractCegarLoop]: Abstraction has 22184 states and 22683 transitions. [2018-10-23 18:20:09,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 18:20:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 22184 states and 22683 transitions. [2018-10-23 18:20:09,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2281 [2018-10-23 18:20:09,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:09,091 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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 18:20:09,091 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:09,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1235059713, now seen corresponding path program 1 times [2018-10-23 18:20:09,092 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:09,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:09,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:09,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:09,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:09,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9625 backedges. 2180 proven. 0 refuted. 0 times theorem prover too weak. 7445 trivial. 0 not checked. [2018-10-23 18:20:12,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:20:12,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 18:20:12,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 18:20:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 18:20:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 18:20:12,751 INFO L87 Difference]: Start difference. First operand 22184 states and 22683 transitions. Second operand 3 states. [2018-10-23 18:20:14,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:14,015 INFO L93 Difference]: Finished difference Result 45686 states and 46709 transitions. [2018-10-23 18:20:14,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:20:14,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2280 [2018-10-23 18:20:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:14,037 INFO L225 Difference]: With dead ends: 45686 [2018-10-23 18:20:14,037 INFO L226 Difference]: Without dead ends: 23172 [2018-10-23 18:20:14,049 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 18:20:14,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23172 states. [2018-10-23 18:20:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23172 to 22182. [2018-10-23 18:20:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22182 states. [2018-10-23 18:20:14,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22182 states to 22182 states and 22638 transitions. [2018-10-23 18:20:14,246 INFO L78 Accepts]: Start accepts. Automaton has 22182 states and 22638 transitions. Word has length 2280 [2018-10-23 18:20:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:14,248 INFO L481 AbstractCegarLoop]: Abstraction has 22182 states and 22638 transitions. [2018-10-23 18:20:14,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 18:20:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 22182 states and 22638 transitions. [2018-10-23 18:20:14,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2316 [2018-10-23 18:20:14,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:14,298 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:14,298 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:14,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2139992758, now seen corresponding path program 1 times [2018-10-23 18:20:14,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:14,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:14,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:14,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:14,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9534 backedges. 4084 proven. 251 refuted. 0 times theorem prover too weak. 5199 trivial. 0 not checked. [2018-10-23 18:20:21,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:20:21,383 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 18:20:21,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:21,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:20:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9534 backedges. 5492 proven. 0 refuted. 0 times theorem prover too weak. 4042 trivial. 0 not checked. [2018-10-23 18:20:24,601 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:20:24,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2018-10-23 18:20:24,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 18:20:24,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 18:20:24,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-23 18:20:24,604 INFO L87 Difference]: Start difference. First operand 22182 states and 22638 transitions. Second operand 9 states. [2018-10-23 18:20:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:32,858 INFO L93 Difference]: Finished difference Result 47070 states and 48022 transitions. [2018-10-23 18:20:32,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 18:20:32,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 2315 [2018-10-23 18:20:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:32,882 INFO L225 Difference]: With dead ends: 47070 [2018-10-23 18:20:32,882 INFO L226 Difference]: Without dead ends: 25220 [2018-10-23 18:20:32,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2334 GetRequests, 2318 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:20:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25220 states. [2018-10-23 18:20:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25220 to 21065. [2018-10-23 18:20:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21065 states. [2018-10-23 18:20:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21065 states to 21065 states and 21412 transitions. [2018-10-23 18:20:33,085 INFO L78 Accepts]: Start accepts. Automaton has 21065 states and 21412 transitions. Word has length 2315 [2018-10-23 18:20:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:33,086 INFO L481 AbstractCegarLoop]: Abstraction has 21065 states and 21412 transitions. [2018-10-23 18:20:33,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 18:20:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21065 states and 21412 transitions. [2018-10-23 18:20:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2669 [2018-10-23 18:20:33,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:33,145 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:20:33,145 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:33,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1700302108, now seen corresponding path program 1 times [2018-10-23 18:20:33,146 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:33,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:33,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:33,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:33,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:36,130 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-23 18:20:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11795 backedges. 8386 proven. 1504 refuted. 0 times theorem prover too weak. 1905 trivial. 0 not checked. [2018-10-23 18:20:44,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:20:44,088 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 18:20:44,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:20:44,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:20:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11795 backedges. 7341 proven. 0 refuted. 0 times theorem prover too weak. 4454 trivial. 0 not checked. [2018-10-23 18:20:48,208 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:20:48,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2018-10-23 18:20:48,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 18:20:48,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 18:20:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-10-23 18:20:48,213 INFO L87 Difference]: Start difference. First operand 21065 states and 21412 transitions. Second operand 11 states. [2018-10-23 18:20:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:20:55,655 INFO L93 Difference]: Finished difference Result 42490 states and 43193 transitions. [2018-10-23 18:20:55,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 18:20:55,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 2668 [2018-10-23 18:20:55,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:20:55,681 INFO L225 Difference]: With dead ends: 42490 [2018-10-23 18:20:55,681 INFO L226 Difference]: Without dead ends: 21757 [2018-10-23 18:20:55,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2689 GetRequests, 2671 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2018-10-23 18:20:55,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21757 states. [2018-10-23 18:20:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21757 to 21725. [2018-10-23 18:20:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21725 states. [2018-10-23 18:20:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21725 states to 21725 states and 22071 transitions. [2018-10-23 18:20:55,915 INFO L78 Accepts]: Start accepts. Automaton has 21725 states and 22071 transitions. Word has length 2668 [2018-10-23 18:20:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:20:55,917 INFO L481 AbstractCegarLoop]: Abstraction has 21725 states and 22071 transitions. [2018-10-23 18:20:55,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 18:20:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 21725 states and 22071 transitions. [2018-10-23 18:20:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2696 [2018-10-23 18:20:55,967 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:20:55,968 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2018-10-23 18:20:55,968 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:20:55,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:20:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 999630116, now seen corresponding path program 1 times [2018-10-23 18:20:55,969 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:20:55,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:20:55,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:55,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:20:55,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:20:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:00,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12565 backedges. 2207 proven. 18 refuted. 0 times theorem prover too weak. 10340 trivial. 0 not checked. [2018-10-23 18:21:00,961 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:00,961 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 18:21:00,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:01,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12565 backedges. 2207 proven. 18 refuted. 0 times theorem prover too weak. 10340 trivial. 0 not checked. [2018-10-23 18:21:04,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:21:04,762 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2018-10-23 18:21:04,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 18:21:04,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 18:21:04,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:21:04,764 INFO L87 Difference]: Start difference. First operand 21725 states and 22071 transitions. Second operand 5 states. [2018-10-23 18:21:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:07,699 INFO L93 Difference]: Finished difference Result 45027 states and 45770 transitions. [2018-10-23 18:21:07,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:21:07,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 2695 [2018-10-23 18:21:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:07,723 INFO L225 Difference]: With dead ends: 45027 [2018-10-23 18:21:07,723 INFO L226 Difference]: Without dead ends: 23303 [2018-10-23 18:21:07,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2699 GetRequests, 2694 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 18:21:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23303 states. [2018-10-23 18:21:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23303 to 22054. [2018-10-23 18:21:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22054 states. [2018-10-23 18:21:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 22381 transitions. [2018-10-23 18:21:07,941 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 22381 transitions. Word has length 2695 [2018-10-23 18:21:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:07,942 INFO L481 AbstractCegarLoop]: Abstraction has 22054 states and 22381 transitions. [2018-10-23 18:21:07,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 18:21:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 22381 transitions. [2018-10-23 18:21:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2708 [2018-10-23 18:21:07,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:07,993 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 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 18:21:07,993 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:07,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:07,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1848506455, now seen corresponding path program 1 times [2018-10-23 18:21:07,994 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:07,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:07,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:07,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:10,480 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-10-23 18:21:10,736 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-10-23 18:21:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13070 backedges. 10344 proven. 482 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2018-10-23 18:21:19,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:19,914 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 18:21:19,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:20,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:27,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13070 backedges. 9779 proven. 816 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-23 18:21:27,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:21:27,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2018-10-23 18:21:27,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 18:21:27,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 18:21:27,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-23 18:21:27,979 INFO L87 Difference]: Start difference. First operand 22054 states and 22381 transitions. Second operand 13 states. [2018-10-23 18:21:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:21:40,118 INFO L93 Difference]: Finished difference Result 46583 states and 47269 transitions. [2018-10-23 18:21:40,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 18:21:40,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 2707 [2018-10-23 18:21:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:21:40,140 INFO L225 Difference]: With dead ends: 46583 [2018-10-23 18:21:40,140 INFO L226 Difference]: Without dead ends: 24861 [2018-10-23 18:21:40,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2731 GetRequests, 2710 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2018-10-23 18:21:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24861 states. [2018-10-23 18:21:40,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24861 to 22384. [2018-10-23 18:21:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22384 states. [2018-10-23 18:21:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22384 states to 22384 states and 22708 transitions. [2018-10-23 18:21:40,356 INFO L78 Accepts]: Start accepts. Automaton has 22384 states and 22708 transitions. Word has length 2707 [2018-10-23 18:21:40,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:21:40,358 INFO L481 AbstractCegarLoop]: Abstraction has 22384 states and 22708 transitions. [2018-10-23 18:21:40,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 18:21:40,358 INFO L276 IsEmpty]: Start isEmpty. Operand 22384 states and 22708 transitions. [2018-10-23 18:21:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2776 [2018-10-23 18:21:40,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:21:40,406 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 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 18:21:40,407 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:21:40,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:21:40,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1332012024, now seen corresponding path program 1 times [2018-10-23 18:21:40,408 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:21:40,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:21:40,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:40,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:40,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:21:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 13903 backedges. 7433 proven. 2468 refuted. 0 times theorem prover too weak. 4002 trivial. 0 not checked. [2018-10-23 18:21:50,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:21:50,855 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 18:21:50,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:21:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:21:51,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:21:52,116 WARN L179 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 28 [2018-10-23 18:21:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13903 backedges. 8359 proven. 0 refuted. 0 times theorem prover too weak. 5544 trivial. 0 not checked. [2018-10-23 18:21:59,139 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 18:21:59,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [18] total 20 [2018-10-23 18:21:59,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 18:21:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 18:21:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-10-23 18:21:59,144 INFO L87 Difference]: Start difference. First operand 22384 states and 22708 transitions. Second operand 20 states. Received shutdown request... [2018-10-23 18:22:00,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 18:22:00,642 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:22:00,647 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:22:00,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:22:00 BoogieIcfgContainer [2018-10-23 18:22:00,647 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:22:00,648 INFO L168 Benchmark]: Toolchain (without parser) took 227409.35 ms. Allocated memory was 1.5 GB in the beginning and 4.2 GB in the end (delta: 2.7 GB). Free memory was 1.4 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-23 18:22:00,649 INFO L168 Benchmark]: CDTParser took 0.24 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 18:22:00,649 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1234.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. [2018-10-23 18:22:00,650 INFO L168 Benchmark]: Boogie Procedure Inliner took 331.55 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -865.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. [2018-10-23 18:22:00,651 INFO L168 Benchmark]: Boogie Preprocessor took 170.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2018-10-23 18:22:00,652 INFO L168 Benchmark]: RCFGBuilder took 7465.19 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 292.5 MB). Peak memory consumption was 292.5 MB. Max. memory is 7.1 GB. [2018-10-23 18:22:00,653 INFO L168 Benchmark]: TraceAbstraction took 218201.45 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -555.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. [2018-10-23 18:22:00,657 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 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 1234.77 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 84.6 MB). Peak memory consumption was 84.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 331.55 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 751.8 MB). Free memory was 1.3 GB in the beginning and 2.2 GB in the end (delta: -865.3 MB). Peak memory consumption was 28.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 170.99 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 7465.19 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 292.5 MB). Peak memory consumption was 292.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 218201.45 ms. Allocated memory was 2.3 GB in the beginning and 4.2 GB in the end (delta: 1.9 GB). Free memory was 1.9 GB in the beginning and 2.5 GB in the end (delta: -555.4 MB). Peak memory consumption was 1.4 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 64). Cancelled while BasicCegarLoop was constructing difference of abstraction (22384states) and FLOYD_HOARE automaton (currently 5 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (273 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 397 locations, 1 error locations. TIMEOUT Result, 218.1s OverallTime, 21 OverallIterations, 14 TraceHistogramMax, 104.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 4774 SDtfs, 30607 SDslu, 2232 SDs, 0 SdLazy, 70815 SolverSat, 5153 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18378 GetRequests, 18194 SyntacticMatches, 37 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 12.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22384occurred in iteration=20, 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: 3.4s AutomataMinimizationTime, 20 MinimizatonAttempts, 20261 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.2s SsaConstructionTime, 5.1s SatisfiabilityAnalysisTime, 54.8s InterpolantComputationTime, 44874 NumberOfCodeBlocks, 44874 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 44844 ConstructedInterpolants, 498 QuantifiedInterpolants, 319557256 SizeOfPredicates, 6 NumberOfNonLiveVariables, 20674 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 30 InterpolantComputations, 19 PerfectInterpolantSequences, 163027/169270 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown