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/Problem12_label08_false-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 17:57:07,367 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 17:57:07,370 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 17:57:07,384 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 17:57:07,384 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 17:57:07,385 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 17:57:07,386 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 17:57:07,388 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 17:57:07,390 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 17:57:07,391 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 17:57:07,392 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 17:57:07,392 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 17:57:07,393 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 17:57:07,394 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 17:57:07,395 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 17:57:07,398 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 17:57:07,399 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 17:57:07,401 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 17:57:07,406 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 17:57:07,408 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 17:57:07,412 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 17:57:07,413 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 17:57:07,418 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 17:57:07,419 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 17:57:07,419 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 17:57:07,420 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 17:57:07,421 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 17:57:07,421 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 17:57:07,422 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 17:57:07,426 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 17:57:07,426 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 17:57:07,427 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-23 17:57:07,428 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-23 17:57:07,428 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-23 17:57:07,429 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-23 17:57:07,429 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-23 17:57:07,430 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 17:57:07,459 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 17:57:07,459 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 17:57:07,460 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 17:57:07,460 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 17:57:07,463 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 17:57:07,463 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 17:57:07,463 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 17:57:07,464 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 17:57:07,464 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 17:57:07,464 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 17:57:07,464 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 17:57:07,464 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 17:57:07,465 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 17:57:07,465 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 17:57:07,465 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 17:57:07,465 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 17:57:07,465 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 17:57:07,465 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 17:57:07,467 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 17:57:07,467 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 17:57:07,467 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 17:57:07,467 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 17:57:07,467 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 17:57:07,468 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 17:57:07,468 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 17:57:07,468 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 17:57:07,468 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 17:57:07,468 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 17:57:07,519 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 17:57:07,533 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 17:57:07,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 17:57:07,540 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 17:57:07,540 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 17:57:07,541 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label08_false-unreach-call.c [2018-10-23 17:57:07,609 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8e5ea3598/9f3b8ade371146f6a91396cb99206b93/FLAG78a37e3a7 [2018-10-23 17:57:08,436 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 17:57:08,437 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label08_false-unreach-call.c [2018-10-23 17:57:08,472 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8e5ea3598/9f3b8ade371146f6a91396cb99206b93/FLAG78a37e3a7 [2018-10-23 17:57:08,494 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8e5ea3598/9f3b8ade371146f6a91396cb99206b93 [2018-10-23 17:57:08,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 17:57:08,510 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 17:57:08,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 17:57:08,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 17:57:08,518 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 17:57:08,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:08" (1/1) ... [2018-10-23 17:57:08,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61cf1b32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:08, skipping insertion in model container [2018-10-23 17:57:08,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:57:08" (1/1) ... [2018-10-23 17:57:08,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 17:57:08,702 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 17:57:09,992 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:57:09,997 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 17:57:10,646 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 17:57:10,683 INFO L193 MainTranslator]: Completed translation [2018-10-23 17:57:10,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10 WrapperNode [2018-10-23 17:57:10,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 17:57:10,685 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 17:57:10,685 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 17:57:10,685 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 17:57:10,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:10,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 17:57:11,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 17:57:11,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 17:57:11,303 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 17:57:11,314 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (1/1) ... [2018-10-23 17:57:11,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 17:57:11,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 17:57:11,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 17:57:11,596 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 17:57:11,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (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 17:57:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2018-10-23 17:57:11,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 17:57:11,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 17:57:20,336 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 17:57:20,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:20 BoogieIcfgContainer [2018-10-23 17:57:20,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 17:57:20,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 17:57:20,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 17:57:20,341 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 17:57:20,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:57:08" (1/3) ... [2018-10-23 17:57:20,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2ad060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:20, skipping insertion in model container [2018-10-23 17:57:20,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:57:10" (2/3) ... [2018-10-23 17:57:20,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2ad060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:57:20, skipping insertion in model container [2018-10-23 17:57:20,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:57:20" (3/3) ... [2018-10-23 17:57:20,345 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label08_false-unreach-call.c [2018-10-23 17:57:20,355 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 17:57:20,365 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 17:57:20,380 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 17:57:20,436 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 17:57:20,437 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 17:57:20,437 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 17:57:20,437 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 17:57:20,437 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 17:57:20,437 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 17:57:20,438 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 17:57:20,438 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 17:57:20,438 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 17:57:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states. [2018-10-23 17:57:20,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-23 17:57:20,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:57:20,487 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 17:57:20,489 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:57:20,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:57:20,497 INFO L82 PathProgramCache]: Analyzing trace with hash 808956810, now seen corresponding path program 1 times [2018-10-23 17:57:20,499 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:57:20,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:57:20,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:20,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:57:20,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:57:20,955 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 4 [2018-10-23 17:57:20,965 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 17:57:20,967 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:57:20,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:57:20,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 17:57:20,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 17:57:20,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:57:20,993 INFO L87 Difference]: Start difference. First operand 819 states. Second operand 4 states. [2018-10-23 17:57:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:57:34,654 INFO L93 Difference]: Finished difference Result 3146 states and 6134 transitions. [2018-10-23 17:57:34,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 17:57:34,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2018-10-23 17:57:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:57:34,704 INFO L225 Difference]: With dead ends: 3146 [2018-10-23 17:57:34,704 INFO L226 Difference]: Without dead ends: 2320 [2018-10-23 17:57:34,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 17:57:34,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2018-10-23 17:57:34,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 2320. [2018-10-23 17:57:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2320 states. [2018-10-23 17:57:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 4222 transitions. [2018-10-23 17:57:34,883 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 4222 transitions. Word has length 30 [2018-10-23 17:57:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:57:34,884 INFO L481 AbstractCegarLoop]: Abstraction has 2320 states and 4222 transitions. [2018-10-23 17:57:34,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 17:57:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 4222 transitions. [2018-10-23 17:57:34,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-23 17:57:34,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:57:34,888 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:57:34,889 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:57:34,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:57:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1843346744, now seen corresponding path program 1 times [2018-10-23 17:57:34,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:57:34,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:57:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:34,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:57:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:57:35,451 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-10-23 17:57:35,709 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2018-10-23 17:57:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:57:35,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:57:35,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-23 17:57:35,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 17:57:35,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 17:57:35,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:57:35,921 INFO L87 Difference]: Start difference. First operand 2320 states and 4222 transitions. Second operand 7 states. [2018-10-23 17:57:40,468 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-23 17:57:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:57:57,042 INFO L93 Difference]: Finished difference Result 9904 states and 17611 transitions. [2018-10-23 17:57:57,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 17:57:57,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2018-10-23 17:57:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:57:57,080 INFO L225 Difference]: With dead ends: 9904 [2018-10-23 17:57:57,080 INFO L226 Difference]: Without dead ends: 7586 [2018-10-23 17:57:57,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-10-23 17:57:57,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7586 states. [2018-10-23 17:57:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7586 to 6080. [2018-10-23 17:57:57,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6080 states. [2018-10-23 17:57:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 9384 transitions. [2018-10-23 17:57:57,216 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 9384 transitions. Word has length 96 [2018-10-23 17:57:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:57:57,217 INFO L481 AbstractCegarLoop]: Abstraction has 6080 states and 9384 transitions. [2018-10-23 17:57:57,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 17:57:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 9384 transitions. [2018-10-23 17:57:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-23 17:57:57,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:57:57,221 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:57:57,221 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:57:57,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:57:57,221 INFO L82 PathProgramCache]: Analyzing trace with hash -995895591, now seen corresponding path program 1 times [2018-10-23 17:57:57,222 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:57:57,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:57:57,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:57,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:57:57,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:57:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:57:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-10-23 17:57:57,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:57:57,414 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 17:57:57,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:57:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:57:57,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:57:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:57:57,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:57:57,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2018-10-23 17:57:57,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:57:57,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:57:57,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:57:57,602 INFO L87 Difference]: Start difference. First operand 6080 states and 9384 transitions. Second operand 5 states. [2018-10-23 17:58:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:58:11,938 INFO L93 Difference]: Finished difference Result 27214 states and 43707 transitions. [2018-10-23 17:58:11,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:58:11,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 102 [2018-10-23 17:58:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:58:12,020 INFO L225 Difference]: With dead ends: 27214 [2018-10-23 17:58:12,020 INFO L226 Difference]: Without dead ends: 21136 [2018-10-23 17:58:12,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:58:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21136 states. [2018-10-23 17:58:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21136 to 15104. [2018-10-23 17:58:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15104 states. [2018-10-23 17:58:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15104 states to 15104 states and 22198 transitions. [2018-10-23 17:58:12,379 INFO L78 Accepts]: Start accepts. Automaton has 15104 states and 22198 transitions. Word has length 102 [2018-10-23 17:58:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:58:12,380 INFO L481 AbstractCegarLoop]: Abstraction has 15104 states and 22198 transitions. [2018-10-23 17:58:12,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:58:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 15104 states and 22198 transitions. [2018-10-23 17:58:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-23 17:58:12,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:58:12,392 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:58:12,392 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:58:12,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:58:12,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1710188800, now seen corresponding path program 1 times [2018-10-23 17:58:12,396 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:58:12,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:58:12,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:12,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:12,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 17:58:12,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:58:12,960 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 17:58:12,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:13,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:58:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2018-10-23 17:58:13,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:58:13,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2018-10-23 17:58:13,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 17:58:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 17:58:13,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:58:13,154 INFO L87 Difference]: Start difference. First operand 15104 states and 22198 transitions. Second operand 7 states. [2018-10-23 17:58:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:58:27,002 INFO L93 Difference]: Finished difference Result 59535 states and 86819 transitions. [2018-10-23 17:58:27,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 17:58:27,004 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 176 [2018-10-23 17:58:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:58:27,093 INFO L225 Difference]: With dead ends: 59535 [2018-10-23 17:58:27,093 INFO L226 Difference]: Without dead ends: 44433 [2018-10-23 17:58:27,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-23 17:58:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44433 states. [2018-10-23 17:58:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44433 to 42928. [2018-10-23 17:58:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42928 states. [2018-10-23 17:58:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42928 states to 42928 states and 56765 transitions. [2018-10-23 17:58:27,657 INFO L78 Accepts]: Start accepts. Automaton has 42928 states and 56765 transitions. Word has length 176 [2018-10-23 17:58:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:58:27,658 INFO L481 AbstractCegarLoop]: Abstraction has 42928 states and 56765 transitions. [2018-10-23 17:58:27,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 17:58:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 42928 states and 56765 transitions. [2018-10-23 17:58:27,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-10-23 17:58:27,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:58:27,672 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:58:27,673 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:58:27,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:58:27,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1630931784, now seen corresponding path program 1 times [2018-10-23 17:58:27,673 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:58:27,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:58:27,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:27,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:27,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 55 proven. 7 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2018-10-23 17:58:28,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:58:28,111 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 17:58:28,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:28,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:58:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2018-10-23 17:58:28,451 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:58:28,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2018-10-23 17:58:28,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:58:28,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:58:28,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:58:28,454 INFO L87 Difference]: Start difference. First operand 42928 states and 56765 transitions. Second operand 5 states. [2018-10-23 17:58:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:58:40,362 INFO L93 Difference]: Finished difference Result 123454 states and 163040 transitions. [2018-10-23 17:58:40,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:58:40,364 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2018-10-23 17:58:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:58:40,483 INFO L225 Difference]: With dead ends: 123454 [2018-10-23 17:58:40,483 INFO L226 Difference]: Without dead ends: 80528 [2018-10-23 17:58:40,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:58:40,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80528 states. [2018-10-23 17:58:41,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80528 to 79776. [2018-10-23 17:58:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79776 states. [2018-10-23 17:58:41,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79776 states to 79776 states and 95811 transitions. [2018-10-23 17:58:41,259 INFO L78 Accepts]: Start accepts. Automaton has 79776 states and 95811 transitions. Word has length 270 [2018-10-23 17:58:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:58:41,260 INFO L481 AbstractCegarLoop]: Abstraction has 79776 states and 95811 transitions. [2018-10-23 17:58:41,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:58:41,260 INFO L276 IsEmpty]: Start isEmpty. Operand 79776 states and 95811 transitions. [2018-10-23 17:58:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2018-10-23 17:58:41,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:58:41,285 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:58:41,286 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:58:41,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:58:41,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1107446318, now seen corresponding path program 1 times [2018-10-23 17:58:41,287 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:58:41,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:58:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:41,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:58:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:41,762 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 9 [2018-10-23 17:58:42,092 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 9 [2018-10-23 17:58:42,372 WARN L179 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 19 [2018-10-23 17:58:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 227 proven. 5 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:58:42,504 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:58:42,504 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 17:58:42,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:58:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:58:42,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:58:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 321 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-23 17:58:42,799 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 17:58:42,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2018-10-23 17:58:42,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 17:58:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 17:58:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-10-23 17:58:42,801 INFO L87 Difference]: Start difference. First operand 79776 states and 95811 transitions. Second operand 7 states. [2018-10-23 17:59:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:02,037 INFO L93 Difference]: Finished difference Result 241540 states and 284793 transitions. [2018-10-23 17:59:02,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 17:59:02,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 376 [2018-10-23 17:59:02,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:02,272 INFO L225 Difference]: With dead ends: 241540 [2018-10-23 17:59:02,273 INFO L226 Difference]: Without dead ends: 159507 [2018-10-23 17:59:02,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 377 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-23 17:59:02,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159507 states. [2018-10-23 17:59:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159507 to 127151. [2018-10-23 17:59:03,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127151 states. [2018-10-23 17:59:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127151 states to 127151 states and 140626 transitions. [2018-10-23 17:59:03,452 INFO L78 Accepts]: Start accepts. Automaton has 127151 states and 140626 transitions. Word has length 376 [2018-10-23 17:59:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:03,452 INFO L481 AbstractCegarLoop]: Abstraction has 127151 states and 140626 transitions. [2018-10-23 17:59:03,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 17:59:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 127151 states and 140626 transitions. [2018-10-23 17:59:03,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2018-10-23 17:59:03,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:03,465 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:03,466 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:03,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 640689002, now seen corresponding path program 1 times [2018-10-23 17:59:03,466 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:03,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:03,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:03,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:03,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:04,054 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 3 [2018-10-23 17:59:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 250 proven. 28 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:59:04,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:59:04,132 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 17:59:04,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:04,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:59:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 250 proven. 28 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:59:04,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:59:04,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-23 17:59:04,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 17:59:04,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 17:59:04,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 17:59:04,515 INFO L87 Difference]: Start difference. First operand 127151 states and 140626 transitions. Second operand 6 states. [2018-10-23 17:59:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:28,286 INFO L93 Difference]: Finished difference Result 290411 states and 319745 transitions. [2018-10-23 17:59:28,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 17:59:28,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 392 [2018-10-23 17:59:28,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:28,500 INFO L225 Difference]: With dead ends: 290411 [2018-10-23 17:59:28,500 INFO L226 Difference]: Without dead ends: 163262 [2018-10-23 17:59:28,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-23 17:59:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163262 states. [2018-10-23 17:59:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163262 to 130159. [2018-10-23 17:59:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130159 states. [2018-10-23 17:59:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130159 states to 130159 states and 142542 transitions. [2018-10-23 17:59:29,740 INFO L78 Accepts]: Start accepts. Automaton has 130159 states and 142542 transitions. Word has length 392 [2018-10-23 17:59:29,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:29,741 INFO L481 AbstractCegarLoop]: Abstraction has 130159 states and 142542 transitions. [2018-10-23 17:59:29,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 17:59:29,741 INFO L276 IsEmpty]: Start isEmpty. Operand 130159 states and 142542 transitions. [2018-10-23 17:59:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2018-10-23 17:59:29,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:29,761 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:59:29,761 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:29,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash -321722547, now seen corresponding path program 1 times [2018-10-23 17:59:29,762 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:29,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:29,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:29,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:29,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:30,123 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2018-10-23 17:59:30,124 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:59:30,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 17:59:30,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 17:59:30,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 17:59:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 17:59:30,125 INFO L87 Difference]: Start difference. First operand 130159 states and 142542 transitions. Second operand 3 states. [2018-10-23 17:59:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:34,955 INFO L93 Difference]: Finished difference Result 277612 states and 304664 transitions. [2018-10-23 17:59:34,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 17:59:34,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 456 [2018-10-23 17:59:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:36,169 INFO L225 Difference]: With dead ends: 277612 [2018-10-23 17:59:36,169 INFO L226 Difference]: Without dead ends: 147455 [2018-10-23 17:59:36,238 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 17:59:36,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147455 states. [2018-10-23 17:59:37,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147455 to 147455. [2018-10-23 17:59:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147455 states. [2018-10-23 17:59:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147455 states to 147455 states and 159421 transitions. [2018-10-23 17:59:37,607 INFO L78 Accepts]: Start accepts. Automaton has 147455 states and 159421 transitions. Word has length 456 [2018-10-23 17:59:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:37,607 INFO L481 AbstractCegarLoop]: Abstraction has 147455 states and 159421 transitions. [2018-10-23 17:59:37,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 17:59:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 147455 states and 159421 transitions. [2018-10-23 17:59:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2018-10-23 17:59:37,619 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:37,619 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:37,620 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:37,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:37,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1900862473, now seen corresponding path program 1 times [2018-10-23 17:59:37,620 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:37,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:37,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:37,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:37,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2018-10-23 17:59:38,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 17:59:38,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 17:59:38,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 17:59:38,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 17:59:38,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:59:38,097 INFO L87 Difference]: Start difference. First operand 147455 states and 159421 transitions. Second operand 5 states. [2018-10-23 17:59:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 17:59:50,495 INFO L93 Difference]: Finished difference Result 422045 states and 456666 transitions. [2018-10-23 17:59:50,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 17:59:50,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2018-10-23 17:59:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 17:59:50,811 INFO L225 Difference]: With dead ends: 422045 [2018-10-23 17:59:50,811 INFO L226 Difference]: Without dead ends: 274592 [2018-10-23 17:59:50,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-23 17:59:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274592 states. [2018-10-23 17:59:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274592 to 223454. [2018-10-23 17:59:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223454 states. [2018-10-23 17:59:54,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223454 states to 223454 states and 238973 transitions. [2018-10-23 17:59:54,035 INFO L78 Accepts]: Start accepts. Automaton has 223454 states and 238973 transitions. Word has length 467 [2018-10-23 17:59:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 17:59:54,036 INFO L481 AbstractCegarLoop]: Abstraction has 223454 states and 238973 transitions. [2018-10-23 17:59:54,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 17:59:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 223454 states and 238973 transitions. [2018-10-23 17:59:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2018-10-23 17:59:54,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 17:59:54,048 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 17:59:54,048 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 17:59:54,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 17:59:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1940674813, now seen corresponding path program 1 times [2018-10-23 17:59:54,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 17:59:54,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 17:59:54,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:54,049 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:54,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 17:59:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 491 proven. 70 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:59:54,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 17:59:54,652 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 17:59:54,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 17:59:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 17:59:54,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 17:59:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 491 proven. 70 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 17:59:54,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 17:59:54,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-23 17:59:54,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 17:59:54,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 17:59:54,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-23 17:59:54,996 INFO L87 Difference]: Start difference. First operand 223454 states and 238973 transitions. Second operand 6 states. [2018-10-23 18:00:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:00:17,698 INFO L93 Difference]: Finished difference Result 489783 states and 525278 transitions. [2018-10-23 18:00:17,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 18:00:17,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 488 [2018-10-23 18:00:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:00:18,018 INFO L225 Difference]: With dead ends: 489783 [2018-10-23 18:00:18,018 INFO L226 Difference]: Without dead ends: 266331 [2018-10-23 18:00:18,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 489 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-10-23 18:00:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266331 states. [2018-10-23 18:00:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266331 to 232478. [2018-10-23 18:00:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232478 states. [2018-10-23 18:00:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232478 states to 232478 states and 245233 transitions. [2018-10-23 18:00:22,875 INFO L78 Accepts]: Start accepts. Automaton has 232478 states and 245233 transitions. Word has length 488 [2018-10-23 18:00:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:00:22,876 INFO L481 AbstractCegarLoop]: Abstraction has 232478 states and 245233 transitions. [2018-10-23 18:00:22,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 18:00:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 232478 states and 245233 transitions. [2018-10-23 18:00:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2018-10-23 18:00:22,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:00:22,887 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2018-10-23 18:00:22,888 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:00:22,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:00:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash -198234994, now seen corresponding path program 1 times [2018-10-23 18:00:22,888 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:00:22,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:00:22,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:22,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:22,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 428 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2018-10-23 18:00:23,353 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:00:23,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:00:23,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:00:23,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:00:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:00:23,354 INFO L87 Difference]: Start difference. First operand 232478 states and 245233 transitions. Second operand 4 states. [2018-10-23 18:00:36,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:00:36,676 INFO L93 Difference]: Finished difference Result 454409 states and 479748 transitions. [2018-10-23 18:00:36,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 18:00:36,676 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2018-10-23 18:00:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:00:36,912 INFO L225 Difference]: With dead ends: 454409 [2018-10-23 18:00:36,912 INFO L226 Difference]: Without dead ends: 187285 [2018-10-23 18:00:37,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:00:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187285 states. [2018-10-23 18:00:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187285 to 181269. [2018-10-23 18:00:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181269 states. [2018-10-23 18:00:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181269 states to 181269 states and 190102 transitions. [2018-10-23 18:00:39,256 INFO L78 Accepts]: Start accepts. Automaton has 181269 states and 190102 transitions. Word has length 494 [2018-10-23 18:00:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:00:39,256 INFO L481 AbstractCegarLoop]: Abstraction has 181269 states and 190102 transitions. [2018-10-23 18:00:39,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:00:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 181269 states and 190102 transitions. [2018-10-23 18:00:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2018-10-23 18:00:39,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:00:39,265 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 18:00:39,265 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:00:39,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:00:39,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1920332186, now seen corresponding path program 1 times [2018-10-23 18:00:39,265 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:00:39,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:00:39,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:39,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:39,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:39,752 WARN L179 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-23 18:00:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 678 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2018-10-23 18:00:40,604 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 18:00:40,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 18:00:40,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 18:00:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 18:00:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-23 18:00:40,606 INFO L87 Difference]: Start difference. First operand 181269 states and 190102 transitions. Second operand 4 states. [2018-10-23 18:00:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 18:00:47,226 INFO L93 Difference]: Finished difference Result 360272 states and 377919 transitions. [2018-10-23 18:00:47,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 18:00:47,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 510 [2018-10-23 18:00:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 18:00:47,447 INFO L225 Difference]: With dead ends: 360272 [2018-10-23 18:00:47,447 INFO L226 Difference]: Without dead ends: 179005 [2018-10-23 18:00:47,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 18:00:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179005 states. [2018-10-23 18:00:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179005 to 172989. [2018-10-23 18:00:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172989 states. [2018-10-23 18:00:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172989 states to 172989 states and 180428 transitions. [2018-10-23 18:00:49,698 INFO L78 Accepts]: Start accepts. Automaton has 172989 states and 180428 transitions. Word has length 510 [2018-10-23 18:00:49,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 18:00:49,698 INFO L481 AbstractCegarLoop]: Abstraction has 172989 states and 180428 transitions. [2018-10-23 18:00:49,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 18:00:49,698 INFO L276 IsEmpty]: Start isEmpty. Operand 172989 states and 180428 transitions. [2018-10-23 18:00:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2018-10-23 18:00:49,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 18:00:49,705 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 18:00:49,705 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 18:00:49,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 18:00:49,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1340619621, now seen corresponding path program 1 times [2018-10-23 18:00:49,706 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 18:00:49,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 18:00:49,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:49,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:49,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 18:00:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 485 proven. 98 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 18:00:50,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 18:00:50,231 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 18:00:50,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 18:00:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 18:00:50,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 18:00:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 485 proven. 98 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2018-10-23 18:00:50,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 18:00:50,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-23 18:00:50,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 18:00:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 18:00:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-23 18:00:50,717 INFO L87 Difference]: Start difference. First operand 172989 states and 180428 transitions. Second operand 7 states. Received shutdown request... [2018-10-23 18:00:56,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 18:00:56,564 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 18:00:56,569 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 18:00:56,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:00:56 BoogieIcfgContainer [2018-10-23 18:00:56,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 18:00:56,570 INFO L168 Benchmark]: Toolchain (without parser) took 228061.55 ms. Allocated memory was 1.5 GB in the beginning and 4.3 GB in the end (delta: 2.8 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-23 18:00:56,571 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 18:00:56,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 2173.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:00:56,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 617.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.5 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -992.7 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2018-10-23 18:00:56,573 INFO L168 Benchmark]: Boogie Preprocessor took 291.91 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: 47.8 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. [2018-10-23 18:00:56,574 INFO L168 Benchmark]: RCFGBuilder took 8741.45 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 224.4 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -177.2 MB). Peak memory consumption was 630.1 MB. Max. memory is 7.1 GB. [2018-10-23 18:00:56,575 INFO L168 Benchmark]: TraceAbstraction took 216231.80 ms. Allocated memory was 2.6 GB in the beginning and 4.3 GB in the end (delta: 1.8 GB). Free memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: -234.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. [2018-10-23 18:00:56,582 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 2173.41 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Peak memory consumption was 200.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 617.25 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 798.5 MB). Free memory was 1.2 GB in the beginning and 2.2 GB in the end (delta: -992.7 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 291.91 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: 47.8 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 8741.45 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 224.4 MB). Free memory was 2.2 GB in the beginning and 2.3 GB in the end (delta: -177.2 MB). Peak memory consumption was 630.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 216231.80 ms. Allocated memory was 2.6 GB in the beginning and 4.3 GB in the end (delta: 1.8 GB). Free memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: -234.2 MB). Peak memory consumption was 1.6 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 99). Cancelled while BasicCegarLoop was constructing difference of abstraction (172989states) and FLOYD_HOARE automaton (currently 8 states, 7 states before enhancement),while ReachableStatesComputation was computing reachable states (8924 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 819 locations, 1 error locations. TIMEOUT Result, 216.1s OverallTime, 13 OverallIterations, 5 TraceHistogramMax, 187.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 7048 SDtfs, 40660 SDslu, 1726 SDs, 0 SdLazy, 93495 SolverSat, 17465 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 145.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2407 GetRequests, 2334 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 4.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=232478occurred in iteration=10, 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: 17.8s AutomataMinimizationTime, 12 MinimizatonAttempts, 172277 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 6695 NumberOfCodeBlocks, 6695 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 6675 ConstructedInterpolants, 0 QuantifiedInterpolants, 5880382 SizeOfPredicates, 5 NumberOfNonLiveVariables, 3068 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 20 InterpolantComputations, 10 PerfectInterpolantSequences, 6690/7102 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown